Best Gas Ventilation Calculator Uk Apps

212+ iOS apps curated and reviewed

4.4 avg rating
18 free apps
Updated July 2026

Whether you're new to gas ventilation calculator uk or looking for an upgrade, our curated collection of 212+ iOS apps has something for everyone. Each app is reviewed and rated by real users, helping you make an informed decision.

Compare top Gas Ventilation Calculator Uk Apps (July 2026)

#AppPriceRatingAdsIn-App PurchasesUpdated
1Gas Ventilation Calculator UKGas Ventilation Calculator UK$4.99NoNoJul 2026
2GB Gas Heat Input CalculatorGB Gas Heat Input CalculatorFreeNoNoMay 2026
3HVACR Check & ChargeHVACR Check & ChargeFree4.8★ (17K)NoNoAug 2026
4Gas Engineer Software - GESGas Engineer Software - GESFreeNoYesAug 2026
5Gas App UkGas App UkFree3.0★ (2)NoYesAug 2026
6OneCalc: All-in-one CalculatorOneCalc: All-in-one CalculatorFree4.6★ (4.8K)YesNoAug 2026
7Gas Rate CalculatorGas Rate Calculator$4.99NoNoJul 2026
8Rapid Vent CalculatorRapid Vent CalculatorFree5.0★ (45)NoNoJul 2026

Top Picks for Gas Ventilation Calculator Uk

Gas Ventilation Calculator UK#1

Gas Ventilation Calculator UK by Mr Combi Training

Editor's Choice
📊 Productivity
0.0(0 ratings)
$4.99
Gas Ventilation Calculator UK screenshot 1
Gas Ventilation Calculator UK screenshot 2
Gas Ventilation Calculator UK screenshot 3
Gas Ventilation Calculator UK screenshot 4
Gas Ventilation Calculator UK screenshot 5

Calculate required ventilation sizes for various domestic gas appliances up to 70kW. Supports flueless, open flue, and room-sealed appliances, including multiple rooms and appliances. Also features an extractor fan and vent size calculator.

GB Gas Heat Input Calculator#2

GB Gas Heat Input Calculator by GB-GAS.CO.UK

Strong Contender
💼 Business
0.0(0 ratings)
Free
GB Gas Heat Input Calculator screenshot 1
GB Gas Heat Input Calculator screenshot 2
GB Gas Heat Input Calculator screenshot 3
GB Gas Heat Input Calculator screenshot 4

This tool simplifies calculating natural gas heat input and gas rates for installations. It allows users to time their meter, input readings, and get instant results, eliminating the need for manual charts or complex calculations.

HVACR Check & Charge#3

HVACR Check & Charge by Copeland LP

PT Charts Superheat Subcooling
Worth Considering
🔍 Reference
4.8😊(17K ratings)
Free
HVACR Check & Charge screenshot 1
HVACR Check & Charge screenshot 2
HVACR Check & Charge screenshot 3
HVACR Check & Charge screenshot 4
HVACR Check & Charge screenshot 5
HVACR Check & Charge screenshot 6

This app provides an instant mobile refrigerant charge calculator for HVACR applications. It supports various refrigerants and allows users to calculate the correct system charge based on superheat, subcooling, or airflow, along with environmental conditions.

What We Love

  • 🚀 Convenient
  • 🚀 Great program
  • 🚀 Reliable app
  • 🚀 Easy and quick charging reference

Room to Improve

  • 🐛 Pressure settings not helpful
  • 🔒 Concerning privacy policy
  • 🐛 Restricted temperature range

More Gas Ventilation Calculator Uk apps to explore

4
Gas Engineer Software - GES
Gas Engineer Software - GES
Gas Engineer Software - GES
For gas, oil & plumbing pros
Free

This comprehensive app helps gas, oil, and plumbing professionals streamline their business operations. It allows for the creation of industry-specific certificates, issuance of quotes and invoices, and efficient job scheduling. Manage your team, customers, and finances from any device, anywhere, saving time and boosting revenue.

