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Stephen Day

Gas Safe Engineer

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.

Expertise & Focus Areas

  • 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

Home Boiler Cover - Mega Guide

12th August, 2025 Guides

Home Boiler Cover - Mega Guide

Home boiler cover acts as a safety net, ensuring that if a boiler breaks down or encounter...

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Does a Worcester Bosch Boiler Need a Service?

12th August, 2025 Guides

Does a Worcester Bosch Boiler...

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

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Combi Boiler Valve Positions Explained

12th August, 2025 Guides

Combi Boiler Valve Positions E...

With the advancements in boiler technology by 2025, understanding the various valve positi...

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Boiler Repair Bolton

12th August, 2025 Guides

Boiler Repair Bolton

In Bolton, boiler repair costs and procedures vary significantly depending on the type of...

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Boiler Installation Bolton

12th August, 2025 Guides

Boiler Installation Bolton

The expense incurred from installing a boiler can vary significantly based on factors such...

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Boiler Repair Birmingham

12th August, 2025 Guides

Boiler Repair Birmingham

Boiler repairs are a critical aspect of maintaining a household's functionality and safety...

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Boiler Repair Liverpool

12th August, 2025 Guides

Boiler Repair Liverpool

In Liverpool, the efficiency and safety of boiler systems are paramount for comfortable li...

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Boiler Repair London

12th August, 2025 Guides

Boiler Repair London

Boiler repair in London for the year 2025 entails not only a financial consideration but a...

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Boiler Repair Glasgow

12th August, 2025 Guides

Boiler Repair Glasgow

In Glasgow, the repair of boilers is a service paramount to the comfort of residents, ensu...

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Boiler Repair Manchester

12th August, 2025 Guides

Boiler Repair Manchester

With boiler servicing and maintenance being pivotal for safety and cost efficiency, regula...

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Boiler Installation Liverpool

12th August, 2025 Guides

Boiler Installation Liverpool

Types of Boilers There are three primary boiler types to consider for a home in Liverpool:...

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Boiler Installation London

12th August, 2025 Guides

Boiler Installation London

Selecting the appropriate boiler for your London home involves understanding the different...

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