Stephen Day profile photo

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.

LinkedIn

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 and Shower Issue Fixes

30th May, 2025 Guides

Boiler and Shower Issue Fixes

If you're experiencing issues with your boiler and shower, such as no hot water or low wat...

read article arrow Read Article
Vaillant F73 Error Code - How To Fix

30th May, 2025 Guides

Vaillant F73 Error Code - How...

The Vaillant F73 error code indicates a problem with the water pressure sensor, which can...

read article arrow Read Article
What is a Storage Combi Boiler?

30th May, 2025 Guides

What is a Storage Combi Boiler...

Storage combi boilers are a popular choice for homeowners who want the benefits of a combi...

read article arrow Read Article
Glow-Worm F29 Error Code - How To Fix

30th May, 2025 Guides

Glow-Worm F29 Error Code - How...

The Glow-Worm F29 error code indicates a loss of flame during operation, which can cause a...

read article arrow Read Article
Tips to Look After Your Heat Pump in Winter

30th May, 2025 Guides

Tips to Look After Your Heat P...

Heat pumps are an efficient and eco-friendly way to heat your home, but they can face chal...

read article arrow Read Article
Boiler Flow Temperature

30th May, 2025 Guides

Boiler Flow Temperature

Boiler flow temperature is an important factor in the performance and efficiency of your h...

read article arrow Read Article
Winter Radiator Checks

30th May, 2025 Guides

Winter Radiator Checks

Winter radiator checks are an essential part of preparing your heating system for the cold...

read article arrow Read Article
Are Biomass Boilers Worth it?

30th May, 2025 Guides

Are Biomass Boilers Worth it?

Biomass boilers are a sustainable and eco-friendly style of heating solution that can help...

read article arrow Read Article
How to Turn Off a Radiator

30th May, 2025 Guides

How to Turn Off a Radiator

Discover the comprehensive guide to understanding and turning off your radiator effectivel...

read article arrow Read Article
What Size Heat Pump Do I Need? How To Choose The Right Size Heat Pump

30th May, 2025 Guides

What Size Heat Pump Do I Need?...

Understanding the perfect heat pump size for your UK home is vital for efficiency and comf...

read article arrow Read Article
Heat Pump Maintenance

30th May, 2025 Guides

Heat Pump Maintenance

Welcome to iHeat, your trusted online boiler installation company! We are thrilled to intr...

read article arrow Read Article
What is a Limescale Reducer or Inhibitor?

30th May, 2025 Guides

What is a Limescale Reducer or...

Limescale can be a pesky problem, but one that can be easily solved with just a few simple...

read article arrow Read Article