Coolbench: HVAC Toolkit

All-in-one HVAC toolkit: live charging assistant, 30+ calculators, 150+ refrigerants, PT charts, EPA 608 prep and an AI Coach. Offline-first, one-time purchase.

Coolbench is the all-in-one toolkit for HVAC/R technicians — everything you reach for on a service call, in one fast, offline-first app.

CHARGING ASSISTANT • Live superheat and subcooling with instant ON-TARGET / ADD / RECOVER verdicts • Saturation auto-computed from real refrigerant data (CoolProp) • Save readings to job history and export a PDF report

30+ PRO CALCULATORS • Target superheat, compression ratio, condenser split • Airflow CFM, air velocity, duct sizing (round/rect/oval), static pressure • Heat load (Manual-J-lite), psychrometrics, enthalpy, grains, dew point • Electrical: voltage drop, wire size, 3-phase power, kW/HP/BTU • Gas input, hydronic GPM, EER, furnace temp rise and more

150+ REFRIGERANTS & PT CHARTS • Pressure–temperature tables with glide, bubble and dew points • GWP, oil type and replaces / replaced-by lineage for each refrigerant

EPA 608 EXAM PREP • Hundreds of original practice questions — Core and Type I / II / III • Study mode with instant feedback, plus a timed Exam mode with full review

ACADEMY • 10 field lessons: refrigeration cycle, charging, airflow, electrical, psychrometrics and more

AI COACH (online) • Ask HVAC questions and get clear, practical answers in the field • Focused on HVAC/R topics only

Coolbench works fully offline (except the AI Coach). No account, no ads, no tracking.

Coolbench Pro is a one-time purchase that unlocks all calculators, the full refrigerant set, premium EPA prep and the AI Coach. No subscription, ever.

Coolbench is an educational reference tool. Always verify against manufacturer specifications and follow all applicable codes.

——— Coolbench Pro is a one-time purchase — no subscription, no recurring charges.

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