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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

What Is A MagnaCleanse?

22nd October, 2025 Advice

What Is A MagnaCleanse?

The heating system in your home is a valuable tool that is used on a regular basis, most l...

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Fix a Frozen Boiler Condensate Pipe

22nd October, 2025 Advice

Fix a Frozen Boiler Condensate...

A frozen condensate pipe blocks the waste-water outlet from a modern boiler. This causes t...

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Boiler Safety (Tips for Homeowners)

16th October, 2025 Guides

Boiler Safety (Tips for Homeow...

Critical boiler safety tips that every homeowner should know, ensuring the safe operation...

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Common Viessmann Boiler Error Codes

15th October, 2025 Guides

Common Viessmann Boiler Error...

Read the most common Viessmann boiler error codes and discover how you could fix them.

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How to Drain a Combi Boiler

14th October, 2025 Advice

How to Drain a Combi Boiler

There are a few reasons why you might want to drain your combi boiler. For example, perhap...

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Vaillant Boiler Prices

10th October, 2025 Guides

Vaillant Boiler Prices

As an online boiler installation company, iHeat provides an in-depth look at Vaillant boil...

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Alpha E-Tec NX Combi Boiler Review

04th September, 2025 Reviews

Alpha E-Tec NX Combi Boiler Re...

As a leading online boiler installation company, iHeat is committed to providing customers...

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Worcester Bosch Greenstar 8000 Life (Combi) Boiler Review

15th August, 2025 Reviews

Worcester Bosch Greenstar 8000...

Thinking of buying a Worcester Bosch Greenstar 8000 Life Boiler? Find out iHeat's opinion...

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How to Reset Viessmann Boiler

12th August, 2025 Guides

How to Reset Viessmann Boiler

Resetting a boiler is an important step when dealing with various system faults or issues....

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Hive Alfen Eve S Line EV Charger Review

12th August, 2025 Reviews

Hive Alfen Eve S Line EV Charg...

The Hive Alfen Eve S-Line EV Charger emerges as a reliable solution for home charging, mar...

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Boiler Timer Guide

11th August, 2025 Guides

Boiler Timer Guide

A boiler timer is an essential component of your heating system, allowing you to control w...

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Ideal Logic+ Heat Only Boiler Review

11th August, 2025 Reviews

Ideal Logic+ Heat Only Boiler...

Today we will be reviewing the Ideal Logic + heat only boiler, specifically in its 18kW ca...

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