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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

Boiler Hacks: Boost Performance & Savings

04th February, 2026 Guides

Boiler Hacks: Boost Performanc...

Boiler hacks are simple tricks and tips that can help you save money on your heating bills...

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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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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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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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How To Choose The Right Boiler For Your Home

03rd February, 2026 Guides

How To Choose The Right Boiler...

Choosing the right boiler for your home can be a stressful and overwhelming experience, bu...

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Do I Need to Do Anything Prior to My Boiler Installation?

03rd February, 2026 Guides

Do I Need to Do Anything Prior...

Installing a new boiler is an important investment in your home, and there are several thi...

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Egg Timer on Vaillant Boiler

03rd February, 2026 Guides

Egg Timer on Vaillant Boiler

The egg timer symbol on a Vaillant boiler signifies the activation of the anti-cycling fun...

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Heat Pump Repair - 2026 Guide

02nd February, 2026 Guides

Heat Pump Repair - 2026 Guide

Help for when your heat pump is not working properly.

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Ideal Boiler L2 Fault Code - How to Fix

02nd February, 2026 Guides

Ideal Boiler L2 Fault Code - H...

What the Ideal L2 error code means and what to do when your boiler will not stay lit.

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Combining Air Source Heat Pumps And Solar Panels: UK Guide

16th January, 2026 Advice

Combining Air Source Heat Pump...

Most homes can lower heating costs by combining air source heat pumps with solar panels.

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