# Thermal Efficiency Calculator — From FIS

> Fired heater thermal efficiency calculator based on flue gas data. (iPhone/iPad app by Stand Up Apps, Inc..)

- Source: https://appshunter.io/ios/app/thermal-efficiency-calculator/id1523372508 (this page in markdown: same URL + `.md`)
- Developer: [Stand Up Apps, Inc.](https://appshunter.io/developer/344006549)
- Category: Reference, Utilities
- Price: Free
- Rating: 5.00/5 from 2 App Store ratings
- Age rating: 4+
- Requires: iOS 13.5 · 1 MB
- Languages: English
- Released: 2020-07-14
- Data updated: 2026-06-04
- Monetization: free
- User reviews in markdown: https://appshunter.io/ios/app/thermal-efficiency-calculator/id1523372508/reviews.md

## What is Thermal Efficiency Calculator?

This app calculates the thermal efficiency of your fired heater using stack flue gas temperature and excess Oxygen in the flue gas. 

The thermal efficiency is calculated using the LHV basis of the fuel gas. It is a simplified calculation and you do not need to enter the fuel gas composition. It also indicates the energy savings potential of your heater. You can use it to monitor your heaters and improve their efficiency by reducing flue gas temperature and excess Oxygen needed. 

Our company, Furnace Improvements Services, can help you realize the energy savings potential of your heater. Please contact us at info@heatflux.com and visit our website at www.heatflux.com.

## Key features

- Calculate thermal efficiency
- Uses stack flue gas temperature
- Uses excess Oxygen in flue gas
- Calculates based on LHV fuel gas
- Estimates energy savings potential
- Monitor and improve heater efficiency


## Frequently asked questions about Thermal Efficiency Calculator

### What is the Thermal Efficiency Calculator?

The Thermal Efficiency Calculator is a free reference app designed to calculate the thermal efficiency of fired heaters. It uses stack flue gas temperature and excess oxygen to estimate energy savings potential.

### Does the Thermal Efficiency Calculator require fuel gas composition?

No, the Thermal Efficiency Calculator performs a simplified calculation and does not require you to enter the fuel gas composition. It uses the LHV basis of the fuel gas.

### How can the Thermal Efficiency Calculator help improve heater efficiency?

The app indicates the energy savings potential of your heater. You can use it to monitor your heaters and improve their efficiency by focusing on reducing flue gas temperature and excess oxygen.

### What devices is the Thermal Efficiency Calculator available on?

The Thermal Efficiency Calculator is available on iPhone and iPod devices, as indicated by its supported devices list.

### When was the Thermal Efficiency Calculator last updated?

The Thermal Efficiency Calculator was last updated on July 28, 2020, with version 1.0.2.

### What is the age rating for the Thermal Efficiency Calculator?

The Thermal Efficiency Calculator has an age rating of 4+, making it suitable for a wide range of users.

### How accurate is the Thermal Efficiency Calculator?

The app provides a simplified calculation for thermal efficiency. While it offers an estimate of energy savings potential, users may wish to consult with professionals for highly precise industrial applications.

### Does the Thermal Efficiency Calculator have ads?

No, the Thermal Efficiency Calculator is ad-free, as indicated by its 'hasAds' flag being false.

## Version history (last 3 releases)

### 1.0.2 — 2020-07-28

Bug fixes and performance enhancements

### 1.0.1 — 2020-07-21

Bug fixes and performance enhancements

### 1.0 — 2020-07-14

No release notes.

## Apps similar to Thermal Efficiency Calculator

| App | Rating | Price | Category |
| --- | --- | --- | --- |
| [Fluid Mechanics Pack](https://appshunter.io/ios/app/fluid-mechanics-pack/id533817127) | 5.0 (12) | $3.99 | Reference |

## More apps by Stand Up Apps, Inc.

- [Ergonomics](https://appshunter.io/ios/app/ergonomics/id547689680)
- [Modern Meat](https://appshunter.io/ios/app/modern-meat/id1522698602)
- [Longform Reader](https://appshunter.io/ios/app/longform-reader/id1524522355)
- [MCI Headway](https://appshunter.io/ios/app/mci-headway/id1528218891)

All apps by Stand Up Apps, Inc.: https://appshunter.io/developer/344006549

---

*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 2026-06-04.*