Glow-worm Easicom3 Combi Boiler Cost with Installation

The Glow-worm Easicom is the entry-level combi in the Glow-worm range, manufactured within the Vaillant Group. That manufacturing background shows in the efficiency rating: at 94% ErP A-rated, the Easicom matches what boilers at significantly higher price points achieve, whilst selling for considerably less. Available in 24kW and 28kW, it suits smaller properties where budget is the priority and output demand is modest. 

Discover more of the Glow-worm Easicom combi specifications below:

Glow-worm Easicom3 Combi Product Table
	Available outputs	24kW	28kW
	Type	Combi	Combi
	Fuel	Gas	Gas
	Condensing	Yes	Yes
	Efficiency rating (%)	94	94
	ErP	A	A
	LPG compatible	No	No
	Standard guarantee	5 years
	Max output (kW)	24	28
	Flow rate (l/min)	10.0	11.7
	Mounting	Wall-mounted
	Dimensions (mm)	740 x 418 x 300
	Typical price (incl. VAT)	£700	£800
	Typical installation cost (incl. VAT)	£1,200
	Total cost	£1,900-£2,000

*Terms and conditions apply.

Glow-worm Easicom3 Combi overview

Glow-worm sits within the Vaillant Group, one of Europe’s largest heating manufacturers, and the Easicom is where the group’s engineering reaches its most accessible price point. 

It might just be the most cost efficient combi on the UK market: 94% ErP A-rated from a Vaillant Group plant, available for around £700 including flue. For a flat, small terrace, or two-bedroom home with a single bathroom and no LPG requirement, very little else comes close on value alone.

Two outputs are available, no LPG, a 5-year warranty, and a 740mm height – these are small limitations to weigh against the price. For properties where none of those constraints apply, the value argument is difficult to match.

Glow-worm Easicom3 Combi Range
Model output size	House size	Bathrooms	Radiators
24kW	Flats, 1-2 bedrooms	1	Up to 10
28kW	Small to medium homes, 2-3 bedrooms	1	Up to 12

Getting the output right matters as much as the boiler itself. The 24kW model delivers 10.0 l/min, adequate for a flat or small home with a single shower or bath in use at a time. The 28kW reaches 11.7 l/min, suitable for a two to three bedroom home with a single bathroom. Neither model is suited to two bathrooms in concurrent use – if that is a requirement, a system boiler with a cylinder is the better starting point.

Key benefits at a glance

• ErP A-rated efficiency (94% efficient)
• Competitive entry-level pricing 
• Clear LCD display with front-facing analogue clock and built-in timer
• Automotive-grade aluminium heat exchanger with four-sided cooling system
• 5-year standard warranty with Club Energy registration*
• Manufactured within the Vaillant Group
• Compatible with Glow-worm MiGo smart controls (sold separately)
• Hydrogen blend ready (up to 20%)

Glow-worm Easicom3 Combi technical specifications

What makes the Easicom interesting is the price and efficiency rating. The 94% ErP figure is the same efficiency as the Vaillant ecoFIT Pure, which typically costs £400-£500 more for the comparable output. 

Both are Vaillant Group products and both use aluminium heat exchangers to the same manufacturing standard. The Easicom achieves the efficiency through the group’s condensing technology; the trade-off is the output ceiling, LPG compatibility, and warranty length.

For landlords and homeowners fitting a natural gas boiler in a small property, the cost per unit of heat delivered is the number that counts most, and on that measure the Easicom is difficult to fault.

Output and efficiency ratings

Both models carry 94% ErP efficiency, the top band for gas boilers. As condensing boilers, they recover heat from exhaust gases that older non-condensing boilers expelled – the main source of the efficiency gain.

Under low-demand conditions the Easicom cycles on and off more frequently than boilers with wider modulation ratios. In practice this is most noticeable in smaller, well-insulated properties; in older homes with higher base heating demand it rarely registers.

Dimensions 

At 740mm tall, 418mm wide, and 300mm deep, the Easicom is larger than most competing combis. The standard for cupboard-fit combis is typically 700mm tall and around 280-295mm deep. The extra 40mm in height is the critical dimension to check before ordering: it fits in most base units without difficulty, but a minority of wall-mounted cupboards will not accommodate it. 

The 300mm depth keeps it in the cupboard-fit category, though with less margin than shallower alternatives such as the Glow-worm Micracom (270mm) or the Worcester Bosch CDi Compact (280mm).

Components included

The Easicom uses an automotive-grade aluminium heat exchanger with a four-sided cooling system. The four-sided design distributes thermal stress across the exchanger rather than concentrating it, which Glow-worm describes as reducing long-term fatigue on the component. The heat exchanger carries a 5-year component guarantee when registered with Club Energy.

The front panel includes a bright LCD display and an analogue clock with a built-in timer, allowing basic time programming without a separate thermostat – making it intuitive to use. 

For homeowners who want app control, the MiGo Link gateway – sold separately at around £80-£100 – enables remote scheduling and weather compensation via the MiGo app. Third-party thermostats including Hive, Nest, and Tado are also compatible.

Prices and installation costs

The Glow-worm Easicom costs approximately £700 for the 24kW and £800 for the 28kW. With installation costs of around £1,200, the total cost of the boiler and installation can cost anywhere between £1,900 and £1,950.

The Easicom is one of the most competitively priced branded combis on the market at this efficiency level. Our prices include a standard horizontal side-wall flue.

If you are comparing options, the Easicom 3 is one of the more budget-friendly choices in our full Glow-worm boiler prices guide.

