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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 Air Conditioning Units UK

29th July, 2025 Guides

Best Air Conditioning Units UK

Air conditioning helps keep homes cool during heatwaves. This is especially important for...

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Ideal F3 Error Code - How To Fix

25th July, 2025 Guides

Ideal F3 Error Code - How To F...

The Ideal F3 error code is a common issue that can cause your boiler to shut down unexpect...

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Worcester Bosch Climate 3000i Air Con Review

17th July, 2025 Reviews

Worcester Bosch Climate 3000i...

After an in-depth look at the Worcester Bosch Climate 3000i air conditioning system, we've...

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Why Is My Radiator Cold At The Bottom?

12th June, 2025 Advice

Why Is My Radiator Cold At The...

If you find your radiator cold at the bottom, it could mean that there is an issue with yo...

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What to do with Your Boiler when You Go on Holiday

02nd June, 2025 Advice

What to do with Your Boiler wh...

The last thing you want to be thinking about while you're enjoying your summer holidays, o...

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What Size Air Source Heat Pump Do You Need?

30th May, 2025 Guides

What Size Air Source Heat Pump...

Air source heat pumps (ASHP) are popular for providing efficient heating solutions. These...

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Ground Source Heat Pump Installation

30th May, 2025 Guides

Ground Source Heat Pump Instal...

Ground source heat pumps (GSHPs) can be a great way to meet heating needs for both homes a...

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Potterton Boiler E119 Error Code

30th May, 2025 Guides

Potterton Boiler E119 Error Co...

Navigating boiler error codes can be puzzling yet essential for preserving a fully functio...

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How Can I Increase My Water Pressure

30th May, 2025 Advice

How Can I Increase My Water Pr...

Having a low water pressure in your home can be frustrating and inconvenient.

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Vented vs Unvented Hot Water Cylinders

30th May, 2025 Comparisons

Vented vs Unvented Hot Water C...

Homes will need a new boiler every 10 to 15 years to ensure they are safe and running effi...

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Central Heating Boilers

30th May, 2025 Guides

Central Heating Boilers

How do you decide which boiler is actually right for your central heating needs?

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Heat Only Boilers

30th May, 2025 Guides

Heat Only Boilers

Buying a new boiler can be a stressful process. There are a lot of different systems to co...

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