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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

How Long Will A Back Boiler Conversion Take?

20th May, 2026 Advice

How Long Will A Back Boiler Co...

A back boiler conversion could be your ticket from the past to the present, where boilers...

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How Long Does a Boiler Service Take?

20th May, 2026 Advice

How Long Does a Boiler Service...

A boiler service is an important part of boiler maintenance, helping to ensure that your h...

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How Efficient Is My Boiler?

20th May, 2026 Guides

How Efficient Is My Boiler?

Boiler energy efficiency refers to how well a boiler uses its fuel to generate heat. This...

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Hot Water Storage Cylinders/Tanks for Boilers

20th May, 2026 Guides

Hot Water Storage Cylinders/Ta...

Choosing the right hot water tank requires understanding your home’s specific requirements...

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Home Boiler Cover - Mega Guide

20th May, 2026 Guides

Home Boiler Cover - Mega Guide

Home boiler cover acts as a safety net, ensuring that if a boiler breaks down or encounter...

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Heat Pumps vs Modern Gas Boilers

20th May, 2026 Comparisons

Heat Pumps vs Modern Gas Boile...

In times of eye-watering energy prices and home heating bills, some debate which type of h...

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Google Nest Thermostat Benefits

20th May, 2026 Reviews

Google Nest Thermostat Benefit...

A Google Nest smart thermostat can be a powerful tool in controlling home heating and thro...

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F27 Glow Worm Fault

20th May, 2026 Guides

F27 Glow Worm Fault

The F27 error code can result from several underlying issues, ranging from low gas pressur...

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Glow-Worm F29 Error Code - How To Fix

20th May, 2026 Guides

Glow-Worm F29 Error Code - How...

The Glow-Worm F29 error code indicates a loss of flame during operation, which can cause a...

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Glow Worm Boiler Review: Ultimate₃ Combi

20th May, 2026 Reviews

Glow Worm Boiler Review: Ultim...

Combi boilers, or combination boilers, epitomise efficiency and convenience in modern home...

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Difference Between LPG and Natural Gas

20th May, 2026 Advice

Difference Between LPG and Nat...

In this article, we’re going to be explaining some ways in which you can identify whether...

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Free Boiler Scheme/Grants 2026 - UPDATED

20th May, 2026 Guides

Free Boiler Scheme/Grants 2026...

Navigating the landscape of grants can be complex, with schemes differing in their eligibi...

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