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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 Repair Glasgow

19th February, 2026 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 Installation Edinburgh

19th February, 2026 Guides

Boiler Installation Edinburgh

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

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Boiler Service Edinburgh

19th February, 2026 Guides

Boiler Service Edinburgh

In Edinburgh, ensuring the optimal performance and safety of your boiler is paramount.

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Boiler Repair Edinburgh

19th February, 2026 Guides

Boiler Repair Edinburgh

When engaging with boiler repair in Edinburgh, it's imperative to have an appreciation for...

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Boiler Installation Manchester

19th February, 2026 Guides

Boiler Installation Manchester

A comprehensive understanding of the process is essential to ensure that the installation...

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Boiler Service Manchester

19th February, 2026 Guides

Boiler Service Manchester

Boiler service in Manchester serves as an essential practice for maintaining your heating...

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Boiler Repair Manchester

19th February, 2026 Guides

Boiler Repair Manchester

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

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Boiler Service Birmingham

19th February, 2026 Guides

Boiler Service Birmingham

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

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How Efficient Is My Boiler?

13th February, 2026 Guides

How Efficient Is My Boiler?

Boiler energy efficiency refers to how well a boiler uses its fuel to generate heat. This...

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This Valentine's Day we’re asking - Does the size of your pipe really matter? 2026

12th February, 2026 Guides

This Valentine's Day we’re ask...

This Valentine’s Day we want to let you in on a dirty little secret…

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What Happens After Your Boiler is Installed By iHeat?

12th February, 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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Worcester Bosch Greenstar 4000 System Boiler Review

11th February, 2026 Reviews

Worcester Bosch Greenstar 4000...

Today we will review the Worcester Bosch Greenstar 4000 System Boiler, and whether this sy...

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