Coolbench: HVAC Calculator

Coolbench is the all-in-one toolkit for HVAC/R technicians: everything you reach for on a service call, in one fast, offline app. No login, no ads, no subscription. CHARGING ASSISTANT (SUPERHEAT & SUBCOOLING) • Live superheat and subcooling with an instant ON TARGET / ADD / RECOVER verdict • Piston target superheat from indoor wet bulb and outdoor temperature (Title 24 table); TXV target from the nameplate subcooling • System Check: possible causes (overcharge, undercharge, restriction, low airflow, dirty condenser, TXV bulb, non-condensables) from both readings • Saturation from refrigerant data checked against manufacturer PT charts, for R-410A, R-454B, R-32, R-22, R-290 and more • Save readings to your job history and export a PDF report FIELD TOOLS • Data plate decoder: scan or type a serial to get the manufacture date, age and tonnage (Carrier, Trane, Lennox, Goodman, Rheem, York and more) • Fault codes for gas furnaces and ductless mini-splits, with likely causes and first checks • Evacuation assistant: micron log, timed decay test, moisture vs leak verdict • A2L toolkit for R-454B and R-32: charge threshold check, room-size estimate, service checklist • Customer service reports: PDF with your logo, readings, photos and signatures • Refrigerant log for EPA recordkeeping, with CSV export REFRIGERANT PT CHART FOR 150+ REFRIGERANTS • Pressure-temperature tables with glide, bubble and dew points, in psig or kPa and °F or °C • GWP, oil type and replaces / replaced-by lineage for every refrigerant 37 HVAC CALCULATORS • Superheat calculator, target superheat, compression ratio, condenser split • Duct calculator (round, rectangular, oval), airflow CFM, static pressure • HVAC load calculator (Manual J-lite), psychrometrics, enthalpy, dew point • Electrical: voltage drop, wire size, 3-phase power, kW / HP / BTU • Gas input, hydronic GPM, EER, furnace temperature rise and more • Voltage imbalance, recovery cylinder fill, line-set charge, annual leak rate, SEER to SEER2 EPA 608 CERTIFICATION PREP • 800+ original practice questions for Core and Type I / II / III • Study mode with instant explanations, timed Exam mode, Review my mistakes • Universal mock exam: 100 questions, graded section by section like the real test • Exam readiness score and per-section accuracy HVAC TRAINING ACADEMY • 18 lessons: refrigeration cycle, superheat and subcooling, charging, airflow, electrical basics, psychrometrics, A2L refrigerants, heat pumps, mini-splits, evacuation, brazing, 2026 refrigerant rules, gas furnaces, compressor diagnosis • Quick check-yourself quiz after every lesson • 120 flashcards with spaced repetition and a searchable HVAC glossary • Interactive refrigeration-cycle diagram • Daily study streak and a shareable completion certificate AI COACH (online) • Ask air conditioning and refrigeration questions and get clear, practical answers in the field Works on iPhone and iPad, in English and Spanish (Español), fully offline except the AI Coach. No account, no ads, no tracking. Pick your own accent color. Coolbench Pro is a one-time purchase that unlocks every calculator, the full refrigerant set, the Advanced Academy, all flashcard decks, the Universal mock exam and the AI Coach. No subscription, ever. Coolbench is an educational reference tool. Always verify against manufacturer specifications and follow all applicable codes. Completion certificates are training records, not EPA certification. Terms of Use: https://sites.google.com/view/terms-of-use-coolbench-hvac-to/home Privacy Policy: https://sites.google.com/view/privacypolicycoolbenchhvactool/home