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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

Worcester Bosch Boiler Pressure - UK Mega Guide

14th October, 2025 Guides

Worcester Bosch Boiler Pressur...

Maintaining the correct boiler pressure is essential for the efficiency and longevity of W...

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Ideal Boiler L2 Fault Code - How to Fix

14th October, 2025 Guides

Ideal Boiler L2 Fault Code - H...

Facing an Ideal L2 boiler error code? iHeat, an online boiler installation company, explai...

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Boiler Not Responding To Thermostat

14th October, 2025 Advice

Boiler Not Responding To Therm...

When your boiler isn’t responding to its thermostat, or vice versa, it can be tricky to id...

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Worcester Bosch Combi Boiler Costs

10th October, 2025 Guides

Worcester Bosch Combi Boiler C...

With the colder months quickly approaching (sigh), a new, efficient Worcester Bosch combi...

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What is Boiler Renting/Subscription?

10th October, 2025 Guides

What is Boiler Renting/Subscri...

Boiler renting, often regarded as a boiler subscription service, has emerged as a vital al...

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What Happens After Your Boiler is Installed By iHeat?

10th October, 2025 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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Vokera Boilers Prices 2025

10th October, 2025 Reviews

Vokera Boilers Prices 2025

Vokera is an established and innovative brand, providing highly efficient home heating, wh...

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Viessmann Combi Boiler Costs

10th October, 2025 Guides

Viessmann Combi Boiler Costs

Viessmann combi boilers are renowned for their efficiency and technological advancement.

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Vaillant Combi Boiler Costs

10th October, 2025 Guides

Vaillant Combi Boiler Costs

As Vaillant continues to innovate, integrating smart technology and improving energy perfo...

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Vaillant Boiler Prices

10th October, 2025 Guides

Vaillant Boiler Prices

As an online boiler installation company, iHeat provides an in-depth look at Vaillant boil...

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How To Choose The Right Boiler For Your Home

10th October, 2025 Guides

How To Choose The Right Boiler...

Choosing the right boiler for your home can be a stressful and overwhelming experience, bu...

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Combi Boiler Replacement Cost

10th October, 2025 Guides

Combi Boiler Replacement Cost

Replacing your boiler can be a stressful and costly process. That’s why we have written th...

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