Common use of HVAC Clause in Contracts

HVAC. A. Heating, ventilating and air conditioning equipment will be provided with sufficient capacity to accommodate a maximum population density of one (1) person per one hundred fifty (150) square feet of useable floor area served, and a combined lighting and standard electrical load of 3.0 xxxxx per square foot of useable floor area. In the event Tenant introduces into the Premises personnel or equipment which overloads the system’s ability to adequately perform its proper functions, Landlord shall so notify Tenant in writing and supplementary system(s) may be required and installed by Landlord at Tenant’s expense, if within fifteen (15) days Tenant has not modified its use so as not to cause such overload. Operating criteria of the basic system shall not be less than the following: (i) Cooling season indoor temperatures of not in excess of 73 - 79 degrees Fahrenheit when outdoor temperatures are 91 degrees Fahrenheit ambient. (ii) Heating season minimum room temperature of 68 - 75 degrees Fahrenheit when outdoor temperatures are 6 degrees Fahrenheit ambient. B. Landlord shall provide heating, ventilating and air conditioning as normal seasonal changes may require during the hours of 8:00 a.m. to 6:00 p.m. Monday through Friday (legal holidays in all cases excepted). If Tenant shall require air conditioning (during the air conditioning season) or heating or ventilating during any other time period, Landlord shall use landlord’s best efforts to furnish such services for the area or areas specified by written request of Tenant delivered to the Building Superintendent or the Landlord before 3:00 p.m. of the business day preceding the extra usage. Landlord shall charge Tenant for such extra-hours usage at reasonable rates customary for first-class office buildings in the Boston Suburban market, and Tenant shall pay Landlord, as Additional Rent, upon receipt of billing therefor.

HVAC. A. Heating, ventilating and air conditioning equipment will be provided with sufficient capacity to accommodate a maximum population density of one (1) person per one hundred fifty (150) square feet of useable floor area served, and a combined lighting and standard electrical load of 3.0 xxxxx per square foot of useable floor area. In the event Tenant introduces into the Premises personnel or equipment which overloads the system’s 's ability to adequately perform its proper functions, Landlord shall so notify Tenant in writing and supplementary system(s) may be required and installed by Landlord at Tenant’s 's expense, if within fifteen (15) days Tenant has not modified its use so as not to cause such overload. Operating criteria of the basic system are in accordance with the Massachusetts Energy Code and shall not be less than the following: (i) Cooling season indoor temperatures conditions of not in excess of 73 - 79 78 degrees Fahrenheit when outdoor temperatures conditions are 91 degrees Fahrenheit ambientdrybulb and 73 degrees Fahrenheit wetbulb. (ii) Heating season minimum room temperature of 68 - 75 72 degrees Fahrenheit when outdoor temperatures conditions are 6 degrees Fahrenheit ambientdrybulb. B. Landlord shall provide heating, ventilating and air conditioning as normal seasonal changes charges may require during the hours of Normal Building Operating Hours (8:00 a.m. to 6:00 p.m. p.m., Monday through Friday (Friday, and 8:00 a.m. to 1:00 p.m. on Saturdays, legal holidays in all cases excepted). If Tenant shall require air conditioning (during the air conditioning season) or heating or ventilating during any other time periodseason outside Normal Building Operating Hours, Landlord shall use landlord’s 's best efforts to furnish such services for the area or areas specified by written request of Tenant delivered to the Building Superintendent or the Landlord before 3:00 p.m. of the business day preceding the extra usage. Landlord shall charge Tenant for For such extra-hours usage at reasonable rates customary for first-class office buildings in the Boston Suburban marketservices, and Tenant shall pay Landlord, as Additional Rentadditional rent, upon receipt of billing thereforbilling, a sum equal to the cost incurred by Landlord.

