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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

Ferroli Boiler Prices

15th August, 2025 Reviews

Ferroli Boiler Prices

In this blog we will be exploring some of Italian heating giant Ferroli’s best boilers, ta...

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Most Economical Way to Use Central Heating UK

15th August, 2025 Guides

Most Economical Way to Use Cen...

Leaving the heating on low all day might seem like a way to avoid the chill without bursti...

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Ideal Combi Boiler Pressure

15th August, 2025 Guides

Ideal Combi Boiler Pressure

Combi boiler pressure is a crucial factor for maintaining efficiency and safety. For most...

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What temperature should my boiler be set at for central heating?

15th August, 2025 Guides

What temperature should my boi...

Boilers are the heartbeat of a home's central heating system, efficiently managing the bal...

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Boiler Repair Edinburgh

15th August, 2025 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 Edinburgh

15th August, 2025 Guides

Boiler Installation Edinburgh

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

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Boiler Installation Birmingham

15th August, 2025 Guides

Boiler Installation Birmingham

When contemplating a new boiler installation in Birmingham during 2025, homeowners should...

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Best Shower for Combi Boiler

15th August, 2025 Guides

Best Shower for Combi Boiler

A combination boiler, commonly known as a combi boiler, is an advanced heating unit that p...

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Alpha E-Tec Plus Boiler Review

15th August, 2025 Reviews

Alpha E-Tec Plus Boiler Review

The Alpha E-Tec Plus Boiler is proving extermely popular, read through our expert opinion...

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Alpha E-Tec Combi Boiler Review

15th August, 2025 Reviews

Alpha E-Tec Combi Boiler Revie...

Here we will review the Alpha E-Tec boiler, specifically in its capacity and whether or no...

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Alpha Boilers Reviews

15th August, 2025 Reviews

Alpha Boilers Reviews

Alpha Boilers have ascended to notable esteem in the UK heating market, with a focal ethos...

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Worcester Bosch Greenstar 8000 Life (Combi) Boiler Review

15th August, 2025 Reviews

Worcester Bosch Greenstar 8000...

Thinking of buying a Worcester Bosch Greenstar 8000 Life Boiler? Find out iHeat's opinion...

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