Technician tools
HVAC field tools
Quick field calculations for service work. Use the results as diagnostic aids, then verify equipment-specific limits and procedures against the manufacturer literature.
Free service-call worksheet
A reusable text worksheet for complaints, readings, confirmed findings, and follow-up.
Download the free worksheet (.txt)Service report builder demo
Try an editable example before upgrading. Pro adds job reports, maintenance worksheets, and export options.
3-phase imbalance calculator
Calculate voltage and current imbalance from three field readings.
Superheat & subcooling calculator
Calculate both values, compare them with optional OEM targets, and review the combined pattern.
Airflow, CFM & static pressure
Calculate duct airflow, tonnage-based airflow targets, and total external static pressure.