ecoTEC plus 825, 832, 835, 838 and 938

ecoTEC plus combination boilers

Step by step full text installation wizard
Dedicated models available for LPG
ErP 'A' rated
Hand-built in our award-winning Derbyshire manufacturing plant
Guarantee up to 10 years available when you book a Vaillant Advance installer*

Overview

The ecoTEC plus range of high efficiency boilers combine fantastic efficiency levels and high performance with great usability. Thanks to continuous modulation and real combustion control by a multi-sensor system, they achieve high efficiency at the lowest emissions.

*5 years out of the box guarantee. 10 year free extended Advance guarantee available when fitted with a boiler protection kit, excludes 48 and 64kW light commercial boilers

General information

The ecoTEC plus is available in a range of power outputs to meet the heating requirements of varying house sizes. Each one is ultraquiet, a feature recognised by the Noise Abatement Society, which has awarded many of the ecoTEC plus range the Quiet Mark for

its innovative design, specifically created to ensure a peaceful home for your customers.

At Vaillant we are working towards low carbon solutions today. As part of the HyDeploy project, Vaillant boilers have been tested with up to 20% hydrogen blended with Natural Gas, and we are currently undergoing many tests to each of our boilers to validate their compatibility with up to 20% hydrogen.

Features & benefits

Available in 25, 32, 35 and 38kW outputs
Highly efficient and economical to run – With up to an 89.4% efficiency rating (SAP 2009)
Instant hot water delivery in just 5 seconds - Meaning no need for storage tank or cylinder
Wide modulation range of up to 1:6 – Ensuring low energy consumption and maximum efficiency
Flame lift detection system – Enabling more efficient and quieter combustion
Dedicated models available for LPG – Giving a solution for off-gas areas
Stylish contoured case design with down flap – Making this a boiler that fits with the décor of any home
Built-in-two-stage frost protection – Ensuring optimal performance all year round
An innovative solution for large homes – With a higher hot water demand, without needing to install a cylinder or hot water tank (ecoTEC plus 938 only)
Extended guarantees available when installed by a Vaillant Advance partner – For total peace of mind
Quiet Mark accreditation – Thanks to being ultra quiet whilst in operation
Step by step wizard – For quicker ‘first time right’ set up and installation
Compatible with aroTHERM air to water heat pump hybrid system – Making the perfect entry into renewable systems
Free 5 year out the box guarantee. Upgrade to 10 year free extended guarantee when registered with Vaillant Advance with a boiler protection kit (excludes 48 and 64kW light commercial boilers).

Download your ErP label here

Useful videos

Specifications

Technical data	Unit	ecoTEC plus 825	ecoTEC plus 832	ecoTEC plus 832 LPG	ecoTEC plus 835	ecoTEC plus 838	ecoTEC plus 938
Boiler type		combi	combi	combi	combi	combi	combi
Signature model output		25kW	32kW	32kW	35kW	38kW	38kW
Article number		00100218323	0010021824	0010021825	0010021822	0010021826	0010021827
Gas Council number		47-044-83	47-044-84	47-044-85	47-044-82	47-044-86	47-044-87
Boiler dimensions (HxWxD)	mm	720 x 440 x 338	720 x 440 x 338	720 x 440 x 338	720 x 440 x 372	720 x 440 x 406	720 x 440 x 600
Heating
Nominal heat output range at 50/30˚C (Condensing mode)	kW	4.2 - 20.4	5.7 - 25.7	6.7 - 25.7	6.4 - 32.2	7.1 - 30.1	7.1 - 30.9
Nominal heat output range at 80/60˚C (Non condensing mode)	kW	3.8 - 19.3	5.2 - 24.4	6 - 24.4	5.8 - 30.4	6.5 - 28.6	6.5 - 28.6
Maximum flow temperature	˚C	85	85	85	85	85	85
Flow temperature range	˚C	30 - 85	30 - 85	30 - 85	30 - 85	30 - 85	30 - 85
Flow temperature factory setting	˚C	75	75	75	75	75	75
Approximate condensate volume at 50/30˚C	litres/hr	2	2.5	2.5	3.1	2.9	2.9
Modulation (max/min)	1 : X	1:6.7	1:6.1	1:5.3	1:6	1:6	1:6
Domestic Hot Water
Maximum heat output for water generation	kW	25.4	31.8	31.8	35	38.7	38.7
Lowest water pressure to operate boiler	bar	0.35	0.35	0.35	0.35	0.35	0.35
Lowest water flow for operation	l/min	2.0	2.0	2.0	2.0	2.0	2.0
Lowest water pressure for maximum flow rate	bar	0.8	0.8	0.8	0.8	0.8	0.8
Domestic hot water flow rate (at DT = Δ35K) *	l/min	10.5	13	13	14.3	15.9	15.9
Hot water output temperature range	˚C	35 - 65	35 - 65	35 - 65	35 - 65	35 - 65	35 - 65
Mechanical
Expansion vessel size	litres	10	10	10	10	10	10
Gas inlet connection (pipe size)	mm	15	15	15	15	15	15
Heating flow and return connections (pipe size)	mm	22	22	22	22	22	22
Hot and cold water connections (pipe size)	mm	15	15	15	15	15	15
Heat exchanger material	Stainless/Aluminium	Stainless steel	Stainless steel	Stainless steel	Stainless steel	Stainless steel	Stainless steel
Boiler lift weight (Dry boiler)	kg	36	37	37	38	43	60 (43+17)
Performance
NOx class		5	5	5	5	5	5
NOx (En 15502-2-1)	mg/kWh	32	35	55	29	34	34
ErP efficiency	%	94	94	94	94	94	94
ErP decibel rating (sound power)	dBa	47	47	47	46	45	45
Fluing options
Maximum horizontal flue length 60/100	m	12	5.5	5.5	5.5	5.5	5.5
Maximum vertical flue length 60/100	m	16	8	-	8	8	8
Maximum horizontal flue length 80/125	m	39	32	-	32	32	32
Maximum vertical flue length 80/125	m	41	34	-	34	34	34