Blowpipe Lite by Silverglance Software enables rapid sizing of low-flowrate HVAC pipes (max 20 gpm / 1 kg/s).
Calculations also include pump motor sizes, pipe expansion, weight and heat transfer. The app may be upgraded to the full version, with no restrictions, by in-app billing.

Blowpipe Lite operates in either metric or imperial units, using calculation methods common to UK, Europe and USA, and with international pipe data.

// Option A //

To download Blowpipe HVAC Lite mod from HappyMod.com.
You need enable the option "Unknown Sources".
1. Click on the above link to download Blowpipe HVAC Lite mod APK.
2. Save the file in your device Downloads folder.
3. Now tap on Install and wait for the installation to finish.
4. Once it is done, open the game and start playing it right away.

// Option B //

To download Blowpipe HVAC Lite from HappyMod APP, you can follow this:
1. Open your browser and download the HappyMod APK file from HappyMod.com - the only official website of HappyMod.
2. Open Android Settings and go into Privacy or Security.
3. Tap the option to Allow Unknown Sources and enable it.
4. Go to your Android downloads and tap the APK file.
5. Follow the directions on the screen to install it.
6. Search Blowpipe HVAC Lite in HappyMod App.