Main unit: An HVAC system's main unit may consist of the furnace, boiler, heat pump, or mini-split components. The main unit houses the controls for the HVAC system. Air handler: Except for boiler systems, an air handler is an indoor component that has the ability to forcefully move con...
If you already know the basics of CFM (Cubic Feet per Minute) and ACH (Air Changes per Hour) and just want to find out what’s needed for your home, skip to the Pick HVAC CFM Calculator. This tool will help you determine the CFM needed based on the ACH your space requires. It’s...
On top of that, when you usethis calculator for how many BTU air conditioners you need, you will also have to understand what AC tonnage that is. Conversely, when you use theAC tonnage calculator here, it might be useful to convert those tons into BTU to give you a better understanding ...
Size or capacity (tonnage); primary factor. The bigger the heat pump, the more power it will need to run. Example: 4-ton heat pump will use more electricity than a 2-ton unit. Cooling energy efficiency (SEER rating); primary factor for cooling. The more efficient the heat pump, the ...
A kilopascal (kPa) is metric unit used to calculate the force that an object exerts on another stationary object for every square meter of contact. This unit is commonly used in measuring atmospheric pressure and water pressure in metric countries.
On a single-phase 240V circuit feeding an A/C compressor/condenser unit, the equipment will draw typically 5 to 6, (7 in some cases) RLA per ton of cooling capacity. So if the data tag on a compressor shows its RLA rating=21.2 I would rate the system as 21.2/7=3 Tons. ...
Rooftop unit efficiencies Rooftop units are rated for different efficiencies based on the tonnage. Units rated for less than 65,000 Btu/hour are rated to a seasonal energy efficiency ratio, which “measures the total cooling of a central air conditioner or heat pump (inBtu) during the normal ...
for each room and the house overall and factor in the output of the HVAC system, which you do by dividing 400 (the average HVAC output in CFM/ton) by the square footage to provide a multiplier. The airflow required in each room is then [(HVAC system tonnage x 400) / area of entire...
BTU meaning: British Thermal Unit or BTU/h is a unit that determines the cooling/heating power of an HVAC device (air conditioner, furnace, etc.). What is BTU is an AC unit? Simply put, it’s the capacity or power of the AC. The bigger the BTU, the more cooling effect an AC uni...