FieldCalc HVAC
Offline HVAC calculator: R-454B PT, superheat, duct, load
FieldCalc HVAC launched on July 15, 2026 with 8 votes, #2,235 of 24,623 launches that month and more than 90% of that year's launches.
What it does
Offline HVAC field calculator with R-454B PT charts, superheat/subcooling, duct sizing, load estimates & psychrometrics. No subscription, no ads, no tracking. Free PT charts (R-454B/R-32/R-410A) + unit converter. Pro: $9.99 one-time for all calculators, 13 refrigerants & PDF export. 100% offline — built for techs on the roof. Feedback welcome!
Download HVAC Calculator - FieldCalc by 静 李 on the App Store. See screenshots, ratings and reviews, user tips, and more apps like HVAC Calculator - FieldCalc.
Free · In‑App Purchases · Designed for iPhone. Not verified for macOS. Utilities Developer 静 李 Language EN English Size 5.2 MB iPhone R-410A is out, R-454B is in. Get PT charts, superheat & subcooling, duct sizing, psychrometrics & load estimates — all offline, one app. Built for HVAC technicians. FieldCalc HVAC is the all-in-one field calculator for HVAC technicians. From R-454B PT lookups to duct sizing and load estimates — everything you need, working offline, right in your pocket. ► R-454B READY The industry is switching from R-410A to R-454B. Get instant pressure-temperature data for R-454B, R-32, R-410A, plus 10 more refrigerants (R-134a, R-22, R-404A, R-407C, R-448A, R-449A, R-507A,…from apps.apple.com
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