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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

Boiler Installation Manchester

12th August, 2025 Guides

Boiler Installation Manchester

A comprehensive understanding of the process is essential to ensure that the installation...

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Vaillant Boilers Reviews

12th August, 2025 Reviews

Vaillant Boilers Reviews

Vaillant offers an extensive selection of boilers to cater to different household requirem...

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Boiler Warranties & Guarantees: Top UK Brands for Best Value

12th August, 2025 Guides

Boiler Warranties & Guarantees...

Boiler warranties and guarantees are essential aspects to consider when investing in a new...

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Hive Alfen Eve S Line EV Charger Review

12th August, 2025 Reviews

Hive Alfen Eve S Line EV Charg...

The Hive Alfen Eve S-Line EV Charger emerges as a reliable solution for home charging, mar...

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Why is My Radiator So Noisy?

12th August, 2025 Guides

Why is My Radiator So Noisy?

Radiators can emit a variety of sounds, each indicating a different potential issue within...

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Boiler Hacks: Boost Performance & Savings

12th August, 2025 Guides

Boiler Hacks: Boost Performanc...

Boiler hacks are simple tricks and tips that can help you save money on your heating bills...

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How many hours should heating be on in the UK?

12th August, 2025 Guides

How many hours should heating...

Summary sentence for the blog: Learn the optimal duration for heating usage in the UK with...

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What is a Heat Exchanger?

11th August, 2025 Guides

What is a Heat Exchanger?

Heat exchangers are pivotal devices within a boiler system, playing a crucial role in tran...

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Vaillant Air Source Heat Pumps

11th August, 2025 Guides

Vaillant Air Source Heat Pumps

Air source heat pumps can be an extremely cost effective and efficient method of heating y...

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Navien NCB 300 Boiler Review

11th August, 2025 Reviews

Navien NCB 300 Boiler Review

Unlocking the Efficiency and Value of the Navien NCB 300 Boiler: A Comprehensive Guide for...

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Best Regular (Heat-Only) Boilers in 2025

11th August, 2025 Guides

Best Regular (Heat-Only) Boile...

Here at iHeat we’re experts in anything boilers, and understand at times the central heati...

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Most Efficient Combi Boiler to Save Money

11th August, 2025 Guides

Most Efficient Combi Boiler to...

Combi boilers are celebrated for their energy efficiency and compact size, a departure fro...

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