HVAC. A. Heating, ventilating and air conditioning equipment will be provided with sufficient capacity to accommodate a maximum population density of one (1) person per one hundred fifty (150) square feet of useable floor area served, and a combined lighting and standard electrical load of 3.0 xxxxx per square foot of useable floor area. In the event Tenant introduces into the Premises personnel or equipment which overloads the system’s ability to adequately perform its proper functions, Landlord shall so notify Tenant in writing and supplementary system(s) may be required and installed by Landlord at Tenant’s expense, if within fifteen (15) days Tenant has not modified its use so as not to cause such overload. Operating criteria of the basic system shall not be less than the following: (i) Cooling season indoor temperatures of not in excess of 73 - 79 degrees Fahrenheit when outdoor temperatures are 91 degrees Fahrenheit ambient. (ii) Heating season minimum room temperature of 68 - 75 degrees Fahrenheit when outdoor temperatures are 6 degrees Fahrenheit ambient. B. Landlord shall provide heating, ventilating and air conditioning as normal seasonal changes may require during the hours of 8:00 a.m. to 6:00 p.m. Monday through Friday (legal holidays in all cases excepted). If Tenant shall require air conditioning (during the air conditioning season) or heating or ventilating during any other time period, Landlord shall use landlord’s best efforts to furnish such services for the area or areas specified by written request of Tenant Xxxxxx delivered to the Building Superintendent or the Landlord before 3:00 p.m. of the business day preceding the extra usage. Landlord shall charge Tenant for such extra-hours usage at reasonable rates customary for first-class office buildings in the Boston Suburban market, and Tenant shall pay Landlord, as Additional Rent, upon receipt of billing therefor.

HVAC. A. Heating, ventilating and air conditioning equipment will be provided with sufficient capacity to accommodate a maximum population density of one (1) person per one hundred fifty (150) square feet of useable floor area served, and a combined lighting and standard electrical load of 3.0 6.0 xxxxx per square foot of useable floor area. In the event Tenant introduces into the Premises personnel or equipment which overloads the system’s ability to adequately perform its proper functions, Landlord shall so notify Tenant in writing and supplementary system(s) may be required and installed by Landlord at Tenant’s expense, if within fifteen (15) days Tenant has not modified its use so as not to cause such overload. Operating criteria of the basic system shall not be less than the following: (i1) Cooling season indoor temperatures temperature of not in excess of 73 - 79 degrees Fahrenheit when outdoor temperatures are temperature is 91 degrees Fahrenheit ambient. (ii2) Heating season minimum room temperature of 68 - 75 degrees Fahrenheit when outdoor temperatures are temperature is 6 degrees Fahrenheit ambient. B. Landlord shall provide heating, ventilating and air conditioning as normal seasonal changes may require during the hours of Normal Building Operating Hours (8:00 a.m. to 6:00 p.m. p.m., Monday through Friday (Friday, legal holidays in all cases excepted). If Tenant shall require air conditioning (during the air conditioning season) or heating or ventilating during any other time periodseason outside Normal Building Operating Hours, Landlord shall use landlord’s best efforts to furnish such services for the area or areas specified by written request of Tenant delivered to the Building Superintendent or the Landlord before 3:00 p.m. of the business day preceding the extra usage. Landlord shall charge Tenant for For such extra-hours usage at reasonable rates customary for first-class office buildings in the Boston Suburban marketservices, and Tenant shall pay Landlord, as Additional Rent, upon receipt of billing thereforbilling, a sum equal to the cost incurred by Landlord.

HVAC. A. Heating, ventilating and air conditioning equipment will be provided with sufficient capacity to accommodate a maximum population density of one (1) person per one hundred fifty (150) square feet of useable floor area served, and a combined lighting and standard electrical load of 3.0 xxxxx per square foot of useable floor area. In the event Tenant introduces into the Premises personnel or equipment which overloads the system’s ability to adequately perform its proper functions, Landlord shall so notify Tenant in writing and supplementary system(s) may be required and installed by Landlord at Tenant’s expense, if within fifteen (15) days Tenant has not modified its use so as not to cause such overload. Operating criteria of the basic system shall not be less than the following: (i) Cooling season indoor temperatures temperature of not in excess of 73 - 79 degrees Fahrenheit when outdoor temperatures are temperature is 91 degrees Fahrenheit ambient. (ii) Heating season minimum room temperature of 68 - 75 degrees Fahrenheit when outdoor temperatures are temperature is 6 degrees Fahrenheit ambient. B. Landlord shall provide heating, ventilating and air conditioning as normal seasonal changes may require during the hours of 8:00 a.m. to 6:00 p.m. Monday through Friday (legal holidays in all cases excepted). If Tenant shall require air conditioning (during the air conditioning season) or heating or ventilating during any other time period, Landlord shall use landlord’s best efforts to furnish such services for the area or areas specified by written request of Tenant delivered to the Building Superintendent or the Landlord before 3:00 p.m. of the business day preceding the extra usage. Landlord shall charge Tenant for such extra-hours usage at reasonable rates customary for first-class office buildings in the Boston Suburban market, and Tenant shall pay Landlord, as Additional Rent, upon receipt of billing therefortherefore.

