Cooling & Load Sizing Calculators
Size residential air conditioning equipment, heat pumps, and ductless mini-splits adhering strictly to ACCA Manual J (8th Edition) and Manual S equipment selection protocols.
BTU Heating & Cooling Load Calculator
Estimate whole-home and room heating and cooling loads (BTU/hr and Tons) based on square footage, climate zone, insulation quality, and window exposure.
AC Tonnage & Room Capacity Calculator
Match room and home square footage to required air conditioning tonnage (1.5 to 5.0 Tons) with regional climate adjustments and SEER2 operating cost modeling.
HVAC Model Number Tonnage Decoder
Instant HVAC model number decoder. Enter the model string on your Carrier, Trane, Goodman, Lennox, Rheem, or York nameplate to find its tonnage and BTU rating.
Mini-Split Multi-Zone Sizing Calculator
Size multi-zone ductless mini-split systems. Match room heat loads to indoor wall/cassette heads (6k to 24k BTU) and outdoor multi-port condensers.
ACCA Manual J / Manual S Thermal Load & Sizing Hierarchy
Building envelope sensible heat gains, solar radiation, and latent occupant loads mapped to nominal equipment capacity.