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Stephen Day

Gas Safe Engineer at iHeat

Stephen Day is a Gas Safe registered and FGAS certified engineer with over 20 years of hands-on experience in the heating, cooling, and renewable energy industry, specialising in boiler installations, air conditioning, and heat pump systems.

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About Stephen Day

Stephen Day is a Gas Safe registered and FGAS certified engineer with over 20 years of hands-on experience in the heating, cooling and renewable energy industry.

Throughout his career, Stephen has designed, installed and maintained thousands of systems across homes and businesses in the UK. His background on the tools, combined with his directorship role at iHeat, gives him a rare understanding of both the technical and operational sides of the industry.

He has helped to secure Which? Trusted Trader accreditation all with a focus on delivering great service and long-term value for customers. He also writes for the iHeat blog, sharing practical advice and explaining heating topics in plain, helpful language.

Stephen continues to stay up to date with the latest heating technologies, building regulations and low-carbon innovations.

Gas Safe ID: 5910722

Expertise

  • Boiler systems and installation
  • Heat pumps and hybrid heating systems
  • Gas safety and compliance
  • System design
  • Renewable and low-carbon technologies
  • Technical training


Articles by Stephen Day are reviewed by iHeat’s technical team for accuracy and reliability.

Stephen Day's latest articles

Are Boiler Hot Water Storage Tanks a Necessity?

30th May, 2025 Guides

Are Boiler Hot Water Storage T...

You may be wondering, are hot water storage tanks essential to home heating and the runnin...

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Vaillant Combi Boilers

30th May, 2025 Guides

Vaillant Combi Boilers

At iHeat We’ve joined forces with Vaillant UK to become the first online company to instal...

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Vaillant F24 Error Code - How To Fix

30th May, 2025 Guides

Vaillant F24 Error Code - How...

Any time a boiler error code presents itself it can be anxiety and stress inducing, but fe...

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Vaillant EcoTEC Plus

30th May, 2025 Reviews

Vaillant EcoTEC Plus

Vaillant UK manufactures some of the finest boilers on the market, highly efficient and ec...

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Vaillant ecoFIT Pure Review

30th May, 2025 Reviews

Vaillant ecoFIT Pure Review

At iHeat we stock only the best boilers to efficiently heat your home, and save you money....

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Ideal F1 Error Code - How To Fix

30th May, 2025 Guides

Ideal F1 Error Code - How To F...

Anytime a boiler isn’t operating as it should, it can be frustrating as well as time consu...

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Google Nest Thermostat Benefits

30th May, 2025 Reviews

Google Nest Thermostat Benefit...

A Google Nest smart thermostat can be a powerful tool in controlling home heating and thro...

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EPH Combi Pack 4 Thermostat

30th May, 2025 Reviews

EPH Combi Pack 4 Thermostat

A modern and capable thermostat can often be overlooked as a key tool, synchronising with...

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What Does Boiler ErP mean? - Energy Efficiency Guide

30th May, 2025 Advice

What Does Boiler ErP mean? - E...

When it comes to buying a new boiler, there can be some unfamiliar terms or phrases that d...

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Boiler Condemned? What to do!

30th May, 2025 Advice

Boiler Condemned? What to do!

If your boiler has been recently condemned, it can be a cause for concern as panic and ind...

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Best Baxi Boilers (Prices & Reviews) Which Is The Best?

30th May, 2025 Guides

Best Baxi Boilers (Prices & Re...

Baxi is an affordable, top-notch home heating brand and in this article we will be explori...

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Gas Boiler vs Electric Boiler: Which Is Best?

30th May, 2025 Comparisons

Gas Boiler vs Electric Boiler:...

The cost of running an electric boiler can be high, especially if you live in the UK. Let'...

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