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

Heat Pumps For Flats: Essential Information

20th May, 2026 Advice

Heat Pumps For Flats: Essentia...

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

read article arrow Read Article
Ground Source Heat Pump Servicing Cost

20th May, 2026 Guides

Ground Source Heat Pump Servic...

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

read article arrow Read Article
Ground Source Heat Pump Installation

20th May, 2026 Guides

Ground Source Heat Pump Instal...

Ground source heat pumps (GSHPs) can be a great way to meet heating needs for both homes a...

read article arrow Read Article
Ground Source Heat Pump Efficiency

20th May, 2026 Guides

Ground Source Heat Pump Effici...

While GSHPs are beneficial, several factors can affect their performance. Proper installat...

read article arrow Read Article
Electric Boiler Vs Heat Pump

20th May, 2026 Comparisons

Electric Boiler Vs Heat Pump

Heat pumps capture heat from the air or ground. They are highly efficient, often achieving...

read article arrow Read Article
Do Heat Pumps Work in Cold Weather?

20th May, 2026 Guides

Do Heat Pumps Work in Cold Wea...

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

read article arrow Read Article
Are Heat Pumps Noisy?

20th May, 2026 Guides

Are Heat Pumps Noisy?

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

read article arrow Read Article
Ground source heat pumps vs air source heat pumps

20th May, 2026 Comparisons

Ground source heat pumps vs ai...

Deciding between air source and ground source heat pumps depends on various factors. Homeo...

read article arrow Read Article
Air Source Heat Pump Service

20th May, 2026 Guides

Air Source Heat Pump Service

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

read article arrow Read Article
The Pros & Cons of Air Source Heat Pumps in 2026

20th May, 2026 Guides

The Pros & Cons of Air Source...

Air Source Heat Pumps have become a popular choice for renewable heating in the UK. They e...

read article arrow Read Article
Air Source Heat Pump Grant 2026

20th May, 2026 Guides

Air Source Heat Pump Grant 202...

An air source heat pump (ASHP) is a device that transfers heat from the outside air to pro...

read article arrow Read Article
Landlord Boiler Responsibility, Service & Maintenance Guide

20th May, 2026 Advice

Landlord Boiler Responsibility...

Having a broken boiler is a stressful ordeal for anyone but when you live in a rented prop...

read article arrow Read Article