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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

Glow Worm Boiler Reviews

05th January, 2026 Reviews

Glow Worm Boiler Reviews

In 2026, Glow Worm continues to offer a broad range of boilers, each tailored to different...

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Alpha Boilers Reviews

05th January, 2026 Reviews

Alpha Boilers Reviews

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

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Ideal Combi Boiler Costs

05th January, 2026 Guides

Ideal Combi Boiler Costs

Ideal's combi boilers are engineered to meet these needs, offering a range of models that...

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Navien NCB 300 Boiler Review

05th January, 2026 Reviews

Navien NCB 300 Boiler Review

Unlocking the Efficiency and Value of the Navien NCB 300 Boiler: A Comprehensive Guide for...

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Dyson Air Con

05th January, 2026 Guides

Dyson Air Con

Dyson's 2026 range of air conditioning products offers a variety of models packed with adv...

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Boiler Repair London

05th January, 2026 Guides

Boiler Repair London

Boiler repair in London for the year 2026 entails not only a financial consideration but a...

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Combi Boiler Valve Positions Explained

05th January, 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 Installation Birmingham

05th January, 2026 Guides

Boiler Installation Birmingham

When contemplating a new boiler installation in Birmingham during 2026, homeowners should...

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Worcester Bosch Boilers Reviews

05th January, 2026 Reviews

Worcester Bosch Boilers Review...

Worcester Bosch's 2026 boiler range extends its legacy of providing high-quality heating s...

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Best Electric Combi Boilers (Electric-Only Guide)

05th January, 2026 Guides

Best Electric Combi Boilers (E...

The best electric combi boilers in 2026 include models from Electric Heating Company, Heat...

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What is a Gas Supply Pipe?

05th January, 2026 Guides

What is a Gas Supply Pipe?

A gas supply pipe is an essential part of any property with a gas boiler. Its main job is...

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Thermostats for Heat Pumps Mega Guide

05th January, 2026 Guides

Thermostats for Heat Pumps Meg...

Heat pump thermostats play a crucial role in managing the temperature in homes. A heat pum...

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