Navisizer vs TEC Excelsior HVAC Pro+
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Navisizer
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.
- 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
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NaviSizer is designed to assist with sizing of domestic hot water heating systems with Navien NPE Series tankless water heaters. For residential applications, NaviSizer offers system sizing, calculation of operating cost and savings, and provides a comprehensive output to be used as a job spec. For commercial applications, NaviSizer uses ASHREA Hunter Curve calculations to size a broad range of applications. Both tankless and tankless with storage solutions are offered along with a comprehensive system spec that can be saved, printed, or emailed.
TEC Excelsior HVAC Pro+
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.
- 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
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Temperature Equipment Co and National Excelsior’s mobile app is your HVAC “Easy Button”. It can make your life easier and save time by providing access to product information and useful tools whether you’re on-site, in the drive-thru, or just sitting at home watching TV. Features & Benefits You can: * link to your Temperature Equipment Co and National Excelsior account to view your pricing and order status data, as well as real-time product availability at your preferred branch and other nearby Temperature Equipment Corporation branches * easily find Temperature Equipment Co and National Excelsior locations, hours, & phone numbers. Get driving directions through your favorite mapping app * search for HVAC equipment models and view the parts list and superseded parts. Scan QR codes or UPC Bar Codes for faster product lookups * also search by system needs to find AHRI matched systems * verify warranty registrations, get related data, and even submit warranty claims while in the field * view spec sheets, wiring diagrams, installation guides, consumer literature, etc. for Temperature Equipment Corporation products * receive push notifications of special offers & promotions from Temperature Equipment Co and National Excelsior * access multiple useful calculators, including the PT calculator, Sub-Cool calculator, Superheat calculator, Existing Duct calculator, and New Duct calculator * quickly access the flashlight tool to light up attics, closets and equipment while you work Temperature Equipment Co and National Excelsior’s mission is to deliver the quality HVAC products you need, when you need them, and provide expert technical support. Temperature Equipment Co and National Excelsior are the HVAC professionals’ supplier of choice, and we work hard every day to earn and keep your trust
Screenshots
Verdict
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.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
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.
| Parameter | Navisizer | TEC Excelsior HVAC Pro+ |
|---|---|---|
| Price | Free | Free |
| Rating | 2.4 (26 ratings) | 4.4 (12 ratings) — better |
| Positive reviews | 12.5% of reviews | — |
| Number of ratings | 26 — better | 12 |
| Update frequency | Every 4 months | Every 2 months — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free — better | Ad-supported |
| Devices | iPhone, iPad | iPhone, iPad |
| Requires iOS | 17.2 | 16.0 — better |
| Further details — not scored | ||
| Size | 21 MB | 163 MB |
| Age rating | 4+ | 4+ |
| Developer | Navien, Inc. | Watsco, Inc. |
Customer experience
Navisizer
TEC Excelsior HVAC Pro+
In-app purchases
Navisizer
No in-app purchases
TEC Excelsior HVAC Pro+
No in-app purchases
Questions
Is Navisizer free?
Is TEC Excelsior HVAC Pro+ free?
Which has better reviews, Navisizer or TEC Excelsior HVAC Pro+?
Do Navisizer or TEC Excelsior HVAC Pro+ have ads?
Which is updated more often, Navisizer or TEC Excelsior HVAC Pro+?
Other comparisons
