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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

Why Buying a Budget Boiler May Cost You More in The Long-Run

20th May, 2026 Advice

Why Buying a Budget Boiler May...

Finding out your boiler needs replacing can be incredibly frustrating, especially during t...

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Boiler Warranty Invalid? Warranty Checklist

20th May, 2026 Guides

Boiler Warranty Invalid? Warra...

This article explains what a boiler warranty covers, what actions can invalidate it, and h...

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Boiler Upgrade Scheme

20th May, 2026 Guides

Boiler Upgrade Scheme

The Boiler Upgrade Scheme is a pivotal initiative aimed at supporting the decarbonisation...

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Boiler Service Bolton

20th May, 2026 Guides

Boiler Service Bolton

Boiler servicing comprises a set of inspections and tests conducted by a qualified enginee...

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UK Government Boiler Scrappage Scheme 2026

20th May, 2026 Guides

UK Government Boiler Scrappage...

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

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Boiler Pump Not Working

20th May, 2026 Guides

Boiler Pump Not Working

A boiler pump is a vital part of a heating system. It ensures water is circulated efficien...

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Boiler Plus - 2026 Guide

20th May, 2026 Guides

Boiler Plus - 2026 Guide

Boiler Plus is a set of energy efficiency standards introduced by the UK government. It ai...

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Boiler Overheating

20th May, 2026 Guides

Boiler Overheating

When a boiler overheats, it can cause significant issues. Components inside can get damage...

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Boiler Installation Bolton

20th May, 2026 Guides

Boiler Installation Bolton

The expense incurred from installing a boiler can vary significantly based on factors such...

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Boiler in Bathroom

20th May, 2026 Guides

Boiler in Bathroom

Installing a boiler in a bathroom can be safe and legal in the UK, but specific regulation...

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Boiler Filter - Mega Guide

20th May, 2026 Guides

Boiler Filter - Mega Guide

A boiler filter is an essential component for maintaining the efficiency and longevity of...

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How To Diagnose Boiler Fan Issues And Fix Them Safely

20th May, 2026 Guides

How To Diagnose Boiler Fan Iss...

A boiler fan is an important part of modern boilers. It ensures proper combustion by pushi...

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