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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

Ideal Room Temperature

20th May, 2026 Guides

Ideal Room Temperature

Comfort in living spaces is crucial for wellbeing. The ideal room temperature can vary bas...

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Ideal Logic+ Combi Review

20th May, 2026 Reviews

Ideal Logic+ Combi Review

In this guide, we will be reviewing the Ideal Logic+ combi boiler, taking a look at its fe...

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Ideal Boilers - Vogue Range

20th May, 2026 Guides

Ideal Boilers - Vogue Range

The Ideal Boilers' Vogue Range stands out as a premium selection, consistent with the comp...

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Ideal Boiler Status C

20th May, 2026 Guides

Ideal Boiler Status C

The "Status C" on an Ideal boiler's display simply indicates that the boiler is operating...

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Ideal Boiler Status 00 - How to Fix

20th May, 2026 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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How to Set Digital Timer on Boiler

20th May, 2026 Guides

How to Set Digital Timer on Bo...

A digital timer on a boiler is a control device that allows users to set specific times fo...

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How to Reset Vaillant Boiler

20th May, 2026 Guides

How to Reset Vaillant Boiler

The reset button on a Vaillant boiler typically has a small flame icon and can be found on...

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How To Improve EPC Rating

20th May, 2026 Guides

How To Improve EPC Rating

An Energy Performance Certificate (EPC) rates how energy efficient a property is. The rati...

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How to Connect Wireless Thermostat to Boiler

20th May, 2026 Guides

How to Connect Wireless Thermo...

Connecting a wireless thermostat to a boiler can help improve heating efficiency and contr...

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How to Adjust Water Temperature on Boiler

20th May, 2026 Guides

How to Adjust Water Temperatur...

Boiler systems can vary, each with specific components and controls that affect how they o...

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How Often Should a Boiler Be Replaced?

20th May, 2026 Guides

How Often Should a Boiler Be R...

It's critical for homeowners to understand the lifespan of their boiler to maintain an eff...

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How much cheaper is a new boiler to run?

20th May, 2026 Guides

How much cheaper is a new boil...

New boilers are in fact much cheaper to run than old boilers, this is down to a number of...

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