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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 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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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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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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What Are Biomass Boilers And Heating Systems?

15th August, 2025 Advice

What Are Biomass Boilers And H...

Biomass is an environmentally considerate and renewable energy source, generated from the...

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Is a Heat Pump Cheaper to Run Than a Boiler?

15th August, 2025 Comparisons

Is a Heat Pump Cheaper to Run...

In this UK heat pump vs new gas boiler comparison guide, we'll be taking a look at which t...

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Ideal Boiler Status 00 - How to Fix

15th August, 2025 Guides

Ideal Boiler Status 00 - How t...

Ideal boilers provide a variety of fault codes to help diagnose issues. Understanding thes...

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Average Energy Bill UK

12th August, 2025 Guides

Average Energy Bill UK

The average electricity bill in the UK can vary based on many factors like location, consu...

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Home EV Charging Costs

12th August, 2025 Guides

Home EV Charging Costs

Electric Vehicle (EV) chargers are quantified by their power output in kilowatts (kW). Ele...

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Vaillant Boiler Flue Extension

12th August, 2025 Guides

Vaillant Boiler Flue Extension

This guide dives deep into what flue extensions are, why they are important, and how to in...

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Vaillant PCB

12th August, 2025 Guides

Vaillant PCB

A Vaillant boiler Printed Circuit Board (PCB) is a vital part of a modern boiler system. I...

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How to Reset Viessmann Boiler

12th August, 2025 Guides

How to Reset Viessmann Boiler

Resetting a boiler is an important step when dealing with various system faults or issues....

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