Create industry certificatesIssue quotes and invoicesSchedule jobs with calendar
💼 Business
(0)
free with in-app purchases
5
Gas App Uk
Gas App Uk
Gas App Uk
by Gas App Uk Limited
Free

This app provides essential office tools, reference materials, and a community forum for gas engineers in the UK. It includes forms, invoices, quotations, a library of manuals, and a place to connect with industry peers for advice and support.

Office tools (forms, invoices, quotations)Fault finding forumCommunity Break Time forum
💼 Business
(2)
free with in-app purchases
6
OneCalc: All-in-one Calculator
OneCalc: All-in-one Calculator
OneCalc: All-in-one Calculator
Calculates everything. Try it.
Free

This app offers a comprehensive suite of over 40 calculators and unit converters for various needs, including finance, health, construction, and everyday math. It features standard, scientific, and specialized calculators for tasks like loan amortization, currency conversion, and material estimation.

Over 40 calculators and unit convertersStandard and scientific calculator functionsFinancial calculators (interest, loan, currency)
📊 Productivity
(4.8K)
free with in-app purchases
7
Gas Rate Calculator
Gas Rate Calculator
Gas Rate Calculator
by Stephen Lalor
$4.99

Calculate domestic gas rates for Imperial and Metric gas meters up to 16 cubic metres. This tool is designed for Gas Service Engineers and Installers, offering the ability to email results directly.

Calculates Imperial gas ratesCalculates Metric gas ratesSupports meters up to 16 cubic metres
💼 Business
(0)
free
8
Rapid Vent Calculator
Rapid Vent Calculator
Rapid Vent Calculator
Medical Ventilator Calculator
Free

This medical app assists healthcare professionals in calculating essential ventilator settings and medication dosages for critical care. It provides rapid, accurate results for paramedics, respiratory therapists, nurses, and doctors, streamlining patient management.

Effortless ventilator settings calculationRapid results for quick decision-makingRSI medication dosage assistant
🏥 Medical
(45)
free
9
QuickMPG - gas mileage calculator
QuickMPG - gas mileage calculator
QuickMPG - gas mileage calculator
by Steven Romej
Free

Easily calculate your vehicle's gas mileage on a single screen. Track your fuel efficiency over time with historical data and quick comparison features. Ideal for anyone needing a straightforward way to monitor MPG.

One-screen calculationHistorical MPG dataQuick comparison of ratings
🔧 Utilities
(10)
free
10
Gas Converter
Gas Converter
Gas Converter
by Linde GmbH
Free

Easily convert volumetric to weight-based units for 15 industrial gases. Get additional information like enthalpy and boiling points. Simple three-step process for quick calculations.

Convert volumetric to weight unitsSupports 15 industrial gasesProvides enthalpy and boiling point data
📊 Productivity
(171)
free
11
Duct Calculator - DuctCalc
Duct Calculator - DuctCalc
Duct Calculator - DuctCalc
HVAC Sizing & Psychrometric
Free

This app provides professional HVAC duct sizing and psychrometric calculations in a single tool. It offers detailed calculations for various duct types and materials, along with comprehensive humid air property analysis. Designed for HVAC professionals, it replaces traditional ductulators with accurate digital functionality.

Duct sizing for round, rectangular, and flexible ductsFittings pressure drop calculationPsychrometric analysis with interactive chart
🔧 Utilities
(7)
free with in-app purchases
12
Lomanco Vent Tools
Lomanco Vent Tools
Lomanco Vent Tools
by Lomanco, Inc.
Free

Calculate the number of roof vents needed for a balanced attic ventilation system. This app helps determine intake and exhaust options, roof pitch, and soffit panel requirements. It also provides product information and tools for Whirlybird installations.

Ventilation CalculatorSoffit Panel ToolWhirlybird Pitch Tool
🔍 Reference
(11)
free
13
Pipe Flow Wizard - Calculator
Pipe Flow Wizard - Calculator
Pipe Flow Wizard - Calculator
Flow Rate & Pressure Loss Calc
Free

Calculate fluid flow rate and pressure loss in pipes. This app helps engineers determine pipe diameter, maximum pipe length, and friction loss for both liquid and gas flows, including fittings and elevation changes. Results can be shared as Excel or PDF reports.

