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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

How to Link a Wood Burner to Your Central Heating (UK Guide)

21st May, 2026 Guides

How to Link a Wood Burner to Y...

Connecting a wood burner to your central heating system can be an efficient way to heat yo...

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No Water Coming Out Of Hot Tap (Combi Boiler)

21st May, 2026 Guides

No Water Coming Out Of Hot Tap...

Addressing the lack of hot water from a tap usually starts with understanding how a combi...

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Potterton Boiler E119 Error Code

21st May, 2026 Guides

Potterton Boiler E119 Error Co...

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

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Pressure Dropping on Boiler Every Day

21st May, 2026 Guides

Pressure Dropping on Boiler Ev...

Boiler pressure is the measure of balance between water and air within the central heating...

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What Happens After Your Boiler is Installed By iHeat?

21st May, 2026 Advice

What Happens After Your Boiler...

In this guide, we’ll be answering some of the most frequently asked questions about what h...

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What is a Smart Home and Smart Boiler?

20th May, 2026 Guides

What is a Smart Home and Smart...

Smart boilers are an innovative technology that can help homeowners save money on their en...

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What is the Cheapest Way to Heat a House?

20th May, 2026 Guides

What is the Cheapest Way to He...

Heating your home should not be a decision ruled by fear of overspending on your bills, es...

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What Temperature For A Thermostat In Winter?

20th May, 2026 Guides

What Temperature For A Thermos...

Thermostats are devices used to control the heating or cooling of a home. They function by...

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Does a Worcester Bosch Boiler Need a Service?

20th May, 2026 Guides

Does a Worcester Bosch Boiler...

Regular maintenance of Worcester Bosch boilers is essential to ensure safety and efficienc...

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Retrofitting Heat Pumps in Existing Homes: The Pros, Cons, and Key Considerations

20th May, 2026 Guides

Retrofitting Heat Pumps in Exi...

Retrofitting a heat pump replaces or supplements traditional heating methods with modern,...

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How Much Energy/Electricity Do My Appliances Use? Expert advice

20th May, 2026 Guides

How Much Energy/Electricity Do...

Different appliances in your home use various amounts of electricity. Understanding this c...

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The Benefits of Zoned Heating for Energy Savings

20th May, 2026 Guides

The Benefits of Zoned Heating...

Zoned heating is a way to improve efficiency in heating and cooling systems. It divides a...

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