The smarter way to replace your boiler

  • Get FREE Quotes today
  • Compare quotes & save money
  • Over 5,000 engineers across the UK
Tell us about your job
Get Free Quotes

Vaillant ecoTec Plus Open Vent

The Vaillant ecoTec Plus Open Vent heat only boiler is part of their most compact range of boilers and is perfect for use with an open vented heating system. It is available in four central heating outputs; 15, 18, 28 and 38KW, and prices start from around £650 excluding VAT and fitting costs.

Although the ecoTec Plus Open Vent is compact, it is still powerful enough to provide ample heating and hot water to larger properties. It has a high efficiency rating of SEDBUK A; making it incredibly economical to run, and it has the approval of the Energy Savings Trust.

Other features include an easy to use built-in diagnostics and status display, a fully modulating NOx burner and fan that are kinder to the planet and a 5 year manufacturer’s warranty for added peace of mind.

Vaillant ecoTEC Plus Open Vent Overview


ModelTypeDimensionsMaximum Flow RateOutputEfficiency RatingTypical Price
ecoTEC Plus 415Heat OnlyH – 720 mm
W – 375 mm
D – 340 mm
N/A15 kWB 86% – 90%£796.36
ecoTEC Plus 418Heat OnlyH – 720 mm
W – 375 mm
D – 340 mm
N/A18 kWB 86% – 90%£871.84
ecoTEC Plus 428Heat OnlyH – 720 mm
W – 375 mm
D – 340 mm
N/A28 kWB 86% – 90%£982.96
ecoTEC Plus 438Heat OnlyH – 720 mm
W – 375 mm
D – 340 mm
N/A38 kWB 86% – 90%£1430.27
Key Features & Benefits
SEDBUK Band A compliant with building regulationsHigh Energy Efficiency
Fully Modulating NOx Burner and FanEconomical to run
Stainless Steel Heat ExchangerState of the art
Fully automated Gas and Air modulationGreat emission control
Compact DimensionsEasy to fit, space saving
Approved by Energy Savings TrustHigh Energy Efficiency
Standard 5 year WarrantyPeace of Mind
2 Stage Frost ProtectionAdded protection

What We Think of the Valliant ecoTEC Plus Open Vent

The term Open Vent refers to the fact that these two boilers in this range are heat only. They are traditional boilers which require the added components within the heating system of a cold water cistern and expansion tank. In this they differ from a Combi boiler, which heats the hot water on demand.

An open vent system sends hot water to a storage tank, and from there to the taps, and to the radiators. The four power ratings in the range – 15kW, 18kW, 28kW and 39kW – make them ideal for a wide range of properties, from a small flat to a medium sized house. They can run on either natural gas, or LPG.

As for its weight – it tips the scales at 31kg – it is similar to many others of this size and needs to be wall-mounted. The control panel offers a number of functions for the user and you can also ask for an optional timer to be built in.

Getting a Competitive Boiler Quote

Before you buy a new boiler, we advise you look around for the best deals first; get a quote from a national boiler installer and compare it with one from a local boiler installer.

Once you have chosen your boiler it is vital that it is fitted by only a Gas Safe Registered engineer. This will ensure the work is carried safely and properly.

Get Vaillant Boiler Quotes

Get quotes to supply a new Vaillant boiler now

2 reviews for Vaillant ecoTec Plus Open Vent

What Customers Are Saying

Rated 3.0 out of 5
14 March 2015

No Title

I’m trying to dcdeie whether to start heating my hot water with oil. I have an oil fired furnace but a propane water heater. I just went through 60 lbs of propane in two weeks which equates to about $30 per week for laundy; showers and dishes. My old place the furnace heated the hot water in the furnace and during the summer I would fill the furnace in say april and not need fuel until oct. Seems lots cheaper than what the propane is costing me. Please comment.

Rated 3.0 out of 5
28 July 2014

No Title

Brilliant exotic plus 824HE

barry hawksworth