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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

Different Types of Radiators

30th May, 2025 Guides

Different Types of Radiators

Radiators come in various types and materials, offering different benefits. Choosing the r...

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S Plan Heating System

30th May, 2025 Guides

S Plan Heating System

An S-Plan heating system is a type of central heating system that provides efficient contr...

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Header Tank Overflowing

30th May, 2025 Guides

Header Tank Overflowing

A header tank, also known as a feed and expansion tank, serves an important role in an ope...

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Egg Timer on Vaillant Boiler

30th May, 2025 Guides

Egg Timer on Vaillant Boiler

The egg timer symbol on a Vaillant boiler signifies the activation of the anti-cycling fun...

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Plumber and Heating Engineer - What's the Difference?

30th May, 2025 Guides

Plumber and Heating Engineer -...

When deciding whether to call a plumber or a heating engineer, it’s important to know what...

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Ideal Room Temperature

30th May, 2025 Guides

Ideal Room Temperature

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

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What Temperature Should Hot Water Be At The Tap?

30th May, 2025 Guides

What Temperature Should Hot Wa...

Maintaining the ideal hot water temperature in your home or building is essential for safe...

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Boxing In A Boiler: How to Hide a Boiler in Kitchen

30th May, 2025 Guides

Boxing In A Boiler: How to Hid...

Hiding a boiler in the kitchen can enhance the room's aesthetic while maintaining function...

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Do Radiator Covers Block Heat?

30th May, 2025 Guides

Do Radiator Covers Block Heat?

We'll be exploring what radiator covers are, whether they're necessary, and if you really...

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Vaillant Boiler Parts 2025

30th May, 2025 Guides

Vaillant Boiler Parts 2025

Vaillant boilers use a variety of parts to ensure efficient operation. This section looks...

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How to Soundproof a Boiler Cupboard

30th May, 2025 Guides

How to Soundproof a Boiler Cup...

From adding insulation to sealing gaps, there are both DIY and professional methods availa...

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How to Repressurise a Baxi Boiler

30th May, 2025 Guides

How to Repressurise a Baxi Boi...

Repressurising a Baxi boiler means restoring the correct water pressure inside the boiler...

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