TradesHVAC
HVAC tools
Comfort comes from right-sizing, not oversizing. These tools help you sanity-check equipment and airflow before you commit, and they are honest about when a full Manual J is the real answer.
HVAC HVAC Load Sanity Check Sanity-check a quoted air conditioner or furnace size before you commit, and know when you need a real Manual J. HVAC Duct Sizing Size a round duct for an airflow and see the velocity, with a quieter size up. HVAC Equipment vs Load Match Check whether an AC or heat pump size fits your load under the ACCA Manual S limits, or is oversized. HVAC Static Pressure Budget See how much static pressure your blower has left for the ducts after the filter, coil, and grilles. HVAC Refrigerant Line Sizing Pick the liquid and suction line size for a refrigerant run, and see when length or lift forces a change. HVAC Mini-Split Sizing Estimate the mini-split head size for a room from its area, climate, and conditions, without oversizing. HVAC CFM per Room Balance airflow to a room by its share of the load, and see how many supply registers deliver it. HVAC Grille and Register Sizing Size a supply register or return grille from its CFM, and pick the face velocity for quiet or compact.