HVAC Calculators
HVAC calculators for BTU sizing, duct design, refrigerant charge, heat load, and airflow calculations. Based on ASHRAE standards.
BTU Calculator
Calculate heating and cooling BTU requirements based on room size, insulation, climate zone, and occupancy.
Open calculatorDuct Size Calculator
Calculate required duct dimensions based on CFM airflow requirements and maximum velocity.
Open calculatorRefrigerant Charge Calculator
Estimate refrigerant charge based on system capacity, line set length, and refrigerant type.
Open calculatorHeat Load Calculator
Calculate building heat load using a simplified Manual J method for residential HVAC sizing.
Open calculatorCFM Calculator
Calculate cubic feet per minute (CFM) airflow based on room volume and required air changes per hour.
Open calculatorAir Changes Per Hour Calculator
Calculate the number of air changes per hour (ACH) based on room volume and airflow rate.
Open calculatorCooling Capacity Calculator
Calculate cooling capacity in tons of refrigeration based on BTU load and system efficiency.
Open calculatorHVAC Duct Pressure Calculator
Calculate static pressure loss in ductwork based on duct dimensions, airflow, and fitting count.
Open calculatorHumidification Calculator
Calculate humidification requirements based on space volume, desired humidity, and outdoor conditions.
Open calculatorEnergy Efficiency Ratio Calculator
Calculate EER and SEER ratings for HVAC equipment to compare energy efficiency.
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