Sam Gorman

Estimate yearly thermostat savings, payback time, monthly savings, and multi-year net savings from settings or a smart thermostat.

Find the printed HVAC filter size to buy from measured length, width, and depth, plus a quick fit check for odd or loose sizes.

Size a new return air grille or check an existing grille using airflow, open area, and target air speed.

Size round or rectangular HVAC ducts from CFM, then check actual speed, friction rate, and straight-duct pressure drop.

Find ACH from room size and airflow, or find needed CFM or L/s for a target ACH. Includes simple clearing-time estimates.

Calculate CFM for room ventilation or duct airflow, then compare a fan rating and see rounded CFM, ACH, L/s, and m3/h.

Estimate room AC size in BTU per hour from square feet, ceiling height, sun, people, kitchen heat, insulation, and summer heat.

Estimate cooling load and a nominal mini-split size for one room or open zone using area, ceiling height, sun, and room use.

Estimate furnace BTU/h input size from home area, climate, insulation, AFUE, model sizes, and an optional quote comparison.

Calculate room AC capacity by area and conditions, or convert a documented whole-home cooling load into BTU/hr and tons.