HVAC units, when sized properly, create any comfortable atmosphere for any making by providing the right amount of heating or cooling. Whilst units are sized too little, the unit may run for some very long time however by no means carry the building to the desired temperature. If the unit yous sized too large, there may be huge temperature swings as the unit runs only a short time but provides as well considerably heating or cooling. With a few tools and any calculator, it is easy to dimension a HVAC unit that will properly serve your building.

Difficulty: Tolerably Effortless Instructions

Tape measure

Calculator

1 Measure the square footage regarding each and every room on your building. This is performed by measuring the length and width of each and every area plus multiplying those double numbers together.

2 Add the square footage about each space together to get the square footage of the building.

3 Calculate the CFM (cubic feet per minute) need of the making. Your building will need 1 CFM per square foot. So if your building is 2,000 square feet, you'll want 2,000 CFM.

4 Calculate the size of the HVAC unit through taking the complete CFM demand and dividing it by 400. HVAC units are sized in "tons," also 400 CFM equals one ton. So if your building needs 2,000 CFM, the HVAC unit size you would require is a five ton unit.

Suggestions & Warnings

If you obtain a room in the making that has excessive sun exposure or has any lot of glass windows, use 2 CFM per square foot instead of 1 CFM per square foot to permit for the additional solar gain or heat loss.