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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

Navien Combi Boiler Costs

08th August, 2025 Guides

Navien Combi Boiler Costs

Navien combi boilers have secured a competitive edge by providing both central heating and...

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Which Worcester Bosch Boiler is Best?

08th August, 2025 Comparisons

Which Worcester Bosch Boiler i...

Choosing the right boiler for your property is crucial to ensure optimal heating efficienc...

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What is a Thermocouple?

07th August, 2025 Guides

What is a Thermocouple?

A thermocouple is a critical component in a boiler system. It acts as a safety device, ens...

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Worcester Bosch Boiler No Hot Water

07th August, 2025 Guides

Worcester Bosch Boiler No Hot...

When homeowners encounter a lack of hot water from their Worcester Bosch boiler, it's ofte...

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Most Efficient Way to Run Air Source Heat Pump

01st August, 2025 Guides

Most Efficient Way to Run Air...

Setting the right temperature with an air source heat pump is important for comfort and ef...

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Heat Pumps For Flats: Essential Information

01st August, 2025 Advice

Heat Pumps For Flats: Essentia...

Heat pumps can be installed in flats, but there are some important factors to consider.

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What is an EV Charger?

31st July, 2025 Guides

What is an EV Charger?

Electric vehicle (EV) charging is integral to the EV ownership experience, affecting conve...

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Evec EV Charger Review - Type 1 & Type 2, Single Phase, Untethered VEC01

31st July, 2025 Reviews

Evec EV Charger Review - Type...

The Evec EV Charger VEC01 emerges as a practical solution in the realm of electric vehicle...

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Worcester Bosch Climate 3200i - Review

30th July, 2025 Reviews

Worcester Bosch Climate 3200i...

The Worcester Bosch Climate 3200i is a modern air conditioning unit designed for UK homes....

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Daikin Sensira Air Conditioning Unit Review

30th July, 2025 Reviews

Daikin Sensira Air Conditionin...

The Daikin Sensira air conditioning unit boasts a blend of compact design with top-notch f...

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Air Conditioning Costs

30th July, 2025 Guides

Air Conditioning Costs

In discussing air conditioning, it's important to understand the different systems availab...

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Air Conditioning Unit - Common Errors and Fixes

29th July, 2025 Guides

Air Conditioning Unit - Common...

Air conditioning systems are vital for maintaining a comfortable indoor environment, espec...

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