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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

Viessmann Vitodens - A Guide to the Range

30th May, 2025 Reviews

Viessmann Vitodens - A Guide t...

Viessmann is one of the best and most reliable boiler brands on the market with their adva...

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Ideal Temperature at Home

30th May, 2025 Advice

Ideal Temperature at Home

Finding and maintaining the right temperature in your home can feel like a constant battle...

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Diverter Valve

30th May, 2025 Advice

Diverter Valve

One of the most common reasons for heating and hot water to stop working properly is a fau...

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Boiler Inactive Over Summer? How to Avoid Needing Repairs

30th May, 2025 Advice

Boiler Inactive Over Summer? H...

Over the summer months, many of us tend to use our central heating much less and sometimes...

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Hot Water Tank Thermostat

30th May, 2025 Guides

Hot Water Tank Thermostat

For most UK homes, setting the hot water tank thermostat between 60°C and 65°C provides a...

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Wall-mounted or floor-standing boiler?

30th May, 2025 Comparisons

Wall-mounted or floor-standing...

Choosing between a wall-mounted and a floor-standing boiler mostly depends on the type of...

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What is a Gas Supply Pipe?

30th May, 2025 Guides

What is a Gas Supply Pipe?

A gas supply pipe is an essential part of any property with a gas boiler. Its main job is...

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Ground Source Heat Pump Servicing Cost

30th May, 2025 Guides

Ground Source Heat Pump Servic...

Regular servicing of a ground source heat pump is essential to ensure its efficiency and l...

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Do Heat Pumps Work in Cold Weather?

30th May, 2025 Guides

Do Heat Pumps Work in Cold Wea...

As homeowners seek sustainable and cost-effective heating solutions, understanding the mec...

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Electric Boiler Service

30th May, 2025 Guides

Electric Boiler Service

Electric boilers are popular in many UK homes due to their efficiency and compatibility wi...

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What is Boiler Commissioning?

30th May, 2025 Guides

What is Boiler Commissioning?

Boiler commissioning is an essential part of installing a new boiler system. It involves a...

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How to Flush Central Heating System

30th May, 2025 Guides

How to Flush Central Heating S...

Flushing a central heating system means cleaning out the inside of the pipes, radiators, a...

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