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...
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 of the cooling or heating output you need. ...
living space in total, it's time to calculate the necessary cubic feet per minute (CFM) 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. ...
With the known tonnage (or BTUs), the SEER rating, and the HSPF rating, we can calculate almost exactly how much electricity a heat pump use (watts, kWh usage) per hour, per day, and even per month. Based on that, we can calculate how much it costs to run a heat pump per hour...
There is a limit to the temperature difference across the cooling coil that air-cooled equipment can produce because of the refrigeration cycle. These types of units can typically produce a 20°F to 25°F delta T in the cooling condition. An engineer should always calculate the entering air ...
Due to HOA restrictions and a sliding glass window, I plan to get a portable air conditioner. I’ve read about dual hose conditioners and not sure if that’s the best way to go. I’m not sure how to calculate the necessary BTU’s needed. Can you help with any thoughts on this?