The Cheapest 5-Year Guarantee
Heat Only Boiler in the UK?
Meet the Glow-worm Easicom 3 25kW — British Gas heritage, Vaillant Group engineering, and a 5-year warranty at a price that undercuts the market. Exclusively stocked at GetPlumb.
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If you're searching for a cheap heat only boiler with a long guarantee, you're in the right place. The Glow-worm Easicom 3 25kW is one of the most affordable boilers on the UK market that still carries a full 5-year manufacturer's warranty — and it's backed by the engineering might of the Vaillant Group, one of Europe's most respected heating manufacturers.
Glow-worm Easicom 3 — 25kW Heat Only Gas Boiler
- 5-Year Manufacturer's Guarantee
- ErP A-Rated · 94% Efficiency
- Vaillant Group Quality
- 20% Hydrogen Ready
- Rear, Horizontal & Vertical Flue Options
- Fast UK Delivery · Price Match Promise
Who Makes Glow-worm Boilers?
Glow-worm is one of Britain's most trusted heating brands, with roots going back over 90 years. Today, Glow-worm is part of the Vaillant Group — the same premium European manufacturer behind the iconic Vaillant boiler range. This means when you buy a Glow-worm, you're getting access to the same rigorous quality control, cutting-edge R&D, and long-term parts availability that premium boiler buyers expect, but at a far more accessible price point.
Think of it this way: Glow-worm is the smart buyer's choice — premium manufacturer, competitive price. The Easicom 3 is the clearest example of this value proposition in action.
Did you know? The Vaillant Group is one of the world's largest heating technology companies, with over 150 years of engineering history. Buying a Glow-worm means you're backed by that same industrial expertise — at a fraction of the premium brand price.
Why Choose a Heat Only Boiler?
Heat only boilers (also known as conventional or regular boilers) are the traditional choice for homes that already have a hot water cylinder and a cold water storage tank in the loft. They are often the best replacement option when:
Glow-worm Easicom 3 — Key Features
The Easicom 3 is a no-nonsense, high-efficiency heat only boiler designed for straightforward installation and reliable long-term performance. Here's what makes it stand out:
Built to a Higher Standard Inside
Inside the Easicom 3 — Vaillant Group engineering quality
Open up the Easicom 3 and you'll find clean, well-organised internals built for longevity and easy servicing. The quality of the heat exchanger, controls, and pipework reflects the Vaillant Group's commitment to reliability — components that are designed to last the full 5-year warranty period and well beyond.
Rear Flue Capability — Rarely Found at This Price
One of the standout features of the Easicom 3 that often gets overlooked: it supports a rear flue exit. This is a significant advantage that many budget boilers simply don't offer. A rear flue means the boiler can be installed flush against a rear-facing external wall without needing the flue to exit from the side — saving space, reducing pipe runs, and making for a much neater installation. For engineers and homeowners working with tight kitchen or utility cupboard layouts, this flexibility is genuinely valuable and highly unusual at this price point.
Full Technical Specifications
| Specification | Detail |
|---|---|
| Warranty | 5 Years (Manufacturer) |
| Output | 25 kW |
| Efficiency Rating | ErP A (94%) |
| Fuel Type | Natural Gas |
| Flue Options | Horizontal, Vertical & Rear Exit |
| Hydrogen Ready | Yes — up to 20% blend |
| Boiler Type | Heat Only (Regular / Conventional) |
| Dimensions (H × W × D) | 600 × 375 × 280 mm |
| Weight | 23.5 kg |
| Colour | White |
| Manufacturer | Glow-worm (Vaillant Group) |
| Part Number | 0010020907 |
The Cheapest Price in the UK — Guaranteed
At GetPlumb, we're confident we offer the cheapest price on the Glow-worm Easicom 3 in the UK. We source directly and pass the savings straight on to our customers — no middlemen, no inflated margins.
GetPlumb Price Match Promise
Found the Glow-worm Easicom 3 cheaper somewhere else? We'll match it. At GetPlumb, we believe every customer deserves the best possible price on quality heating equipment. Simply contact our team at 0118 958 8882 or email online@getplumb.co.uk and we'll beat or match any legitimate UK price — no hassle, no quibble.
Why Buy From GetPlumb?
Don't Forget Your Flue Kit
Your Glow-worm Easicom 3 will require a compatible flue to complete the installation. GetPlumb stocks the official Glow-worm flue kits to ensure a perfect, warranty-compliant fit. Choose the right type for your property below:
Horizontal Flue Kit
The standard choice for most installations. Exits through an external wall — ideal when a rear or side wall is accessible near the boiler.
View Horizontal Flue →Vertical Roof Terminal
The right choice when a wall exit isn't possible. The flue rises vertically through the ceiling and roof — perfect for internal boiler cupboards.
View Vertical Flue →💡 Not sure which flue you need? Call our expert team on 0118 958 8882 and we'll advise you free of charge.
Frequently Asked Questions
The Verdict
The Glow-worm Easicom 3 25kW Heat Only Boiler is a genuinely outstanding deal. You're getting a 5-year warranty, ErP A-rated efficiency, hydrogen-ready technology, rear flue capability, and the manufacturing pedigree of the Vaillant Group — all at one of the lowest prices in the UK market.
Whether you're a homeowner looking to upgrade an ageing system or a heating engineer sourcing a cost-effective, quality-backed solution for a customer, the Easicom 3 delivers exceptional value without compromise.
And with GetPlumb's Price Match Promise, you can buy with total confidence knowing you're getting the best possible price.