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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

How much does a new boiler cost in the UK

05th January, 2026 Guides

How much does a new boiler cos...

Based on data from over 7000 boiler installations completed by iHeat in the past 12 months...

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Best Home EV Chargers

05th January, 2026 Guides

Best Home EV Chargers

Electric vehicles (EVs) have transformed the way we think about personal transportation, n...

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Most Energy Efficient Boilers in 2026 (UK Guide)

05th January, 2026 Guides

Most Energy Efficient Boilers...

The efficiency of your boiler may not be something you pay much attention to, but is it co...

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Best UK Boiler Cover 2026

05th January, 2026 Guides

Best UK Boiler Cover 2026

A broken boiler often means a cold house with no access to heating or hot water, leaving m...

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Best Oil Boilers 2026

05th January, 2026 Guides

Best Oil Boilers 2026

Various benefits come from having an oil boiler installed in your home, and this could be...

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The Best Smart Thermostats in the UK 2026

05th January, 2026 Guides

The Best Smart Thermostats in...

A smart thermostat can make a massive difference to your home and can be one of the best...

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Best Eco Friendly Boilers for 2026

05th January, 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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Vokera Boilers Prices 2026

05th January, 2026 Reviews

Vokera Boilers Prices 2026

Vokera is an established and innovative brand, providing highly efficient home heating, wh...

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Heat Pump Pros and Cons - A Complete Guide for UK 2026

05th January, 2026 Comparisons

Heat Pump Pros and Cons - A Co...

As one of the hottest topics in the industry, heat pumps are being contemplated by homeown...

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How Much Does a Heat Pump Cost? A 2026 Guide

05th January, 2026 Guides

How Much Does a Heat Pump Cost...

Explore the different types, costs, and efficiency of heat pumps in this blog post, illumi...

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Clean Heat Market Mechanism (CHMM) 2026: Updated

05th January, 2026 News

Clean Heat Market Mechanism (C...

The Clean Heat Market Mechanism is a UK policy making boiler manufacturers sell more heat...

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UK Government Boiler Scrappage Scheme 2026

05th January, 2026 Guides

UK Government Boiler Scrappage...

The UK Boiler Scrappage Scheme was a government initiative designed to promote the upgrade...

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