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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 Installation Edinburgh

21st May, 2026 Guides

Boiler Installation Edinburgh

When installing a new boiler, homeowners must consider the type, the brands available, and...

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Boiler Pilot Light Won't Stay Lit

21st May, 2026 Advice

Boiler Pilot Light Won't Stay...

If you own an older boiler, you might be familiar with the pilot light. The pilot light is...

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Boiler Service Birmingham

21st May, 2026 Guides

Boiler Service Birmingham

Boiler servicing in Birmingham not only ensures a warm environment but also plays a critic...

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Boiler Warranties & Guarantees: Top UK Brands for Best Value

21st May, 2026 Guides

Boiler Warranties & Guarantees...

Boiler warranties and guarantees are essential aspects to consider when investing in a new...

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Boilers on Finance - The Best Pay Monthly and 0% Interest Deal

21st May, 2026 Guides

Boilers on Finance - The Best...

Buying a boiler on finance can be hard with all the different options available. Let us ex...

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Combi Boiler Valve Positions Explained

21st May, 2026 Guides

Combi Boiler Valve Positions E...

With the advancements in boiler technology by 2026, understanding the various valve positi...

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Boiler Not Responding To Thermostat

21st May, 2026 Advice

Boiler Not Responding To Therm...

When your boiler isn’t responding to its thermostat, or vice versa, it can be tricky to id...

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Grundfos Central Heating Pump

21st May, 2026 Guides

Grundfos Central Heating Pump

A Grundfos central heating pump is an essential part of a boiler system in many UK homes....

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How To Drain Central Heating System

21st May, 2026 Guides

How To Drain Central Heating S...

Understanding how to properly drain the system is vital for homeowners and DIY enthusiasts...

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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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