4 calculators in this category
- Manual J Heating & Cooling Load CalculatorACCA Manual J 8th ed. (block load)This calculator runs a whole-house block load in the shape ACCA Manual J uses: conduction through each envelope assembly…
- Air Conditioner BTU & Tonnage CalculatorAHAM / ENERGY STAR room AC sizing methodEnter the room's floor area and this calculator returns the cooling capacity it needs in BTU per hour and in tons, using the…
- Furnace Size (BTU Input) CalculatorACCA Manual S equipment selectionA furnace is sold by its input rating and it heats your house with its output . This calculator converts the design heat loss…
- R-Value to U-Value Converter CalculatorASHRAE Fundamentals thermal resistance conventionsR-value and U-factor are reciprocals of one another, but they are quoted in different units on either side of the Atlantic and…
Which one do you need?
- Manual J Heating & Cooling Load Calculator
- Estimate whole-house design heating and cooling loads from envelope areas, R-values, glass, infiltration and internal gains using a Manual J block method.
- Air Conditioner BTU & Tonnage Calculator
- Size a room air conditioner in BTU/h and tons from floor area, ceiling height, climate, insulation, sun exposure and occupancy, with a sizing table.
- Furnace Size (BTU Input) Calculator
- Convert your design heat loss into required furnace input BTU/h at any AFUE, with delivered output, altitude derate and an ACCA Manual S oversize check.
- R-Value to U-Value Converter Calculator
- Convert R-value to U-factor and back, in both IP and SI units, with RSI, conductance, material k and thickness, and the heat flow through an assembly.