Utilities · iPhone & iPad
Coolbench: HVAC Calculator
The offline HVAC/R toolkit for every service call.
Download on the App StoreRequires iOS 17.0+
Coolbench is the all-in-one toolkit for HVAC/R technicians: a charging assistant, PT charts for 150+ refrigerants, 37 calculators and EPA 608 prep, in one fast offline app. No login, no ads, no subscription.
What it does
Charging assistant
Live superheat and subcooling with an instant On target, Add or Recover verdict.
PT chart, 150+ refrigerants
Glide, bubble and dew points in psig or kPa, °F or °C, with GWP and oil type.
37 HVAC calculators
Duct sizing, CFM, static pressure, load, psychrometrics, voltage drop and more.
Field tools
Data-plate decoder, fault codes, evacuation assistant and an A2L toolkit.
Service reports
PDF reports with your logo, readings, photos and signatures.
EPA 608 prep
800+ original practice questions, timed exams and a 100-question mock.
Who it is for
HVAC/R technicians, apprentices and students preparing for EPA 608.
Price
Free to download. Coolbench Pro is a one-time purchase — no subscription, ever.
Privacy
- No account, no ads, no tracking
- Fully offline except the AI Coach
- English and Spanish
Use it as
HVAC calculatorsuperheat calculatorsubcooling calculatorrefrigerant PT chartR-410A PT chartR-454B PT chartduct calculatorHVAC load calculatorEPA 608 practice testHVAC fault codes
Questions
Is there an HVAC app that works in a basement with no signal?
Coolbench works fully offline — charging assistant, PT charts and calculators — except the optional AI Coach.
Does Coolbench work without signal?
Yes. Everything works offline except the AI Coach.
Which refrigerants are covered?
More than 150, including R-410A, R-454B, R-32, R-22 and R-290.
Is there a subscription?
No. Coolbench Pro is a one-time purchase.
Is the certificate an EPA certification?
No. Completion certificates are training records, not EPA certification.
Coolbench
Privacy Policy · Terms of Use · Support
An educational reference tool. Always verify against manufacturer specifications and applicable codes.
