Thermal transmittance definition

Thermal transmittance. ((U) (U = 1/R)) means the overall coefficient of heat transmission, air to air, expressed in British thermal units per hour per square foot per degree Fahrenheit. It is the time rate of heat flow. The U value applies to combinations of different materials used in series along the heat flow path, single materials that comprise a building section, cavity air spaces, and surfaces air films on both sides of a building element.
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Thermal transmittance or “U-factor” means the time rate of heat flow through a body or assembly which is located in between 2 different environments, expressed in Btu/h • ft.2 • °F. The U-factor applies to combinations of different materials used in series along the heat flow path and also to single materials that comprise a dwelling section, including cavity air spaces and air films on both sides of a dwelling element.
Sample 1Sample 2
Thermal transmittance or “U-factor” means the time rate of heat flow through a body or assembly which is located in between 2 different environments, expressed in Btu/h • ft.2
Sample 1

Examples of Thermal transmittance in a sentence

  • Thermal transmittance due to conduction (U) shall not exceed 0.42 (expressed in Btu/hr•ft2•F) and the condensation resistance factor (CRFf) at Frame shall not be less than 57.

  • Thermal transmittance due to conduction (U) shall not exceed 0.46 (expressed in Btu/hr•ft2•F) and the condensation resistance factor (CRFf) at Frame shall not be less than 61.

  • Thermal transmittance (U-Value) shall not exceed 0.35 BTU/hr/sf/degF for Single Hung windows when calculated using a COG glass U-value of .24 BTU/hr/sf/degF.

  • Thermal transmittance test results in accordance with AAMA 1503 or CSA A440 are based upon 1" (25.4 mm) clear insulating glass (1/4", 1/2" AS, 1/4”).

  • Thermal transmittance values can be calculated theoretically but very often there is a huge difference between the predicted and measured U-values.

  • Thermal transmittance simulation results using NFRC 100 or AAMA 507 are based on a Center of Glass (COG) U-factor of 0.24 Btu/(hr·ft2·°F) and a warm-edge spacer.

  • Thermal transmittance due to conduction (U) shall not exceed 0.42 (expressed in Btu/hr•ft2•F) and the condensation resistance factor (CRFf) at frame shall not be less than 57.

  • Thermal transmittance The thermal transmittance (U-value) of a building element is defined as the rate of heat transfer at steady-state, through one square metre area per degree change in temperature.

  • Thermal transmittance test results in accordance with AAMA 1503 or CSA A440 are based upon 1" (25.4 mm) clear, low-emissivity coated glass insulating unit, (1/4" e=0.035, #2), 1/2" warm edge spacer and argon fill gas, 1/4").

  • Thermal transmittance of floors and walls in contact with the ground, or space that is not conditioned space3.

Related to Thermal transmittance

  • transmitter means a person who owns or operates a transmission system;

  • Surplus Interconnection Request means a request submitted by a Surplus Interconnection Customer, pursuant to Tariff, Attachment RR, to utilize Surplus Interconnection Service within the Transmission System in the PJM Region. A Surplus Interconnection Request is not a New Service Request.

  • Conversion therapy means any practice or treatment as defined in § 54.1-2409.5 A of the Code of Virginia.

  • Reference Interconnection Offer or “RIO” means a document published by a service provider specifying terms and conditions on which the other service provider may seek interconnection with such service provider;

  • Interconnection Request means a Generation Interconnection Request, a Transmission Interconnection Request and/or an IDR Transfer Agreement.

  • State-certified production means a qualified production

  • Interregional Transmission Project means transmission facilities that would be located within two or more neighboring transmission planning regions and are determined by each of those regions to be a more efficient or cost effective solution to regional transmission needs.

  • Regional Transmission Enhancements means enhancements and expansions of the Transmission System that (1) a Regional Transmission Expansion Plan developed pursuant to Operating Agreement, Schedule 6 or (2) any joint planning or coordination agreement between PJM and another region or transmission planning authority set forth in Tariff, Schedule 12- Appendix B (“Appendix B Agreement”) designates one or more of the Transmission Owner(s) to construct and own or finance. Required Transmission Enhancements shall also include enhancements and expansions of facilities in another region or planning authority that meet the definition of transmission facilities pursuant to FERC’s Uniform System of Accounts or have been classified as transmission facilities in a ruling by FERC addressing such facilities constructed pursuant to an Appendix B Agreement cost responsibility for which has been assigned at least in part to PJM pursuant to such Appendix B Agreement.

