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FieldCalc HVAC
Offline HVAC calculator: R-454B PT, superheat, duct, load
11 followers
Offline HVAC calculator: R-454B PT, superheat, duct, load
11 followers
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!
Offline PT charts for R-454B are exactly what I needed on a job site where the signal keeps dropping. The psychrometrics calc feels snappy and straightforward, no clutter or upsells in the way.
R-454B charts built in already is huge, saves me from digging through outdated pamphlets. One-time price feels right for something offline and actually built for the field.
@glenhacouljo4x Really glad to hear that — especially the R-454B part. That was the
whole reason I started building this. Digging through paper charts
on a hot roof is the worst, and every app I found was either missing
R-454B entirely or buried it behind 80 other refrigerants.
If you spot any PT values that don't match your manifold readings,
let me know and I'll verify against the source data. What refrigerants
are you working with most these days?
Really appreciate that the whole thing actually works offline. Most of these calculators want you to sign in or hit a paywall before you can even pull up a PT chart on a rooftop with no signal. Solid call building it for the people using it.