# Navisizer vs TEC Excelsior HVAC Pro+

The clearest difference is rating: TEC Excelsior HVAC Pro+ at 4.4 against Navisizer's 2.4. TEC Excelsior HVAC Pro+ also leads on update cadence (every 2 months vs every 4 months). Navisizer's advantage is monetization model (free vs ad-supported). On price, ratings volume, ads and in-app purchases there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

TEC Excelsior HVAC Pro+ holds the better App Store score, 4.4 against 2.4. Both are backed by a comparable volume of ratings — 26 and 12 respectively.

Navisizer ships an update every 4 months, TEC Excelsior HVAC Pro+ every 2 months. The most recent releases landed on June 1, 2026 and August 9, 2026 respectively.

## The numbers

| Metric | Navisizer | TEC Excelsior HVAC Pro+ |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [2.4 (26 ratings)](https://appshunter.io/ios/app/navisizer/id1327385997/reviews) | **[4.4 (12 ratings)](https://appshunter.io/ios/app/tec-excelsior-hvac-pro-plus/id1610400044/reviews)** |
| Number of ratings | **26** | 12 |
| Positive reviews | 12.5% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 4 months | **Every 2 months** |
| Monetization | **Free** | Ad-supported |
| Size | 21 MB | 163 MB |
| Requires iOS | 17.2 | **16.0** |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Navien, Inc.](https://appshunter.io/developer/1327385996) | [Watsco, Inc.](https://appshunter.io/developer/510378878) |

## What reviewers say

### Navisizer

[App page](https://appshunter.io/ios/app/navisizer/id1327385997)

This app helps size domestic hot water heating systems for residential and commercial use. It calculates operating costs, savings, and generates comprehensive job specifications for Navien NPE Series tankless water heaters.

**Highlights:** Residential system sizing, Operating cost and savings calculation, Commercial application sizing (ASHRAE Hunter Curve), Tankless and tankless with storage solutions, Comprehensive job specification output, Save, print, or email system specs

**Features:** macOS Compatibility

**In-app purchases:** none


### TEC Excelsior HVAC Pro+

[App page](https://appshunter.io/ios/app/tec-excelsior-hvac-pro-plus/id1610400044)

This app provides HVAC professionals with quick access to product information, pricing, and availability. It includes tools for searching equipment, verifying warranties, and accessing technical documents, streamlining on-site work.

**Highlights:** View pricing and order status, Real-time product availability, Search HVAC models and parts, Verify warranty and submit claims, Access spec sheets and diagrams, HVAC calculators (PT, Sub-Cool, Superheat), Branch locator and directions

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Navisizer free?

Navisizer is free to download, with no in-app purchases.

### Is TEC Excelsior HVAC Pro+ free?

TEC Excelsior HVAC Pro+ is free to download, with no in-app purchases.

### Which has better reviews, Navisizer or TEC Excelsior HVAC Pro+?

TEC Excelsior HVAC Pro+ is rated higher. Navisizer averages 2.4 out of 5 from 26 ratings, while TEC Excelsior HVAC Pro+ averages 4.4 from 12 ratings.

### Do Navisizer or TEC Excelsior HVAC Pro+ have ads?

Neither Navisizer nor TEC Excelsior HVAC Pro+ shows ads.

### Which is updated more often, Navisizer or TEC Excelsior HVAC Pro+?

Navisizer ships an update every 4 months, and TEC Excelsior HVAC Pro+ every 2 months. Most recently, Navisizer was updated on June 1, 2026 and TEC Excelsior HVAC Pro+ on August 9, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*