HVAC. A. Heating, ventilating and air conditioning equipment will be provided with sufficient capacity to accommodate a maximum population density of one (1) person per one hundred fifty (150) square feet of useable floor area served, and a combined lighting and standard electrical load of 3.0 xxxxx per square foot of useable floor area. In the event Tenant introduces into the Premises personnel or equipment which overloads the system’s ability to adequately perform its proper functions, Landlord shall so notify Tenant in writing and supplementary system(s) may be required and installed by Landlord at Tenant’s expense, if within fifteen (15) days Tenant has not modified its use so as not to cause such overload. Operating criteria of the basic system shall not be less than the following: (i) Cooling season indoor temperatures of not in excess of 73 - 79 degrees Fahrenheit when outdoor temperatures are 91 degrees Fahrenheit ambient. (ii) Heating season minimum room temperature of 68 - 75 degrees Fahrenheit when outdoor temperatures are 6 degrees Fahrenheit ambient. B. Landlord shall provide heating, ventilating and air conditioning as normal seasonal changes may require during the hours of 8:00 a.m. to 6:00 p.m. Monday through Friday and (only upon written request of Tenant delivered to the Building Superintendent or the Landlord before 3:00 p.m. of the business day preceding, but without supplemental charge) during the hours of 9:00 a.m. to 1:00 p.m. on Saturday (legal holidays in all cases excepted). If Tenant shall require air conditioning (during the air conditioning season) or heating or ventilating during any other time period, Landlord shall use landlord’s best efforts to furnish such services for the area or areas specified by written request of Tenant delivered to the Building Superintendent or the Landlord before 3:00 p.m. of the business day preceding the extra usage. Landlord shall charge Tenant for such extra-hours usage at reasonable rates customary for first-class office buildings in the Boston Suburban market, and Tenant shall pay Landlord, as Additional Rent, upon receipt of billing therefor.

HVAC. A. Heating, ventilating and air conditioning equipment will be provided with sufficient capacity to accommodate a maximum population density of one (1) person per one hundred fifty (150) square feet of useable floor area served, and a combined lighting and standard electrical load of 3.0 xxxxx wxxxx per square foot of useable floor area. In the event Tenant introduces into the Premises personnel or equipment which overloads the system’s ability to adequately perform its proper functions, Landlord shall so notify Tenant in writing and supplementary system(s) may be required and installed by Landlord at Tenant’s expense, if within fifteen (15) days Tenant has not modified its use so as not to cause such overload. Operating criteria of the basic system shall not be less than the following: (i) Cooling season indoor temperatures temperature of not in excess of 73 - 79 degrees Fahrenheit when outdoor temperatures are temperature is 91 degrees Fahrenheit ambient. (ii) Heating season minimum room temperature of 68 - 75 degrees Fahrenheit when outdoor temperatures are temperature is 6 degrees Fahrenheit ambient. B. Landlord shall provide heating, ventilating and air conditioning as normal seasonal changes may require during the hours of 8:00 a.m. to 6:00 p.m. Monday through Friday (legal holidays in all cases excepted). If Tenant shall require air conditioning (during the air conditioning season) or heating or ventilating during any other time period, Landlord shall use landlord’s best efforts to furnish such services for the area or areas specified by written request of Tenant delivered to the Building Superintendent or the Landlord before 3:00 p.m. of the business day preceding the extra usage. Landlord shall charge Tenant for such extra-hours usage at reasonable rates customary for first-class office buildings in the Boston Suburban market, and Tenant shall pay Landlord, as Additional Rent, upon receipt of billing therefor.

