FridgeCalc

HVAC Calculations & Refrigerant Data

Refrigerant P-T Charts

Saturation pressure-temperature data for R-410A, R-22, R-134a, R-32, and 6 more refrigerants. Use for superheat and subcooling calculations.

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Duct Sizing Calculator

Calculate air velocity, friction loss, and noise level for round ducts from 4" to 24" at any CFM.

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BTU Load Calculator

Estimate heating and cooling load by square footage and IECC climate zone. Based on ACCA Manual J methodology.

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SEER Rating Comparison

Compare annual energy cost and savings between SEER ratings from 13 to 25.

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Refrigerant Charge Calculator

Calculate additional refrigerant charge based on lineset length and liquid line diameter.

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Disclaimer: This tool provides estimates for informational purposes only. Always verify calculations with a licensed professional and consult your local building department before making decisions based on these results.