Maintenance of Premises LESSOR will be responsible for all structural and roof maintenance of the leased premises but specifically excluding damage caused by the careless, malicious, willful, or negligent acts of LESSEE or others, chemical, water or corrosion damage from any source, and maintenance of the space heating, ventilating, and cooling units exclusively serving the leased premises (collectively, the "HVAC Unit") and of any non "building standard" leasehold improvements. LESSOR shall not be deemed to have breached its obligation to make the repairs required to be made by LESSOR unless LESSOR fails to make the same within a reasonable period (taking into consideration the type of repair involved) after receiving written notice from LESSEE of the need therefor. LESSEE agrees to maintain at its expense the HVAC Unit and all other aspects of the leased premises in the same condition as they are at the commencement of the term or as they may be put in during the term of this lease, normal wear and tear and damage by fire or other casualty only excepted, and whenever necessary, to replace light bulbs, plate glass and other glass therein, acknowledging that the leased premises are now in good order and the light bulbs and glass whole. If LESSOR so directs, LESSEE shall enter into a preventive maintenance/service contract acceptable to LESSOR with a maintenance contractor acceptable to LESSOR at LESSEE's sole cost and expense for servicing all air conditioning, heating, ventilating, and other equipment or other equipment located within or serving the leased premises. LESSEE will properly control or vent all solvents, degreasers, smoke, odors, etc. and shall not cause the area surrounding the leased premises to be in anything other than a neat and clean condition, depositing all waste in appropriate receptacles. LESSEE shall be solely responsible for any damage to plumbing equipment, sanitary lines, or any other portion of the building which results from the discharge or use of any acid or corrosive substance by LESSEE. LESSEE shall not permit the leased premises to be overloaded, damaged, stripped or defaced, nor suffer any waste, and will not keep animals within the leased premises. LESSEE will protect any carpet with plastic or masonite chair pads under any rolling chairs. Unless heat is provided at LESSOR's expense, LESSEE shall maintain sufficient heat to prevent freezing of pipes or other damage. Any increase in air conditioning equipment or electrical capacity, or any installation and/or maintenance of equipment which is necessitated by some specific aspect of LESSEE's use of the leased premises shall be at LESSEE's expense. All maintenance provided by LESSOR shall be during LESSOR's normal business hours.
