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

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...

read article arrow Read Article
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...

read article arrow Read Article
Boiler Electrodes

30th May, 2025 Guides

Boiler Electrodes

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

read article arrow Read Article
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...

read article arrow Read Article
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...

read article arrow Read Article
Different Types of Radiators

30th May, 2025 Guides

Different Types of Radiators

Radiators come in various types and materials, offering different benefits. Choosing the r...

read article arrow Read Article
Header Tank Overflowing

30th May, 2025 Guides

Header Tank Overflowing

A header tank, also known as a feed and expansion tank, serves an important role in an ope...

read article arrow Read Article
What Temperature Should Hot Water Be At The Tap?

30th May, 2025 Guides

What Temperature Should Hot Wa...

Maintaining the ideal hot water temperature in your home or building is essential for safe...

read article arrow Read Article
ATAG Boiler Error Codes - How To Fix

30th May, 2025 Guides

ATAG Boiler Error Codes - How...

When an ATAG boiler displays an error code, the meaning behind each code provides insight...

read article arrow Read Article
iHeat Awarded Iconic Which? Trusted Trader Accreditation

30th May, 2025 News

iHeat Awarded Iconic Which? Tr...

Receiving the Which? Trusted Trader Accreditation is just the beginning. At iHeat, we unde...

read article arrow Read Article
Electric Space Heaters - Bad Idea?

30th May, 2025 Guides

Electric Space Heaters - Bad I...

Gas heating systems are often more economical for households as natural gas is generally c...

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