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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

What is an Immersion Heater and What Does it Cost?

27th October, 2025 Advice

What is an Immersion Heater an...

Everything UK homeowners need to know about immersion heaters and running costs.

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Megaflow System - What is a Megaflow System and How Much do they Cost?

27th October, 2025 Guides

Megaflow System - What is a Me...

Unveiling the Power of Megaflow: Transforming Your Home's Heating and Hot Water Experience

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Boiler Leaking Water? (How to Fix a Leaking Boiler)

27th October, 2025 Advice

Boiler Leaking Water? (How to...

If your boiler is leaking water, it’s likely due to pressure or worn parts. Acting fast he...

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What Is A MagnaCleanse?

22nd October, 2025 Advice

What Is A MagnaCleanse?

The heating system in your home is a valuable tool that is used on a regular basis, most l...

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Fix a Frozen Boiler Condensate Pipe

22nd October, 2025 Advice

Fix a Frozen Boiler Condensate...

A frozen condensate pipe blocks the waste-water outlet from a modern boiler. This causes t...

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Ideal Boilers Reviews

21st October, 2025 Reviews

Ideal Boilers Reviews

Ideal Boilers, with over a century of operation, has solidified its position as a venerabl...

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Glow Worm Boiler Review: Ultimate₃ Combi

18th October, 2025 Reviews

Glow Worm Boiler Review: Ultim...

Combi boilers, or combination boilers, epitomise efficiency and convenience in modern home...

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Vaillant Ecotec Pro Review

18th October, 2025 Reviews

Vaillant Ecotec Pro Review

Vaillant's Ecotec Pro combi boiler series is renowned for providing efficient heating and...

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How to Reset Ideal Logic Combi 30 Boiler

18th October, 2025 Guides

How to Reset Ideal Logic Combi...

Resetting an Ideal Logic Combi 30 boiler might be needed for a few reasons. Often, it is d...

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Can a Boiler Explode?

18th October, 2025 Guides

Can a Boiler Explode?

Boilers are a key part of many homes, but they can pose risks if not properly maintained....

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Vaillant F28 Error Code - How to Fix?

16th October, 2025 Guides

Vaillant F28 Error Code - How...

Any time your boiler displays an error code, it can be a huge stressor, especially if it d...

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Boiler Not Working? Most Common Problems (And Fixes)

16th October, 2025 Advice

Boiler Not Working? Most Commo...

A complete guide to getting that boiler working again and some common fault codes and how...

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