🇨🇦 Canada
CSA F280 Heat Loss Calculator
(Canada)
Heat loss and gain estimate for Ontario, BC and all of Canada
CSA F280-12Free Trade Calculators
Professional tools to help you estimate, plan, and quote jobs accurately
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HVAC
Size equipment, airflow, and ductwork
CSA F280 Heat Loss Calculator
🇺🇸 US
Heat Load Calculator
(US)
Calculate heating & cooling loads for American homes
ACCA Manual JGlobal
CFM Calculator
(Airflow / Air Changes)
Find required CFM from room size or heating/cooling load
CFM = V × ACH ÷ 60Global
Duct Size Calculator
Size round and rectangular ducts from CFM and velocity
d = √(4A ÷ π)Plumbing
Pipe volumes, weights, and runs
Electrical
Service loads and panel sizing
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