Stephen Day profile photo

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.

LinkedIn

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

Do I Need A Boiler Service?

11th August, 2025 Advice

Do I Need A Boiler Service?

Does a boiler need an annual service? We run through boiler services and some frequently a...

read article arrow Read Article
Electric Boiler vs Gas Boiler

11th August, 2025 Comparisons

Electric Boiler vs Gas Boiler

In this article we will discuss the topic of different boiler types, specifically electric...

read article arrow Read Article
Worcester Bosch 8000 Boiler Review

11th August, 2025 Reviews

Worcester Bosch 8000 Boiler Re...

The Worcester Bosch 8000 boiler comes straight from one of the UK's best-selling boiler br...

read article arrow Read Article
Underfloor Heating with a Combi Boiler

11th August, 2025 Guides

Underfloor Heating with a Comb...

Integrating underfloor heating with existing combi boilers can be a practical option for m...

read article arrow Read Article
What Is A System Boiler?

11th August, 2025 Advice

What Is A System Boiler?

The best boiler for your home will be one that can meet the demands for hot water and cent...

read article arrow Read Article
Worcester Bosch Vs Viessmann Boilers

11th August, 2025 Comparisons

Worcester Bosch Vs Viessmann B...

Which boiler will come out the winner between these two powerhouse boiler manufactures!

read article arrow Read Article
Can A Combi Boiler Run Hot Water and Heating Simultaneously?

11th August, 2025 Advice

Can A Combi Boiler Run Hot Wat...

You’ve likely heard of a combi boiler before and you may even have one in your home, contr...

read article arrow Read Article
Best Combi Boilers For Kitchen Cupboards

11th August, 2025 Guides

Best Combi Boilers For Kitchen...

A combi (combination) boiler is a type of domestic boiler that ‘combines’ a home’s central...

read article arrow Read Article
What Is a Combi Boiler?

11th August, 2025 Reviews

What Is a Combi Boiler?

Is a combi boiler worth it? Would your home benefit from a combi boiler? We will find out....

read article arrow Read Article
Ideal Boilers - Vogue Range

08th August, 2025 Guides

Ideal Boilers - Vogue Range

The Ideal Boilers' Vogue Range stands out as a premium selection, consistent with the comp...

read article arrow Read Article
Ideal Boiler Status C

08th August, 2025 Guides

Ideal Boiler Status C

The "Status C" on an Ideal boiler's display simply indicates that the boiler is operating...

read article arrow Read Article
Baxi Boiler Reviews

08th August, 2025 Reviews

Baxi Boiler Reviews

Baxi, a significant player in the UK heating industry, has carved out a reputation for del...

read article arrow Read Article