HVAC Tools
Browse every free HVAC tool on Toolhox. No signup, no friction.
36 tools
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.
Hvac Refrigerant Line Set Length Pressure Drop Calculator
Calculate HVAC refrigerant line-set pressure drop from line length and supported system inputs. Use the result for preliminary refrigerant piping assessment.
Hvac System Zoning Requirements Calculator Online
Use this HVAC zoning requirements calculator for preliminary zone planning, review key zoning considerations, and organize a practical design reference.
Hvac Heat Recovery Ventilator Sizing Calculator
Calculate preliminary HRV ventilation airflow from residential sizing inputs. Estimate required airflow for HVAC design and verify final selection.
Hvac Ductwork Installation Cost Calculator By Linear Foot
Use Hvac Ductwork Installation Cost Calculator By Linear Foot to estimate HVAC duct installation costs from duct length and your per-foot rate for budgeting.
Hvac Condensate Pipe Size Calculator - Toolhox
Calculate HVAC condensate pipe size from equipment capacity and review minimum diameter ranges for preliminary condensate drain sizing.
Voltage Unbalance Calculator Hvac Tool Online - Toolhox
Calculate HVAC voltage unbalance from three phase voltages using the maximum-deviation method. Check the average, deviation, and percentage.
Page 2 of 2