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

Why Gas Safety Matters

03rd November, 2025 News

Why Gas Safety Matters

At iHeat, we take gas safety very seriously, ensuring that all our boiler installers are G...

read article arrow Read Article
Which Boiler Brands Do iHeat Stock?

03rd November, 2025 Advice

Which Boiler Brands Do iHeat S...

At iHeat we want our customers to receive only the best boilers available, that’s why we s...

read article arrow Read Article
Ground Source Heat Pump Costs

03rd November, 2025 Guides

Ground Source Heat Pump Costs

Heat pumps are an extremely popular topic of conversation amongst homeowners and heating i...

read article arrow Read Article
Heat Pumps vs Modern Gas Boilers

03rd November, 2025 Comparisons

Heat Pumps vs Modern Gas Boile...

In times of eye-watering energy prices and home heating bills, some debate which type of h...

read article arrow Read Article
Which Boiler is Best for an Apartment or Flat?

03rd November, 2025 Advice

Which Boiler is Best for an Ap...

When your old boiler breaks down and it comes time to replace it with a new one, it may se...

read article arrow Read Article
How To Fix Sludge in Radiators

28th October, 2025 Advice

How To Fix Sludge in Radiators

If you’ve noticed your energy bills rising recently, this could be down to a number of rea...

read article arrow Read Article
Back Boiler Replacement Cost in the UK

27th October, 2025 Guides

Back Boiler Replacement Cost i...

Should you replace that beaten up old back boiler and get with the times?

read article arrow Read Article
Alpha E-Tec Combi Boiler Review

27th October, 2025 Reviews

Alpha E-Tec Combi Boiler Revie...

Here we will review the Alpha E-Tec boiler, specifically in its capacity and whether or no...

read article arrow Read Article
What is an Immersion Heater and What Does it Cost?

27th October, 2025 Advice

What is an Immersion Heater an...

Everything UK homeowners need to know about immersion heaters and running costs.

read article arrow Read Article
Megaflow System - What is a Megaflow System and How Much do they Cost?

27th October, 2025 Guides

Megaflow System - What is a Me...

Unveiling the Power of Megaflow: Transforming Your Home's Heating and Hot Water Experience

read article arrow Read Article
Boiler Leaking Water? (How to Fix a Leaking Boiler)

27th October, 2025 Advice

Boiler Leaking Water? (How to...

If your boiler is leaking water, it’s likely due to pressure or worn parts. Acting fast he...

read article arrow Read Article
What Is A MagnaCleanse?

22nd October, 2025 Advice

What Is A MagnaCleanse?

The heating system in your home is a valuable tool that is used on a regular basis, most l...

read article arrow Read Article