VZT Montér: HVAC ductwork
deriverge s.r.o. Utilities iPhoneiPadiPod touch
VZT Montér: HVAC ductwork is a free Utilities app for iPhone and iPad by deriverge s.r.o. Requires iOS 16.4. Updated November 2, 2026.
- Price
- Free
- on the App Store
- Size
- 53 MB
- Age 4+
- Updated
- Nov 2
- 2026 · v1.2.3
Screenshots
About VZT Montér: HVAC ductwork
VZT Montér is a calculator for the guys on the tools who build ductwork by hand. Nothing extra: put in what you measured with a tape, get out what you write on the duct. FREE - Planar offset on spiral duct: filler length, diagonal, centre distance. The elbow radius is taken from the diameter automatically. - Rectangular duct: offsets for radiused, mitred and vaned mitred elbows. - Conversions: round to rectangular, flow, room flow requirement. - Calculation history: tap an old calculation and carry straight on with it. - Work log: one tap to log the hours for a day, set your rate and see the month's earnings. First 14 days free. - Backup to a file. Everything works offline, no sign-up. PRO (one-time purchase, no subscription) - Rolling offset and offset around an obstacle. - Miter cuts and sheet development with a 1:1 print template. - Route design and pressure losses. - Custom elbow angles. - PDF without a watermark, unlimited jobs. - Unlimited work log, site photos and a PDF hours report for the foreman. Day mode is deliberately black and white so you can read it in the sun. Night mode for the plant room. Big buttons so it works with gloves on. Built with installers, the way installers work. If something does not fit, write to [email protected] and we will fix it.
What’s new
Version 1.2.3 · Updated November 2, 2026
Calculation fixes: - The template for the branch hole in the main pipe now has the correct shape and dimensions. - Segmented elbow shows the saw cut angle, the bend at each joint and the segment length on the centreline, inside and outside. - Duct run: branch losses per ASHRAE, new supply and extract switch, end sections are no longer always red. - Flow noise is rated in words by velocity. - Corrected help for offsets. - New Rate the app row in Settings.
App privacy
The developer, deriverge s.r.o., reported these privacy practices to Apple.
Data Not Linked to You
The following data, which may be collected but is not linked to your identity, may be used for the following purposes:
- Purchases: Purchase History
- Identifiers: Device ID
Used for: App Functionality
Alternatives to VZT Montér: HVAC ductwork
Looking for apps like VZT Montér: HVAC ductwork? Here are 6 similar apps on the App Store.
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DuctCalc: HVAC Ductulator
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Ductulator: HVAC Calculator
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HVAC Duct Calculator
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Karkulka PMDP
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ULT-Calculator
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Wolf Netzrechner
| App | Rating | Price | Last updated | Compare |
|---|---|---|---|---|
| VZT Montér: HVAC ductwork | – | Free | November 2, 2026 | |
| DuctCalc: HVAC Ductulator | – | Free | Oct 26, 2026 | Compare |
| Ductulator: HVAC Calculator | – | Free | Aug 8, 2026 | Compare |
| HVAC Duct Calculator | – | Free | Jun 24, 2026 | Compare |
| Karkulka PMDP | – | Free | Nov 1, 2024 | Compare |
| ULT-Calculator | – | Free | Dec 26, 2023 | Compare |
| Wolf Netzrechner | – | Free | Apr 25, 2024 | Compare |