HVAC tools & calculators

Inputs and results

Service agreement generator

Create a printable service scope using your approved terms.

Service pricing calculator

Turn labor, materials and overhead into a price at your chosen margin.

Measured duct airflow

Convert average measured duct velocity to approximate airflow.

Temperature split calculator

Record the difference between return and supply air.

Equipment energy cost

Estimate electricity cost from measured power and run time.

Minimum service-call price

Build a visit price from labor, travel, materials and desired margin.

One-time job pricing

Price repairs and one-time services with a visible cost allowance.

Repair or replace cost comparison

Compare annualized repair and replacement scenarios.

Room airflow · CFM

Estimate airflow from room volume and your specified air-change target.

Air changes per hour

Calculate ACH from measured airflow and room dimensions.

Round duct area calculator

Calculate equivalent round diameter from airflow and a specified velocity.