# Residential HVAC Designer Pro — Permit Ready HVAC Designer

> Permit Ready HVAC Designer (iPhone/iPad app by Yuhsiu Lai.)

- Source: https://appshunter.io/ios/app/residential-hvac-designer-pro/id6779082106 (this page in markdown: same URL + `.md`)
- Developer: [Yuhsiu Lai](https://appshunter.io/developer/433114647)
- Category: Utilities, Productivity
- Price: $2.99 (on sale, was $7.99)
- Age rating: 4+
- Requires: iOS 17.0 · 3 MB
- Languages: American English
- Released: 2026-06-16
- Data updated: 2026-06-25
- User reviews in markdown: https://appshunter.io/ios/app/residential-hvac-designer-pro/id6779082106/reviews.md

## What is Residential HVAC Designer Pro?

Design complete residential HVAC systems from start to finish. Residential HVAC Designer Pro guides you through a professional 14-step design workflow using ACCA Manual J, Manual S, and Manual D calculation methods - the same standards used by licensed HVAC engineers.
WHAT THE APP DOES
Enter your project details step by step: building dimensions, insulation levels, window data, climate zone, room layout, internal loads, and infiltration. The app automatically calculates heating and cooling loads for every room, selects appropriately sized equipment, designs your duct system, and generates a complete permit package.
KEY FEATURES

14-step guided design wizard
Manual J heating and cooling load calculations per room
Manual S equipment selection with sensible heat ratio matching
Manual D duct sizing with velocity and pressure drop checks
Supply register and return grille scheduling
Zoning system support
Complete permit package with all calculation reports
Duct layout drawings and riser diagrams
Material takeoff with quantities
Energy code compliance notes
Save and manage multiple projects

WHO THIS APP IS FOR
Residential HVAC Designer Pro is built for HVAC contractors, mechanical engineers, energy auditors, building inspectors, and homeowners who want to understand how their HVAC system is sized and designed. Whether you are designing a new system, replacing existing equipment, or checking a contractor's work, this app gives you the tools professionals use.
DISCLAIMER
This app is intended as a design aid and educational reference. All calculations should be reviewed by a licensed mechanical engineer or qualified HVAC professional before construction or equipment purchase. Results are based on user-entered data and standard ACCA methodology. The developer makes no warranty regarding the accuracy or completeness of any calculation output.


## Version history (last 1 release)

### 1.1 — 2026-06-16

No release notes.

## More apps by Yuhsiu Lai

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- [Battery Current Simulator](https://appshunter.io/ios/app/battery-current-simulator/id488430945)

All apps by Yuhsiu Lai: https://appshunter.io/developer/433114647

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-06-25.*