HVAC Load Calculator

BTU, Tonnage & Heat Pump Sizing

Quick facts

First listed: Saturday 31 October 2026
Link: hvacloadcalculator.app
In its own words: HVAC Load Calculator for iPhone: size the house, not a rule of thumb. Heating and cooling BTU/h, tons, duct sizes and a PDF for the customer.
On its homepage: A guess on the size ends in a callback
The rule of thumb says 3.7 ton. This house needs 2.
Size it, prove it, close it
Show them where the heat gets in
Never put in a unit that is too big
No more hot back bedroom
Leave a PDF that makes the case
Get HVAC Load on your iPhone
Based in: Germany
Pricing hints: Free trial
On the App Store: Utilities

Free

First released 2 Nov 2026

Last updated 2 Nov 2026

As shown on the App Store, 3 Nov 2026.
Find it elsewhere: App Store

Screenshot of the homepage of hvacloadcalculator.app — Screenshot of the homepage · hvacloadcalculator.app

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