HVAC. A. Heating, ventilating and air conditioning equipment will be provided with sufficient capacity to accommodate a maximum population density of one (1) person per one hundred fifty (150) square feet of useable floor area served, and a combined lighting and standard electrical load of 3.0 xxxxx per square foot of useable floor area. In the event Tenant introduces into the Premises personnel or equipment which overloads the system’s ability to adequately perform its proper functions, Landlord shall so notify Tenant in writing and supplementary system(s) may be required and installed by Landlord at Tenant’s expense, if within fifteen (15) days Tenant has not modified its use so as not to cause such overload. Operating criteria of the basic system shall not be less than the following: (i) Cooling season indoor temperatures of not in excess of 73 - 79 73—79 degrees Fahrenheit when outdoor temperatures are 91 degrees Fahrenheit ambient. (ii) Heating season minimum room temperature of 68 - 75 68—75 degrees Fahrenheit when outdoor temperatures are 6 degrees Fahrenheit ambient. B. Landlord shall provide heating, ventilating and air conditioning as normal seasonal changes may require during the hours of 8:00 a.m. to 6:00 p.m. Monday through Friday (legal holidays in all cases excepted). If Tenant shall require air conditioning (during the air conditioning season) or heating or ventilating during any other time period, Landlord shall use landlordLandlord’s best efforts to furnish such services for the area or areas specified by written request of Tenant delivered to the Building Superintendent or the Landlord before 3:00 p.m. of the business day preceding the extra usage. Landlord shall charge Tenant for such extra-hours usage at reasonable rates customary for first-class office buildings in the Boston Suburban market, and Tenant shall pay Landlord, as Additional Rent, upon receipt of billing therefor.

HVAC. A. Heating, ventilating and air conditioning equipment will be provided with sufficient capacity to accommodate a maximum population density of one (1) person per one hundred fifty (150) square feet of useable floor area served, and a combined lighting and standard electrical load of 3.0 xxxxx wxxxx per square foot of useable floor area. In the event Tenant introduces into the Premises personnel or equipment which overloads the system’s ability to adequately perform its proper functions, Landlord shall so notify Tenant in writing and supplementary system(s) may be required and installed by Landlord at Tenant’s expense, if within fifteen (15) days Tenant has not modified its use so as not to cause such overload. Operating criteria of the basic system shall not be less than the following: (i) Cooling season indoor temperatures temperature of not in excess of 73 - – 79 degrees Fahrenheit when outdoor temperatures are 91 degrees Fahrenheit ambient. (ii) Heating season minimum room temperature of 68 - – 75 degrees Fahrenheit when outdoor temperatures are 6 degrees Fahrenheit ambient. B. Landlord shall provide heating, ventilating and air conditioning as normal seasonal changes may require during the hours of 8:00 a.m. to 6:00 7:00 p.m. Monday through Friday (legal holidays in all cases excepted). If Tenant shall require air conditioning (during the air conditioning season) or heating or ventilating during any other time period, Landlord shall use landlord’s best efforts to furnish such services for the area or areas specified by written request of Tenant delivered to the Building Superintendent or the Landlord before 3:00 p.m. of the business day preceding the extra usage. Landlord shall charge Tenant for such extra-hours usage at reasonable rates customary for first-class office buildings in the Boston Suburban market, and Tenant shall pay Landlord, as Additional Rent, upon receipt of billing therefor.

HVAC. A. Heating, ventilating and air conditioning equipment will be provided with sufficient capacity to accommodate a maximum population density of one (1) person per one hundred fifty (150) square feet of useable floor area served, and a combined lighting and standard electrical load of 3.0 xxxxx per square foot of useable floor area. In the event Tenant introduces into the Premises personnel or equipment which overloads the system’s 's ability to adequately perform its proper functions, Landlord shall so notify Tenant in writing and supplementary system(s) may be required and installed by Landlord at Tenant’s 's expense, if within fifteen (15) days Tenant has not modified its use so as not to cause such overload. Operating criteria of the basic system shall not be less than the following: (i) i. Cooling season indoor temperatures temperature of not in excess of 73 - 79 degrees Fahrenheit when outdoor temperatures are temperature is 91 degrees Fahrenheit ambient. (ii) . Heating season minimum room temperature of 68 - 75 degrees Fahrenheit when outdoor temperatures are temperature is 6 degrees Fahrenheit ambient. B. Landlord shall provide heating, ventilating and air conditioning as normal seasonal changes charges may require during the hours of 8:00 a.m. 7am to 6:00 p.m. 9pm Monday through Friday (legal holidays in all cases excepted)) at Tenant's expense. Exhibit D If Tenant shall require air conditioning (during the air conditioning season) or heating or ventilating during any other time period, Landlord shall use landlord’s 's best efforts to furnish such services for the area or areas specified by written request of Tenant delivered to the Building Superintendent or the Landlord before 3:00 p.m. of the business day preceding the extra usage. Landlord shall charge Tenant for such extra-hours usage at reasonable rates customary for first-class office buildings in the Boston Suburban market, and Tenant shall pay Landlord, as Additional Rent, upon receipt of billing therefor.

