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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

Hive Alfen Eve S Line EV Charger Review

12th August, 2025 Reviews

Hive Alfen Eve S Line EV Charg...

The Hive Alfen Eve S-Line EV Charger emerges as a reliable solution for home charging, mar...

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Vaillant Air Source Heat Pumps

11th August, 2025 Guides

Vaillant Air Source Heat Pumps

Air source heat pumps can be an extremely cost effective and efficient method of heating y...

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Boiler Timer Guide

11th August, 2025 Guides

Boiler Timer Guide

A boiler timer is an essential component of your heating system, allowing you to control w...

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Ideal Logic+ Heat Only Boiler Review

11th August, 2025 Reviews

Ideal Logic+ Heat Only Boiler...

Today we will be reviewing the Ideal Logic + heat only boiler, specifically in its 18kW ca...

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Do I Need A Boiler Service?

11th August, 2025 Advice

Do I Need A Boiler Service?

Does a boiler need an annual service? We run through boiler services and some frequently a...

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Which Worcester Bosch Boiler is Best?

08th August, 2025 Comparisons

Which Worcester Bosch Boiler i...

Choosing the right boiler for your property is crucial to ensure optimal heating efficienc...

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Worcester Bosch Boiler No Hot Water

07th August, 2025 Guides

Worcester Bosch Boiler No Hot...

When homeowners encounter a lack of hot water from their Worcester Bosch boiler, it's ofte...

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Most Efficient Way to Run Air Source Heat Pump

01st August, 2025 Guides

Most Efficient Way to Run Air...

Setting the right temperature with an air source heat pump is important for comfort and ef...

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What is an EV Charger?

31st July, 2025 Guides

What is an EV Charger?

Electric vehicle (EV) charging is integral to the EV ownership experience, affecting conve...

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Evec EV Charger Review - Type 1 & Type 2, Single Phase, Untethered VEC01

31st July, 2025 Reviews

Evec EV Charger Review - Type...

The Evec EV Charger VEC01 emerges as a practical solution in the realm of electric vehicle...

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Ideal F3 Error Code - How To Fix

25th July, 2025 Guides

Ideal F3 Error Code - How To F...

The Ideal F3 error code is a common issue that can cause your boiler to shut down unexpect...

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Why Is My Radiator Cold At The Bottom?

12th June, 2025 Advice

Why Is My Radiator Cold At The...

If you find your radiator cold at the bottom, it could mean that there is an issue with yo...

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