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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

Combi Boiler Pipes Explained

29th May, 2026 Guides

Combi Boiler Pipes Explained

Understanding the key components of combi boiler pipework is essential for making informed...

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Glow Worm Boiler Pressure

29th May, 2026 Guides

Glow Worm Boiler Pressure

To keep your Glow-Worm boiler working properly, it's essential to maintain the right press...

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Pressure Release Valve Boiler

29th May, 2026 Guides

Pressure Release Valve Boiler

A pressure release valve (PRV) on a boiler is a critical safety component ensuring that th...

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What is Boiler Commissioning?

29th May, 2026 Guides

What is Boiler Commissioning?

Boiler commissioning is an essential part of installing a new boiler system. It involves a...

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Repressurise Vaillant Boiler

29th May, 2026 Guides

Repressurise Vaillant Boiler

Low pressure in a Vaillant boiler is a common issue for many UK households. It affects com...

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Ideal Boiler Status P How to Fix

29th May, 2026 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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Boiler Repair Near Me

29th May, 2026 Guides

Boiler Repair Near Me

Boiler repair involves addressing issues with a boiler system, ensuring it functions safel...

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What is a Gas Supply Pipe?

29th May, 2026 Guides

What is a Gas Supply Pipe?

A gas supply pipe is an essential part of any property with a gas boiler. Its main job is...

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Oil Boiler Not Firing Up - Common Causes and fixes

29th May, 2026 Guides

Oil Boiler Not Firing Up - Com...

An oil boiler often refuses to start due to common issues like empty oil tanks, power supp...

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What Causes Boiler Corrosion and How to Prevent It?

29th May, 2026 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 Manifold - Role, Function, and Cost Guide

29th May, 2026 Guides

Boiler Manifold - Role, Functi...

A boiler manifold is a vital component in many heating systems. It acts as the central hub...

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Where is the Boiler Fuse Located?

29th May, 2026 Guides

Where is the Boiler Fuse Locat...

A boiler fuse is a small yet crucial electrical component found within a boiler system. It...

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