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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

iHeat Support Gas Safety Week 2025

11th September, 2025 Guides

iHeat Support Gas Safety Week...

Gas Safety Week 2025 is an important annual event that raises awareness of the dangers of...

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Viessmann Vitodens 100-W Combi Boiler Review

04th September, 2025 Reviews

Viessmann Vitodens 100-W Combi...

This beast of a combi boiler is one of the most sought-after models from Viessmann

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Worcester Bosch Greenstar 2000 Boiler Review

04th September, 2025 Reviews

Worcester Bosch Greenstar 2000...

Worcester Bosch has a new range of condensing combi boilers, including the Worcester Bosch...

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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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Portable Vs Wall-Mounted Air Conditioning: Which Is Better?

19th August, 2025 Comparisons

Portable Vs Wall-Mounted Air C...

Portable and wall mounted air conditioning both have their own strengths and drawbacks dep...

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Worcester Bosch Greenstar CDi Compact Combi Review

15th August, 2025 Reviews

Worcester Bosch Greenstar CDi...

One of the most popular compact combi boilers on the market, here we take an in depth look...

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Worcester Bosch Boiler Reset

15th August, 2025 Guides

Worcester Bosch Boiler Reset

In tackling the nuances of Worcester boilers, it is imperative for homeowners to acquaint...

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What Is A Condensate Pipe?

15th August, 2025 Advice

What Is A Condensate Pipe?

The condensate pipe allows water to be safely drained away from your home, let's drill int...

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Navien Boiler Reviews

15th August, 2025 Reviews

Navien Boiler Reviews

Navien, a revered boiler manufacturer, has established a reputation for innovation and rel...

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Ferroli Boiler Prices

15th August, 2025 Reviews

Ferroli Boiler Prices

In this blog we will be exploring some of Italian heating giant Ferroli’s best boilers, ta...

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Most Economical Way to Use Central Heating UK

15th August, 2025 Guides

Most Economical Way to Use Cen...

Leaving the heating on low all day might seem like a way to avoid the chill without bursti...

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What temperature should my boiler be set at for central heating?

15th August, 2025 Guides

What temperature should my boi...

Boilers are the heartbeat of a home's central heating system, efficiently managing the bal...

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