Support

Write to support@hvacloadcalculator.app. Tell us your iPhone model, your iOS version and what happened. You can also tap "Send feedback" in the app Settings.

How to

Set the weather

On the Load screen, open Climate. Type a ZIP code, tap "Use my location", or search a town. You can also type your own design temperatures.

Fill the insulation from the year the house was built

In the Insulation section, tap "Fill from the year the house was built" and pick the period. The app fills in typical walls, attic, windows, air leaks and ducts. You can still change each one.

Save a job

Tap Save in the job card. Your jobs are in the Jobs tab. Tap "Save a copy" to start from a job you already have.

Make the PDF

Add your company and logo in Settings, under "Your company and logo". Add the client under "Client and report details". Then tap Report on the Load screen.

Restore purchases

Open Settings and tap "Restore purchases". Use the same Apple ID that bought the subscription.

Cancel the subscription

Apple handles the subscription. On your iPhone open Settings, tap your name, tap Subscriptions, pick HVAC Load and tap Cancel. In the app you can also tap "Manage subscription" in Settings.

Erase your data

In the app, open Settings and tap "Erase everything on this phone". Your jobs, client details and logo are kept only on the phone, so nothing is left to erase on our side.

Not in the app yet

iCloud sync, LiDAR room scanning, metric units and Canada, and an Android app. The app is for iPhone only.

Free tools on the web

Try the BTU estimate, the duct size tool or the Manual J guide.