  • Livery vehicle means a motor vehicle that:

  • Electronic delivery device means any product containing or delivering nicotine, lobelia, or any other substance, whether natural or synthetic, intended for human consumption that can be used by a person to simulate smoking in the delivery of nicotine or any other substance through inhalation of aerosol or vapor from the product. Electronic delivery devices includes but is not limited to devices manufactured, marketed, or sold as electronic cigarettes, electronic cigars, electronic pipe, vape pens, modes, tank systems, or under any other product name or descriptor. Electronic delivery device includes any component part of a product, whether or not marketed or sold separately. Electronic delivery device excludes drugs, devices, or combination products, as those terms are defined in the Federal Food, Drug, and Cosmetic Act, that are authorized for sale by the United States Food and Drug Administration.

  • Transmission means transmission by operation of law, devolution on the personal representative of a deceased person and any other mode of transfer, not being assignment;

  • Receipt Point means the receipt/inception point(s) where Crude Oil is received into the Gathering System, as such points are specified in Section II of this tariff.

  • Signaling Transfer Point (“STP”) means a signaling point that performs message routing functions and provides information for the routing of messages between signaling points within or between CCIS networks. An STP transmits, receives and processes CCIS messages.

  • Regional Transmission Organization or “RTO” means the regional transmission organization approved by the Federal Energy Regulatory Commission for the control area that includes the utility’s assigned service area (as defined in IC 8-1-2.3-2).

  • Central Transmission Utility means the Government Company notified by the Central Government under Sub-Section (1) of Section 38 of the Electricity Act, 2003.

  • Delivery Point means the point(s) of connection(s) at which energy is delivered into the Grid System i.e. the Interconnection Point.

  • CTU or Central Transmission Utility means the Central Transmission Utility as defined in Sub-Section (10) of section (2) of the EA-2003.

  • Distributed Generator means a person who owns or operates Distributed Generation;

  • Annual Transmission Costs means the total annual cost of the Transmission System for purposes of Network Integration Transmission Service shall be the amount specified in Attachment H for each Zone until amended by the applicable Transmission Owner or modified by the Commission. Applicable Laws and Regulations:

  • Electronically transmitted or “electronic transmission” means a communication sent or received through technological apparatuses, including computer terminals or other equipment or mechanisms linked by telephone or microwave relays, or any similar apparatus having electrical, digital, magnetic, wireless, optical, electromagnetic or similar capabilities.

  • Surplus Interconnection Service means any unneeded portion of Interconnection Service established in an Interconnection Service Agreement, such that if Surplus Interconnection Service is utilized, the total amount of Interconnection Service at the Point of Interconnection would remain the same. Switching and Tagging Rules:

  • Notice of Conversion/Extension means the written notice of conversion of a LIBOR Rate Loan to an Alternate Base Rate Loan or an Alternate Base Rate Loan to a LIBOR Rate Loan, or extension of a LIBOR Rate Loan, in each case substantially in the form of Exhibit 1.1(f).

  • INTER-CONNECTION POINT/ DELIVERY/ METERING POINT means a single point at 220kV or above, where the power from the Project(s) is injected into the identified ISTS Substation (including the dedicated transmission line connecting the Projects with the substation system) as specified in the RfS document. Metering shall be done at this interconnection point where the power is injected into. For interconnection with grid and metering, the WPDs shall abide by the relevant CERC/ SERC Regulations, Grid Code and Central Electricity Authority (Installation and Operation of Meters) Regulations, 2006 as amended and revised from time to time.

  • Confirmation Notice means a notice provided by the Issuer to an Investor in accordance with clause 1.3(c) of the Terms;

  • Instantaneous for monitoring requirements, means a single reading, observation, or measurement. If more than one sample is taken during any calendar day, each result obtained shall be considered.

  • Money transmission means any of the following: