ecoFIT sustain 25, 30 and 35kW

Specification combination boiler range

Exclusively designed with specifiers in mind
Compact cupboard fit with rear flue option
High efficiency ErP 'A' rated product with strong SAP ratings
Compatible with the full range of Vaillant controls and accessories
High quality lightweight aluminium heat exchanger with excellent power to weight ratio

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Overview

Combination boiler range

The ecoFIT sustain range of combination boilers offers an excellent size-to-output ratio, providing great comfort whilst ensuring a small footprint. The range features 25, 30 and 35kW models to suit all types of homeowner and tenant properties.

Features & benefits

Compact, cupboard fit solution – A smaller boiler footprint (700mm x 390mm x 295mm) means the ecoFIT sustain offers siting flexibility, including cupboard fit
Top and rear flue options - For flexible siting options in a wide variety of properties
High SAP performance - Helps reduce new build cost. Highly efficient and economical to run up to an 89.3% efficiency rating (SAP 2009)
High-quality lightweight aluminium heat exchanger - Lightweight, compact design offers long life with an excellent power-to-weight ratio makes installs/maintenance easier
Patented 4 sided cooling - Reduces stress on all components to minimise the cost of maintenance over the life of the product
Familiar Vaillant diagnostics - Offers quick and easy maintenance for your maintenance team
Patented condensate trap - Easy install with a safety back-up
Fully modulating low NOx burner and fan - For improved energy efficiency
Recognised Grundfos high-efficiency pump - Modulating high-torque pump uses low energy to deliver a balanced output to meet the boiler demand helping to reduce energy consumption
Built-in two-stage frost protection - To ensure optimal performance all year round
Warm start function - Provides tenants with instant hot water
Modulation range up to a 1:5 - Ensuring low energy consumption and maximum efficiency
Clear bright LCD display - Easy to read boiler wherever it is sited
Up to 10m flue lengths - Allows maximum flexibility for location of the boiler
Controls compatibility - The wide range of Vaillant room thermostats, wired & wireless controls including the vSMART™ app-based controls with weather compensation to lower running costs for tenants
Quiet Mark accredited - Thanks to being ultra-quiet whilst in operation
ErP 'A' Rated product - Suitable for both refurbishment and new build with lower running cost to reduce heating bills

Specifications

Technical data	Unit of measure	ecoFIT sustain 825	ecoFIT sustain 830	ecoFIT sustain 835
General
Boiler type		Combi	Combi	Combi
LPG Convertible		No	No	No
Article number		0010020392	0010020393	0010020394
PCDB Number		017958	017959	017960
Dimensions
Boiler dimensions (HxWxD)	mm	700 x 390 x 295	700 x 390 x 295	700 x 390 x 295
Side Clearance	mm	5	5	5
Top Clearance	mm	205	205	205
Top clearance if using rear flue	mm	20	20	20
Bottom Clearance	mm	150	150	150
Front Clearance *	mm	600	600	600
Can be reduced to 5mm if fitted behind a removable door/panel
Heating
Nominal heat output range at 50/30˚C (Condensing mode)	kW	5.3 - 19.1	6.3 - 19.1	7.5 - 19.1
Nominal heat output range at 80/60˚C (Non condensing mode)	kW	5.1 - 18.3	6.1 - 18,3	7.2 - 18.3
Flow temperature range	˚C	10 - 80	10 - 80	10 - 80
Modulation (max/min)	1 : X	1:5	1:5	1:5

Domestic Hot Water
Maximum heat output for water generation	kW	25.7	30.6	35.7
Lowest water pressure to operate boiler	bar	0.3	0.3	0.3
Lowest water flow for operation	l / min	1.9	1.9	1.9
Domestic hot water flow rate (at DT = Δ35K)	l / min	10.4	12.2	14.1
Hot water output temperature range	˚C	35 - 60	35 - 60	35 - 60
Mechanical
Gas inlet connection (pipe size)	mm	15	15	15
Heating flow and return connections (pipe size)	mm	22	22	22
Hot and cold water connections (pipe size)	mm	15	15	15
Heat exchanger material	Stainless/ Aluminium	Aluminium	Aluminium	Aluminium
Filling loop supplied	Yes/no	No	No	No
Boiler lift weight (Dry boiler)	kg	32	33	33
Spacer frame available	Yes/no	Yes	Yes	Yes

Performance
NOx (En 15502-2-1)	mg/kWh	38.9	38.3	37.2
ErP efficiency	%	93	93	93
ErP decibel rating (sound power)	dBa	49	44	45
PCDB seasonal efficiency (SAP2009/2012)	%	89.3	89.3	89.3

Fluing options
Maximum horizontal flue length 60/100	m	10	10	10
Maximum vertical flue length 60/100	m	10	10	10
Maximum horizontal flue length 80/125	m	25	25	25
Maximum vertical flue length 80/125	m	25	25	25
Rear flue options	Yes/no	Yes	Yes	Yes
Permissible flue classifications		C13, C33, C43, C53	C13, C33, C43, C53	C13, C33, C43, C53