HVAC Tools
Discover free HVAC tools, calculators, and converters for airflow, duct sizing, refrigerant calculations, load estimation, and HVAC system planning.
All Tools
Hvac Zoning System Cost Calculator - Estimate Costs
Estimate HVAC zoning project costs by considering zones, controls, dampers, installation needs, and system complexity for a clearer planning budget range.
Hvac Refrigerant Pressure Temperature Calculator Tool
Use the Hvac Refrigerant Pressure Temperature Calculator Tool to relate refrigerant pressure and saturation temperature for HVACR service and troubleshooting.
Hvac Garage Ventilation Calculator - Cfm Sizing
Calculate garage ventilation CFM from room dimensions and ACH. Estimate airflow requirements for HVAC exhaust planning and review key sizing assumptions.
Hvac Duct Takeoff Calculator Online | Duct Estimator
Calculate HVAC duct takeoff quantities from duct dimensions and project inputs. Review duct area and quantity results for estimating and field planning.
Hvac Fresh Air Ventilation Calculator - Ashrae
Calculate residential fresh-air ventilation rates using floor area and bedrooms with an ASHRAE 62.2-based method. Get a preliminary CFM or L/s airflow estimate.
Hvac Wire Size Calculator Ampage - Wire Gauge Tool
Use the HVAC Wire Size Calculator Ampage to estimate wire gauge from amps, check conductor ampacity, and review HVAC circuit limits for preliminary planning.
Hvac Fresh Air Intake Calculator - Outdoor Air Planning
Calculate HVAC outdoor airflow from space type, floor area, design population, and ventilation factors for fresh-air intake planning and design review.
Hvac Thermostat Compatibility Checker Tool Online
Check HVAC thermostat compatibility by comparing system type, wiring, stages, heat-pump controls, and power requirements before choosing a thermostat.
Hvac Refrigerant Leak Cost Calculator Estimate
Estimate HVAC refrigerant leak repair costs using service, refrigerant, and repair factors to budget potential leak diagnosis, repair, and recharge expenses.
Hvac Attic Fan Size Calculator Square Feet Calc - Cfm
Calculate attic fan CFM from square footage using the 0.7 CFM/sq ft baseline. Check minimum airflow, intake ventilation needs, and practical sizing limits.
Hvac Cooling Load Calculator For Commercial Kitchen
Estimate commercial kitchen HVAC cooling load from space, outdoor-air, and cooking heat inputs to support preliminary equipment sizing and design checks.
Hvac Return Air Duct Size Calculator By Btu - Free
Calculate HVAC return air duct size from BTU/h using a preliminary airflow and velocity method. Estimate CFM, duct area, and round diameter.
Hvac Maintenance Agreement Price Calculator - Toolhox
Calculate an HVAC maintenance agreement price from your service pricing assumptions and build a clearer starting point for contractor proposals and reviews.
Hvac Furnace Lifecycle Cost Comparison Tool Online
Compare furnace lifecycle costs online by evaluating upfront and ongoing ownership expenses to understand long-term heating-system costs before you decide.
Hvac Condensation Drainage Slope Calculator Online
Calculate HVAC condensate drain fall from run length and slope. Get the required vertical drop and check your planned drainage pitch before installation.