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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 Does Boiler ErP mean? - Energy Efficiency Guide

20th May, 2026 Advice

What Does Boiler ErP mean? - E...

When it comes to buying a new boiler, there can be some unfamiliar terms or phrases that d...

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Boiler Control Panel

20th May, 2026 Guides

Boiler Control Panel

A boiler control panel is the interface that allows users to interact with their heating s...

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Best Eco Friendly Boilers for 2026

20th May, 2026 Guides

Best Eco Friendly Boilers for...

The UK Government has set out its net-zero carbon emissions by 2050 target and have starte...

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Baxi Platinum+ System Boiler Review

20th May, 2026 Reviews

Baxi Platinum+ System Boiler R...

At iHeat, we pride ourselves on offering the finest heating solutions to our customers. To...

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Baxi Megaflo Compact System - Boiler Review

20th May, 2026 Guides

Baxi Megaflo Compact System -...

The Baxi Megaflo Compact System boiler is a high-efficiency heating solution, designed wit...

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Are System Boilers Still Used in 2026?

20th May, 2026 Guides

Are System Boilers Still Used...

System boilers have significantly evolved, featuring cutting-edge technology that enhances...

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Are Biomass Boilers Worth it?

20th May, 2026 Guides

Are Biomass Boilers Worth it?

Biomass boilers are a sustainable and eco-friendly style of heating solution that can help...

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Alternatives to Gas Boilers: What are Your Options?

20th May, 2026 Guides

Alternatives to Gas Boilers: W...

As the UK moves toward a low-carbon future, switching from traditional gas boilers is beco...

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Alpha E-Tec Plus Boiler Review

20th May, 2026 Reviews

Alpha E-Tec Plus Boiler Review

The Alpha E-Tec Plus Boiler is proving extermely popular, read through our expert opinion...

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Alpha E-Tec Hybrid Heat Pump

20th May, 2026 Advice

Alpha E-Tec Hybrid Heat Pump

You may have heard of a heat pump, you probably have heard of a boiler, you probably have...

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Alpha E-Tec Combi Boiler Review

20th May, 2026 Reviews

Alpha E-Tec Combi Boiler Revie...

Here we will review the Alpha E-Tec boiler, specifically in its capacity and whether or no...

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Worcester Bosch Boiler E9 Fault

10th April, 2026 Guides

Worcester Bosch Boiler E9 Faul...

E9 usually means your Worcester boiler has overheated or is struggling to move heat throug...

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