HVAC. A. Heating, ventilating and air conditioning equipment will be provided with sufficient capacity to accommodate a maximum population density of one (1) person per one hundred fifty (150) square feet of useable floor area served, and a combined lighting and standard electrical load of 3.0 xxxxx per square foot of useable floor area. In the event Tenant introduces into the Premises personnel or equipment which overloads the system’s ability to adequately perform its proper functions, Landlord shall so notify Tenant in writing and supplementary system(s) may be required and installed by Landlord at Tenant’s expense, if within fifteen (15) days Tenant has not modified its use so as not to cause such overload. Operating criteria of the basic system shall not be less than the following: (i) Cooling season indoor temperatures of not in excess of 73 - 79 degrees Fahrenheit when outdoor temperatures are 91 degrees Fahrenheit ambient. (ii) Heating season minimum room temperature of 68 - 75 degrees Fahrenheit when outdoor temperatures are 6 degrees Fahrenheit ambient. B. Landlord shall provide heating, ventilating and air conditioning as normal seasonal changes may require during the hours of 8:00 a.m. to 6:00 p.m. Monday through Friday (legal holidays in all cases excepted). If Tenant shall require air conditioning (during the air conditioning season) or heating or ventilating during any other time period, Landlord shall use landlord’s best efforts to furnish such services for the area or areas specified by written request of Tenant delivered to the Building Superintendent or the Landlord before 3:00 p.m. of the business day preceding the extra usage. Landlord shall charge Tenant for such extra-hours usage at reasonable rates customary for first-class office buildings in the Boston Suburban market, and Tenant shall pay Landlord, as Additional Rent, upon receipt of billing therefor.

HVAC. A. Heating, ventilating and air conditioning equipment will be provided with sufficient capacity to accommodate a maximum population density of one (1) person per one hundred fifty (150) square feet of useable floor area served, and a combined lighting and standard electrical load of 3.0 6.0 xxxxx per square foot of useable floor area. In the event Tenant introduces into the Premises personnel or equipment which overloads the system’s ability to adequately perform its proper functions, Landlord shall so notify Tenant in writing and supplementary system(s) may be required and installed by Landlord at Tenant’s expense, if within fifteen (15) days Tenant has not modified its use so as not to cause such overload. Operating criteria of the basic system shall not be less than the following: (i) Cooling season indoor temperatures temperature of not in excess of 73 - 79 degrees Fahrenheit when outdoor temperatures are temperature is 91 degrees Fahrenheit ambient. (ii) Heating season minimum room temperature of 68 - 75 degrees Fahrenheit when outdoor temperatures are temperature is 6 degrees Fahrenheit ambient.Fahrenheit B. Landlord shall provide heating, ventilating and air conditioning as normal seasonal changes may require during the hours of Normal Building Operating Hours (8:00 a.m. to 6:00 p.m. p.m., Monday through Friday Friday, (legal and upon request 8:00 a.m. to 1:00 p.m. on Saturdays) the following holidays in all cases excepted). : New Year’s Day President’s Day Memorial Day Independence Day Labor Day Thanksgiving Day Christmas Day If Tenant shall require air conditioning (during the air conditioning season) or heating or ventilating during any other time periodseason outside Normal Building Operating Hours, Landlord shall use landlord’s best efforts to furnish such services for the area or areas specified by written request of Tenant delivered to the Building Superintendent or the Landlord before 3:00 p.m. of the business day preceding the extra usage. Landlord shall charge Tenant for For such extra-hours usage at reasonable rates customary for first-class office buildings in the Boston Suburban marketservices, and Tenant shall pay Landlord, as Additional Rent, upon receipt of billing thereforbilling, a sum equal to the cost incurred by Landlord.

