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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

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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What Is A Thermostatic Radiator Valve (TRV)?

30th May, 2025 Advice

What Is A Thermostatic Radiato...

As the colder months are beginning to set in, you may want to increase the temperatures em...

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Ideal Logic Max Combi Boiler Review

30th May, 2025 Reviews

Ideal Logic Max Combi Boiler R...

With over a century of being at the forefront of the heating industry, Ideal has helped re...

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A History of Ideal Boilers

30th May, 2025 Guides

A History of Ideal Boilers

Here we will take a look at some of the key moments in Ideal's inertia, development and ho...

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Carbon Monoxide & Boiler Safety Guide

30th May, 2025 Advice

Carbon Monoxide & Boiler Safet...

Throughout the colder months, many of us use our boilers on a daily basis to warm our home...

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What Is A MagnaClean?

30th May, 2025 Advice

What Is A MagnaClean?

You may have heard of MagnaClean (sometimes accidentally called Magna Clean) before, but w...

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What Is A Chemical Flush?

30th May, 2025 Advice

What Is A Chemical Flush?

Boiler maintenance can be a tricky process, and an advice guide can help a lot.

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How Do You Fix a Boiler Kettling Noise?

30th May, 2025 Advice

How Do You Fix a Boiler Kettli...

Is your boiler making some strange noises? Chances are its 'boiler kettling' and here is h...

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What is a Boiler Flue and How Do I Find it?

30th May, 2025 Advice

What is a Boiler Flue and How...

Discover the different typeof boiler flues and what your home currently has and if it is t...

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Can I Move My Boiler?

30th May, 2025 Advice

Can I Move My Boiler?

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