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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

Can You Pair Radiators With Heat Pumps?

30th May, 2025 Guides

Can You Pair Radiators With He...

Choosing the right radiator for a heat pump is crucial. The performance can vary depending...

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Are Heat Pumps Noisy?

30th May, 2025 Guides

Are Heat Pumps Noisy?

Heat pumps have become a popular choice for energy-efficient heating and cooling. A common...

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Air Source Heat Pump Service

30th May, 2025 Guides

Air Source Heat Pump Service

An air source heat pump should generally be serviced once a year. Regular servicing ensure...

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How to Properly Ventilate a Boiler Room for Safety

30th May, 2025 Guides

How to Properly Ventilate a Bo...

Proper ventilation in a boiler room is essential for safety and efficiency. Without adequa...

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Boiler Electrodes

30th May, 2025 Guides

Boiler Electrodes

Boiler electrodes are key components in gas, combi, and electric boilers. They serve cruci...

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RCD - Residual Current Device Guide

30th May, 2025 Guides

RCD - Residual Current Device...

An RCD, or Residual Current Device, is an electrical safety mechanism that detects when el...

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Is It Safe to Turn Off a Combi Boiler?

30th May, 2025 Guides

Is It Safe to Turn Off a Combi...

Turning off a combi boiler can be safe, but certain factors should be considered.

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What Causes Boiler Corrosion and How to Prevent It?

30th May, 2025 Guides

What Causes Boiler Corrosion a...

Boiler corrosion happens when metal parts in boilers break down due to chemical reactions....

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Does Turning Down Radiators Save Gas & Money?

30th May, 2025 Guides

Does Turning Down Radiators Sa...

While it seems logical that using less heating could save money, the effectiveness of this...

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ESI Thermostat Troubleshooting UK

30th May, 2025 Guides

ESI Thermostat Troubleshooting...

ESI thermostats are designed to help maintain a comfortable temperature in homes and offic...

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How Much Energy/Electricity Do My Appliances Use? Expert advice

30th May, 2025 Guides

How Much Energy/Electricity Do...

Different appliances in your home use various amounts of electricity. Understanding this c...

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Does a Gas Boiler Use Electricity?

30th May, 2025 Guides

Does a Gas Boiler Use Electric...

Gas boilers primarily run on natural gas or liquefied petroleum gas (LPG) to heat homes. N...

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