HVAC. A. Heating, ventilating and air conditioning equipment will be provided with sufficient capacity to accommodate a maximum population density of one (1) person per one hundred fifty (150) square feet of useable floor area served, and a combined lighting and standard electrical load of 3.0 xxxxx per square foot of useable floor area. In the event Tenant introduces into the Premises personnel or equipment which overloads the system’s ability to adequately perform its proper functions, Landlord shall so notify Tenant in writing and supplementary system(s) may be required and installed by Landlord at Tenant’s expense, if within fifteen (15) days Tenant has not modified its use so as not to cause such overload. Operating criteria of the basic system shall not be less than the following: (i) Cooling season indoor temperatures of not in excess of 73 - 79 degrees Fahrenheit when outdoor temperatures are 91 degrees Fahrenheit ambientambient or higher. (ii) Heating season minimum room temperature of 68 - 75 degrees Fahrenheit when outdoor temperatures are 6 degrees Fahrenheit ambientambient or lower. B. Landlord shall provide heating, ventilating and air conditioning as normal seasonal changes may require during the hours of 8:00 a.m. to 6:00 p.m. Monday through Friday (legal holidays in all cases excepted). If Tenant shall require air conditioning (during the air conditioning season) or heating or ventilating during any other time period, Landlord shall use landlord’s best efforts to furnish such services for the area or areas specified by written request of Tenant delivered to the Building Superintendent or the Landlord before 3:00 p.m. of the business day preceding the extra usage. Landlord shall charge Tenant for such extra-hours usage at reasonable rates customary for first-class office buildings in the Boston Suburban market, and Tenant shall pay Landlord, as Additional Rent, upon receipt of billing therefor.

HVAC. A. Heating, ventilating and air conditioning equipment will be provided with sufficient capacity to accommodate a maximum population density of one (1) person per one hundred fifty (150) square feet of useable floor area served, and a combined lighting and standard electrical load of 3.0 xxxxx per square foot of useable floor area. In the event Tenant introduces into the Premises personnel or equipment which overloads the system’s ability to adequately perform its proper functions, Landlord shall so notify Tenant in writing and supplementary system(s) may be required and installed by Landlord at Tenant’s expense, if within fifteen (15) days Tenant has not modified its use so as not to cause such overload. Operating criteria of the basic system shall not be less than the following: (i) Cooling season indoor temperatures temperature of not in excess of 73 - 79 degrees Fahrenheit when outdoor temperatures are temperature is 91 degrees Fahrenheit ambient. (ii) Heating season minimum room temperature of 68 - 75 degrees Fahrenheit when outdoor temperatures are temperature is 6 degrees Fahrenheit ambient. B. Landlord shall provide heating, ventilating and air conditioning as normal seasonal changes may require during the hours of 8:00 a.m. to 6:00 p.m. Monday through Friday (legal holidays in all cases excepted). If Tenant shall require air conditioning (during the air conditioning season) or heating or ventilating during any other time period, Landlord shall use landlord’s best efforts to furnish such services for the area or areas specified by written request of Tenant delivered to the Building Superintendent or the Landlord before 3:00 p.m. of the business day preceding the extra usage. Landlord shall charge Tenant for such extra-hours usage at reasonable rates customary for first-class office buildings in the Boston Suburban market, and Tenant shall pay Landlord, as Additional Rent, upon receipt of billing therefor.

HVAC. A. Heating, ventilating and air conditioning equipment will be provided with sufficient capacity to accommodate a maximum population density of one (1) person per one hundred fifty (150) square feet of useable floor area served, and a combined lighting and standard electrical load of 3.0 xxxxx per square foot of useable floor area. In the event Tenant introduces into the Premises personnel or equipment which overloads the system’s ability to adequately perform its proper functions, Landlord shall so notify Tenant in writing and supplementary system(s) may be required and installed by Landlord at Tenant’s expense, if within fifteen (15) days Tenant has not modified its use so as not to cause such overload. Operating criteria of the basic system shall not be less than the following: (i) Cooling season indoor temperatures of not in excess of 73 - 79 -79 degrees Fahrenheit when outdoor temperatures are 91 degrees Fahrenheit ambient. (ii) Heating season minimum room temperature of 68 - 75 degrees Fahrenheit when outdoor temperatures are 6 degrees Fahrenheit ambient. B. Landlord shall provide heating, ventilating and air conditioning as normal seasonal changes may require during the hours of 8:00 a.m. to 6:00 p.m. Monday through Friday (legal holidays in all cases excepted). If Tenant shall require air conditioning (during the air conditioning season) or heating or ventilating during any other time period, Landlord shall use landlordLandlord’s best efforts to furnish such services for the area or areas specified by written request of Tenant delivered to the Building Superintendent or the Landlord before 3:00 p.m. of the business day preceding the extra usage. Landlord shall charge Tenant for such extra-hours usage at reasonable rates customary for first-class office buildings in the Boston Suburban market, and Tenant shall pay Landlord, as Additional Rent, upon receipt of billing therefor.

