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Stephen Day

Gas Safe Engineer

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.

Expertise & Focus Areas

  • 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

What Temperature Should Hot Water Be At The Tap?

30th May, 2025 Guides

What Temperature Should Hot Wa...

Maintaining the ideal hot water temperature in your home or building is essential for safe...

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Boxing In A Boiler: How to Hide a Boiler in Kitchen

30th May, 2025 Guides

Boxing In A Boiler: How to Hid...

Hiding a boiler in the kitchen can enhance the room's aesthetic while maintaining function...

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Do Radiator Covers Block Heat?

30th May, 2025 Guides

Do Radiator Covers Block Heat?

We'll be exploring what radiator covers are, whether they're necessary, and if you really...

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Vaillant Boiler Parts 2025

30th May, 2025 Guides

Vaillant Boiler Parts 2025

Vaillant boilers use a variety of parts to ensure efficient operation. This section looks...

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How to Soundproof a Boiler Cupboard

30th May, 2025 Guides

How to Soundproof a Boiler Cup...

From adding insulation to sealing gaps, there are both DIY and professional methods availa...

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How to Repressurise a Baxi Boiler

30th May, 2025 Guides

How to Repressurise a Baxi Boi...

Repressurising a Baxi boiler means restoring the correct water pressure inside the boiler...

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Combi Boiler Pipes Explained

30th May, 2025 Guides

Combi Boiler Pipes Explained

Understanding the key components of combi boiler pipework is essential for making informed...

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Pressure Release Valve Boiler

30th May, 2025 Guides

Pressure Release Valve Boiler

A pressure release valve (PRV) on a boiler is a critical safety component ensuring that th...

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Why Does My Boiler Fire Up in the Night?

30th May, 2025 Guides

Why Does My Boiler Fire Up in...

Occasionally, boilers turn on during the night due to specific triggers. These include the...

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How to Reset Glow Worm Boiler

30th May, 2025 Guides

How to Reset Glow Worm Boiler

Taking care of your Glow-worm boiler means not only understanding how to reset it but also...

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Do I Need a Carbon Monoxide Detector with a Combi Boiler

30th May, 2025 Guides

Do I Need a Carbon Monoxide De...

Boilers can produce carbon monoxide (CO), a dangerous and potentially deadly gas, through...

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Where is the Boiler Fuse Located?

30th May, 2025 Guides

Where is the Boiler Fuse Locat...

A boiler fuse is a small yet crucial electrical component found within a boiler system. It...

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