Air Change Rate: Computes the number of times per hour the air in a space changes based on the flow rate of fresh air and the volume of the space.
Air Conditioner Size: Computes the number of BTUs needed to air condition a room with a window unit air conditioner based on the size of the room, number of occupants, sun exposure and use (kitchen or not).
Arithmetic Mean Temperature Difference: Computes the mean temperature difference based on the temperatures of the primary and secondary inlets and outlets of a system.
BTUs per hour to Heat a Room: Computes the energy (heat) required to heat a space of a certain volume by a specified temperature variance.
Cross-section Area: Computes the cross-section area of a pipe or conduit based on the diameter.
Heating and Cooling Load: Computes the amount of heat energy that conducts through a surface based on the temperature variance, surface area and coefficient of heat transmission.
Heat Exchange Area: Computes the exchange material surface area required to achieve an overall heat transfer flow rate through a heat exchanger based on the heat transfer material coefficient, and the desired temperature difference at the two ends of the heat exchanger.
Heating Load and Water Flow: Computes the ton of heat capacity associated with a volumetric flow of water and a change in temperature.
Heat Loss through a Wall: Computes the amount of heat energy that conducts through a wall based on the temperature variance, surface area and coefficient of heat transmission.
Heat Loss of a Room: Estimates the heat loss in a room based on the surface area of the interior of a rectangular room including the walls and ceiling, the temperature variance (inside and outside) and a coefficient of heat transfer.
(U) Heat Transfer Coefficients: Description of the coefficient of heat transfer and the values associated with numerous materials.
Insulation Calculator: Twenty (20) equations and data items related to insulation (rolls, cellulose. loose fiberglass and shake and rake)
Ventilation Rate per Person: Computes the ventilation rate per person based on the flow rate of fresh air, volume of the space, occupant density and the ceiling height.
Volume of a Room: Computes the volume of a room based on the height of the ceiling and the length and width of the floor.