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2. Cooling load temperature difference calculation method

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

   The respective tables of data were generally developed by using the more complex transfer function method to determine the various cooling loads for different types of heating. [ 2 ] [ 3 ] The results gained by doing so are then normalized for each type of heat gain used for the tables, CLTD, CLF, and SCL.

3. Furnace (central heating) - Wikipedia

   en.wikipedia.org/wiki/Furnace_(central_heating)

   The pipes would channel the warm air into floor or wall vents inside the home. This method of heating worked because warm air rises. The system was simple, had few controls, a single automatic gas valve, and no blower. These furnaces could be made to work with any fuel simply by adapting the burner area.

4. Balance point temperature - Wikipedia

   en.wikipedia.org/wiki/Balance_point_temperature

   The building balance point temperature is the outdoor air temperature when the heat gains of the building are equal to the heat losses. [1] Internal heat sources due to electric lighting, mechanical equipment, body heat, and solar radiation may offset the need for additional heating although the outdoor temperature may be below the thermostat set-point temperature.

5. 6 vital home units: When to check or replace your furnace or ...

   www.aol.com/6-vital-home-units-check-101403555.html

   Replacing an HVAC system can be costly. Here's how long you can expect your system to last, along with other key home devices

6. R-value (insulation) - Wikipedia

   en.wikipedia.org/wiki/R-value_(insulation)

   The units of an R-value (see below) are usually not explicitly stated, and so it is important to determine from context which units are being used: an R-value expressed in I-P (inch-pound) units [13] is about 5.68 times larger than when expressed in SI units, [14] so that, for example, a window that is R-2 in I-P units has an RSI of 0.35 (since ...

7. Heat transfer coefficient - Wikipedia

   en.wikipedia.org/wiki/Heat_transfer_coefficient

   The heat transfer coefficient is the heat transferred per unit area per kelvin. Thus area is included in the equation as it represents the area over which the transfer of heat takes place. The areas for each flow will be different as they represent the contact area for each fluid side.