Using a mid-range installation figure of approximately £1,200:

Glow-worm Easicom3 Combi Costs
Output size	Unit cost (incl. flue)	Total (incl. installation)
24kW	£700	£1,900
28kW	£800	£2,000

Warranty and support

The Easicom’s 5-year standard warranty is activated by Club Energy registration within 30 days of installation. Annual servicing by a Gas Safe registered engineer is required to maintain coverage. 

The aluminium heat exchanger carries a separate 5-year component guarantee when registered.

The 5-year baseline is shorter than the 7-year standard on the Baxi Duo-tec Compact and the 7-year standard on the Worcester Bosch CDi Compact. That two-year gap is the most significant trade-off for the lower purchase price, particularly relevant for homeowners planning to own the property for ten or more years.

Installation information

A standard like-for-like combi swap typically costs around £1,200 and can be completed in a day. The Easicom’s uncomplicated platform is familiar to most Gas Safe engineers, and Glow-worm’s position within the Vaillant Group means parts availability is strong nationally.

What to expect on installation day

Do you need a system flush or filter?

Under UK Building Regulations, fitting a magnetic filter is mandatory when installing a new boiler. A magnetic filter captures metallic debris and sludge before it can reach the boiler’s internal components. Fitting a Glow-worm Power Filter at installation satisfies this requirement.

A powerflush is a separate process that cleans existing pipework and radiators of “sludge” before the new boiler is connected. It is not mandatory, but is strongly recommended on systems over ten years old.

Budget £350-£800 for a powerflush and around £80-£120 for the Power Filter.

Finding a Gas Safe registered engineer

All gas boiler installations must be carried out by a Gas Safe registered engineer. 

Use the WhatPrice quote service to be matched with vetted, Gas Safe registered installers in your area.

Reviews and ratings

Glow-worm holds a 4.4 out of 5 rating on Trustpilot UK, based on over 7,000 reviews. 

Which? gives Glow-worm a three-star customer score in its 2025 survey of over 10,000 boiler owners – lower than Vaillant and Worcester Bosch, but on a par with Viessmann. 

Easicom-specific reviews on Trustpilot are limited in number, making it difficult to draw firm model-level conclusions; the broader Glow-worm feedback covers service and reliability across the full range. 

Positive reviews

Owners who have had the Easicom installed recently report quick heat-up times and quiet operation, with the straightforward analogue clock and LCD display drawing specific mention from homeowners who wanted simple programming without a separate thermostat purchase. 

General Glow-worm service reviews are consistently positive: engineers are described as prompt and knowledgeable, with several reviewers noting same-visit fault resolution.

Landlords cite the competitive unit price and the Vaillant Group parts infrastructure as practical advantages – local Gas Safe engineers know the platform and component turnaround times are generally short.

Negative reviews

An Easicom-specific review in the Trustpilot pool describes six breakdowns in roughly three years on a boiler purchased in 2019, with the owner expressing doubt the unit would reach the end of its 5-year guarantee. This is a single account and cannot be generalised, but it sits alongside broader Glow-worm reliability data from Which?: in its 2025 survey, where Glow-worm placed below the category leaders on fault frequency, with reliability identified as the main drag on its overall score.

The 5-year warranty and the absence of LPG compatibility are the recurring specification criticisms. The 740mm height is worth raising at survey stage as a pre-purchase check, even though it does not appear as a common complaint in the Easicom review pool specifically.

How the Glow-worm Easicom3 Combi compares

Glow-worm Easicom3 Combi Comparison Table
Model	Alpha Evoke NX combi	Baxi 400 Combi 2.1 combi	Glow-worm Easicom3 combi
Typical unit price	£800	£800	£700
Heat exchanger	Stainless steel	Stainless steel	Aluminum
Standard warranty	7 years	5 years	5 years
Max warranty	7 years	5 years	5 years
Built-in WiFi	No	No	No
App control	Alpha Connect (via OpenTherm)	Baxi uSense (sold separately)	MiGo (via gateway, sold separately)
Cupboard fit	Yes	Yes	Yes
Max output/bathrooms	33kW 1-2 bathrooms	36kW 2 bathrooms	28kW 1 bathroom

For personalised guidance on choosing the right boiler, we recommend speaking with a Gas Safe registered engineer.

Final thoughts – is the Glow-worm Easicom3 combi right for you?

With an average price of £700, the Easicom is the cheapest of the three in the comparison table – £100 less than both the Alpha Evoke NX and the Baxi 400 Combi 2.1. That price gap comes with real trade-offs: the Easicom tops out at 28kW with a flow rate suited to a single bathroom, while the Baxi 400 reaches 36kW and the Alpha Evoke NX 33kW, both comfortably covering two-bathroom properties.

The heat exchanger is the other meaningful difference. Both the Alpha Evoke NX and the Baxi 400 Combi 2.1 use stainless steel exchangers; the Easicom uses aluminium. In hard water areas stainless steel has a long-term scaling advantage, though a magnetic filter mitigates much of the risk on either material. 

The Alpha Evoke NX also carries a 7-year warranty compared to 5 years on the Easicom and Baxi 400, which is a meaningful difference on a boiler a homeowner may own for a decade or more.

For a flat, small terrace, or two-bedroom home with a single bathroom and a mains gas supply where upfront cost is the primary concern, the Easicom’s price is difficult to argue with. For properties with two bathrooms, harder water, or a longer expected ownership period, the Alpha Evoke NX at £100 more is worth serious consideration.

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