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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

Baxi Megaflo Compact System - Boiler Review

04th February, 2026 Guides

Baxi Megaflo Compact System -...

The Baxi Megaflo Compact System boiler is a high-efficiency heating solution, designed wit...

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Baxi Combi Boiler Costs

04th February, 2026 Guides

Baxi Combi Boiler Costs

A newer, high-end Baxi combi boiler not only aims to save on space but can also offer sign...

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Baxi Boiler Not Working, No Error Code

04th February, 2026 Guides

Baxi Boiler Not Working, No Er...

In the realm of boiler maintenance, two elements take centre stage: diagnosing issues and...

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Baxi Boiler E125 Error Code

04th February, 2026 Guides

Baxi Boiler E125 Error Code

Boiler systems are intricate and can exhibit a range of error codes that signal specific i...

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At What Age Should You Replace A Boiler?

04th February, 2026 Advice

At What Age Should You Replace...

Your boiler is one of the most important appliances in your home. It is responsible for ke...

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Alpha E-Tec Boilers | A Guide to the Range

04th February, 2026 Reviews

Alpha E-Tec Boilers | A Guide...

Founded in 1966, Alpha Heating Innovation is recognised as one of the leaders of the UK’s...

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Air Source Heating - Air to Air Source Heat Pump

04th February, 2026 Guides

Air Source Heating - Air to Ai...

Air source heating harnesses environmental warmth to heat homes efficiently, utilizing a d...

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How to Soundproof a Boiler Cupboard

04th February, 2026 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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The Best LPG Combi Boilers 2026

04th February, 2026 Guides

The Best LPG Combi Boilers 202...

You may have heard of LPG boilers before, but even if you are not familiar with them, they...

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What is Boiler Dry Cycling?

03rd February, 2026 Guides

What is Boiler Dry Cycling?

Boiler dry cycling occurs when a boiler frequently turns on and off without a demand for h...

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How Long Does a Boiler Service Take?

03rd February, 2026 Advice

How Long Does a Boiler Service...

A boiler service is an important part of boiler maintenance, helping to ensure that your h...

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Vaillant F61 Error Code - How To Fix

03rd February, 2026 Guides

Vaillant F61 Error Code - How...

One of the most common Vaillant boiler error codes is the F61 error code. This error code...

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