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  2. British thermal unit - Wikipedia

    en.wikipedia.org/wiki/British_thermal_unit

    The Btu should not be confused with the Board of Trade Unit (BTU), an obsolete UK synonym for kilowatt hour (1 kW⋅h or 3,412 Btu). The Btu is often used to express the conversion-efficiency of heat into electrical energy in power plants. Figures are quoted in terms of the quantity of heat in Btu required to generate 1 kW⋅h of electrical energy.

  3. Cooling load temperature difference calculation method

    en.wikipedia.org/wiki/Cooling_load_temperature...

    U = Overall heat transfer coefficient in Btu/(ft2-hr-deg F) A = Area in square feet T1 = outdoor temperature in degrees F T2 = indoor temperature in degrees F For heat gains due to people, equipment (hooded and unhooded), and lighting

  4. File:Burn Degree Diagram hr.pdf - Wikipedia

    en.wikipedia.org/.../File:Burn_Degree_Diagram_hr.pdf

    This file is licensed under the Creative Commons Attribution-Share Alike 3.0 Unported license. Subject to disclaimers.: You are free: to share – to copy, distribute and transmit the work

  5. Heating seasonal performance factor - Wikipedia

    en.wikipedia.org/wiki/Heating_seasonal...

    [1] [2] It therefore has units of BTU/watt-hr. The higher the HSPF rating of a unit, the more energy efficient it is. An electrical resistance heater, which is not considered efficient, has an HSPF of 3.41. [3] Depending on the system, an HSPF ≥ 9 can be considered high efficiency and worthy of a US Energy Tax Credit. [4]

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  7. Glossary of HVAC terms - Wikipedia

    en.wikipedia.org/wiki/Glossary_of_HVAC_terms

    One BTU is the energy required to raise one pound of water one degree Fahrenheit, but the many different types of BTU are based on different interpretations of this “definition”. In the United States the power of HVAC systems (the rate of cooling and dehumidifying or heating) is sometimes expressed in BTU/hour instead of watts.

  8. List of abbreviations in oil and gas exploration and production

    en.wikipedia.org/wiki/List_of_abbreviations_in...

    BTU – British thermal units; BTU – Board of Trade Unit (1 kWh) (historical) BU – bottom up; BUL – bottom-up lag; BUR – build-up rate; BVO – ball valve operator; bwd – barrels of water per day (often used in reference to oil production) bwipd – barrels of water injected per day; bwpd – barrels of water per day

  9. Window insulation - Wikipedia

    en.wikipedia.org/wiki/Window_insulation

    The proportion of glass fibre in the profiles is 25%. The material used for this insulating bar stands out for its low thermal conductivity value (0.30 W/m2K) and its good mechanical properties even at higher temperatures. A non-thermally-separated frame from an aluminum window has a thermal transmission coefficient of 6.8 W/m2K. If the system ...