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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

RCD - Residual Current Device Guide

30th May, 2025 Guides

RCD - Residual Current Device...

An RCD, or Residual Current Device, is an electrical safety mechanism that detects when el...

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Ideal Boiler Status P How to Fix

30th May, 2025 Guides

Ideal Boiler Status P How to F...

Understanding the reasons behind the Status P error is essential for fixing it promptly. T...

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How To Improve EPC Rating

30th May, 2025 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 Adjust Water Temperature on Boiler

30th May, 2025 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 to Set Digital Timer on Boiler

30th May, 2025 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 Efficient Is My Boiler?

30th May, 2025 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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Who Qualifies for a Boiler Grant in 2025?

30th May, 2025 Guides

Who Qualifies for a Boiler Gra...

Boiler grants in the UK assist homeowners in upgrading heating systems to more efficient m...

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Is It Safe to Turn Off a Combi Boiler?

30th May, 2025 Guides

Is It Safe to Turn Off a Combi...

Turning off a combi boiler can be safe, but certain factors should be considered.

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What Causes Boiler Corrosion and How to Prevent It?

30th May, 2025 Guides

What Causes Boiler Corrosion a...

Boiler corrosion happens when metal parts in boilers break down due to chemical reactions....

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Boiler Overheating

30th May, 2025 Guides

Boiler Overheating

When a boiler overheats, it can cause significant issues. Components inside can get damage...

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The Benefits of Zoned Heating for Energy Savings

30th May, 2025 Guides

The Benefits of Zoned Heating...

Zoned heating is a way to improve efficiency in heating and cooling systems. It divides a...

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How To Free A Stuck Diverter Valve In Your Boiler - An Expert Guide

30th May, 2025 Guides

How To Free A Stuck Diverter V...

A diverter valve is an essential component of a combi boiler. Its main job is to control t...

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