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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

Boiler Installation Cost Calculator

03rd February, 2026 Guides

Boiler Installation Cost Calcu...

Unlock the insights you need to estimate boiler costs in the UK accurately. Our comprehens...

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Boilers on Finance - The Best Pay Monthly and 0% Interest Deal

03rd February, 2026 Guides

Boilers on Finance - The Best...

Buying a boiler on finance can be hard with all the different options available. Let us ex...

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The Benefits of Using a Hive Thermostat for Your Smart Home

03rd February, 2026 Guides

The Benefits of Using a Hive T...

If you're looking to upgrade your home to a smart home, one of the best investments you ca...

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Baxi Platinum+ System Boiler Review

03rd February, 2026 Reviews

Baxi Platinum+ System Boiler R...

At iHeat, we pride ourselves on offering the finest heating solutions to our customers. To...

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What is a Smart Home and Smart Boiler?

03rd February, 2026 Guides

What is a Smart Home and Smart...

Smart boilers are an innovative technology that can help homeowners save money on their en...

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Boiler Warranties & Guarantees: Top UK Brands for Best Value

02nd February, 2026 Guides

Boiler Warranties & Guarantees...

Boiler warranties and guarantees are essential aspects to consider when investing in a new...

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Is it Cheaper to Replace Your Boiler in Summer?

02nd February, 2026 Guides

Is it Cheaper to Replace Your...

You may be wondering when the best time to replace your old, inefficient boiler is, and wh...

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Baxi Boiler E133 Error Code

02nd February, 2026 Guides

Baxi Boiler E133 Error Code

Understanding boiler error codes is essential in determining the proper course of action....

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Ideal Boiler Status P How to Fix

02nd February, 2026 Guides

Ideal Boiler Status P How to F...

Understanding the reasons behind the Status P error is essential for fixing it promptly. T...

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Alpha E-Tec Plus Boiler Review

02nd February, 2026 Reviews

Alpha E-Tec Plus Boiler Review

The Alpha E-Tec Plus Boiler is proving extermely popular, read through our expert opinion...

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Alpha E-Tec Combi Boiler Review

02nd February, 2026 Reviews

Alpha E-Tec Combi Boiler Revie...

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

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Best Boiler Brands in the UK (2026) Top Manufacturers

02nd February, 2026 Guides

Best Boiler Brands in the UK (...

Choosing the best boiler brand depends on your home size, budget, and how reliable you wan...

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