Flow rate calculationsPressure loss calculationsPipe diameter sizing
🔧 Utilities
(101)
free with in-app purchases
14
P-T Calculator
P-T Calculator
P-T Calculator
by National Refrigerants, Inc.
Free

This tool simplifies HVAC/R technician tasks by calculating pressure/temperature relationships, superheat, and subcool. It automatically adjusts for altitude and offers English/Metric units. Easily access favorite refrigerants and supplementary information.

Pressure/Temperature calculationSuperheat/Subcool calculationAutomatic altitude correction
🔍 Reference
(51)
free
15
Simple Fuel Calculator (USA)
Simple Fuel Calculator (USA)
Simple Fuel Calculator (USA)
Calculates fuel usage and cost
Free

This application helps users calculate their fuel consumption and associated costs. It utilizes standard units commonly used in the USA, such as miles, dollars, and U.S. gallons.

Fuel consumption calculationCost calculationUses US standard units (miles, $, gallons)
✈️ Travel
(6)
free
16
Roofing Ventilation Calculator
Roofing Ventilation Calculator
Roofing Ventilation Calculator
by Compagnie de Saint-Gobain
Free

Calculate the necessary amount of ventilation products for an attic space. Input attic dimensions or square footage to receive results based on the NFA 1/300 rule for balanced ventilation.

Attic dimension inputSquare footage inputNFA 1/300 rule calculation
💼 Business
(6)
free
17
Orifice Flow Rate Calculator
Orifice Flow Rate Calculator
Orifice Flow Rate Calculator
Natural Gas
Free

Easily calculate natural gas orifice flow rates using the AGA 3 standard. This utility app allows users to determine MCF production for a given duration, save calculations, and export data to CSV. It functions offline, requiring no cell service.

Orifice MCF CalculatorRotary (Direct) MCF CalculatorSave all calculations
🔧 Utilities
(98)
free
18
McDantim EasyBlend Calculator
McDantim EasyBlend Calculator
McDantim EasyBlend Calculator
by McDantim Inc
Free

Calculate the ideal gas blend and pressure for your beverage dispense system. This tool accounts for beverage temperature, keg pressure, CO2 content, and elevation to ensure perfect carbonation.

Calculate perfect CO2/N2 blendDetermine pressure range for carbonationConvert between US and metric units
📊 Productivity
(4)
free
19
Tracer - Gas Detector
Tracer - Gas Detector
Tracer - Gas Detector
for various gas leak detection
Free

This app works with a smartphone-powered USB device to detect various gas leaks like methane and formaldehyde. It provides real-time monitoring and alerts to enhance safety at home or work. Pinpoint emission sources effortlessly for peace of mind.

Detects methane, propane, formaldehyde, hydrogenSmartphone-powered via USBReal-time monitoring and alerts
🔧 Utilities
(1)
ad-supported
20
Gas Volume Calc
Gas Volume Calc
Gas Volume Calc
Orifice Gas Flow Calculator
Free

This utility estimates natural gas flow rate using standard orifice meter calculations. It's designed for field use by operators, technicians, and engineers, combining meter geometry, flowing conditions, and gas composition for quick, reliable estimates.

Estimates natural gas flow rate (MCFD)Uses standard orifice meter calculationsCombines meter geometry, flowing conditions, and gas composition
📊 Productivity
(3)
free

FAQ about Gas Ventilation Calculator Uk

Are there free gas ventilation calculator uk apps for iPhone?
Yes — 18 of the top gas ventilation calculator uk apps we rank are free to download, including GB Gas Heat Input Calculator and HVACR Check & Charge.
Gas Ventilation Calculator UK has no ads and has no in-app purchases, according to its App Store listing as of July 2026.
We track 212+ gas ventilation calculator uk apps on the iOS App Store as of July 2026, ranked by rating, recency, and analysis of real user reviews.
The Gas Ventilation Calculator UK is used to determine the necessary ventilation sizes for various domestic gas appliances, including flueless, open flue, and room-sealed types, up to 70kW net heat input, adhering to UK regulations.
Yes, for multiple appliances in a single room, the app provides a guide to remind users of the regulations. Separate calculators within the app will then need to be used to determine the required vent size.