HVAC. A. Heating, ventilating and air conditioning equipment will be provided with sufficient capacity to accommodate a maximum population density of one (1) person per one hundred fifty (150) square feet of useable floor area served, and a combined lighting and standard electrical load of 3.0 xxxxx 6.0 wxxxx per square foot of useable floor area. In the event Tenant introduces into the Premises personnel or equipment which overloads the system’s ability to adequately perform its proper functions, Landlord shall so notify Tenant in writing and supplementary system(s) may be required and installed by Landlord at Tenant’s expense, if within fifteen (15) days Tenant has not modified its use so as not to cause such overload. Operating criteria of the basic system shall not be less than the following: (i) Cooling season indoor temperatures temperature of not in excess of 73 - 79 degrees Fahrenheit when outdoor temperatures are temperature is 91 degrees Fahrenheit ambient. (ii) Heating season minimum room temperature of 68 - 75 degrees Fahrenheit when outdoor temperatures are temperature is 6 degrees Fahrenheit ambient. B. Landlord shall provide heating, ventilating and air conditioning as normal seasonal changes may require during the hours of Normal Building Operating Hours (8:00 a.m. to 6:00 p.m. p.m., Monday through Friday (Friday, legal holidays in all cases excepted). If Tenant shall require air conditioning (during the air conditioning season) or heating or ventilating during any other time periodseason outside Normal Building Operating Hours, Landlord shall use landlord’s best efforts to furnish such services for the area or areas specified by written request of Tenant delivered to the Building Superintendent or the Landlord before 3:00 p.m. of the business day preceding the extra usage. Landlord shall charge Tenant for such extra-hours usage at reasonable rates customary for first-class office buildings in the Boston Suburban market, and Tenant shall pay Landlord, as Additional Rent, upon receipt of billing therefor.before

HVAC. A. Heating, ventilating and air conditioning equipment will be provided with sufficient capacity to accommodate a maximum population density of one (1) person per one hundred fifty (150) square feet of useable floor area served, and a combined lighting and standard electrical load of 3.0 4.5 xxxxx per square foot of useable floor area. In the event Tenant introduces into the Premises personnel or equipment which overloads the system’s ability to adequately perform its proper functions, Landlord shall so notify Tenant in writing and supplementary system(s) may be required and installed by Landlord at Tenant’s expense, if within fifteen (15) days Tenant has not modified its use so as not to cause such overload. Operating criteria of the basic system shall not be less than the following: (i) Cooling season indoor temperatures of not in excess of 73 - 79 73-78 degrees Fahrenheit when outdoor temperatures are 91 degrees Fahrenheit ambient. (ii) Heating season minimum room temperature of 68 - 68-75 degrees Fahrenheit when outdoor temperatures are 6 degrees Fahrenheit ambient. B. Landlord shall provide heating, ventilating and air conditioning as normal seasonal changes may require during the hours of 8:00 a.m. to 6:00 p.m. Monday through Friday (legal holidays in all cases excepted). If Tenant shall require air conditioning (during the air conditioning season) or heating or ventilating during any other time period, Landlord shall use landlordLandlord’s best efforts to furnish such services for the area or areas specified by written request of Tenant delivered to the Building Superintendent or the Landlord before 3:00 p.m. of the business day preceding the extra usage. Landlord shall charge Tenant for such extra-hours usage at reasonable rates customary for first-class office buildings to be calculated in the Boston Suburban marketaccordance with Exhibit D-1 attached hereto, and Tenant shall pay Landlord, as Additional Rent, upon receipt of billing therefor.