ecoFIT sustain 25, 30 and 35kW

Specification combination boiler range

Designed for specification in new build and social housing
Quiet Mark awarded
High efficiency ErP 'A' rated product
High quality lightweight aluminium heat exchanger with excellent power to weight ratio
Modulating high torque pump uses low energy

Overview

Combination boiler range

The ecoFIT sustain range of combination boilers offers an excellent size-to-output ratio, giving great comfort whilst ensuring a small footprint. Use of sustainable materials also means the boiler is 100% recyclable. The range features 25, 30 and 35kW models to suit all types of properties.

Key features and benefits

Cupboard fit - Compact size (702mm x 390mm x 295mm) offers flexibility of siting including the option to cupboard-fit
Choice of rear or top flue - For flexible siting options in a wide variety of properties
High SAP performance - Helps reduce new build cost by up to 4% on TER. 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 1:4 - Ensuring low energy consumption and maximum efficiency
Clear bright LCD display - Easy to read boiler wherever it is sited
Best in class flue length (up to 10m) - Allows maximum flexibility for location of the boiler
Controls compatability - 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 tenant heating bills

Specifications

Technical data	Unit of measure	ecoFIT sustain 825	ecoFIT sustain 830	ecoFIT sustain 835
General
Boiler type		combi	combi	combi
Signature model output		25kW	30kW	35kW
Article number		0010020392	0010020393	0010020394
Gas Council number		47-044-71	47-044-72	47-044-73
Boiler dimensions (HxWxD)	mm	700 x 390 x 295	700 x 390 x 295	700 x 390 x 295
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
Maximum flow temperature	˚C	80	80	80
Flow temperature range	˚C	10 - 80	10 - 80	10 - 80
Flow temperature factory setting	˚C	75	75	75
Approximate condensate volume at 50/30˚C	litres/hr	1.84	1.84	1.84
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
Lowest water pressure for maximum flow rate	bar	1	1	1
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
Expansion vessel size	litres	8	8	8
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		Aluminium	Aluminium	Aluminium
Boiler lift weight	kg	32	33	33
Performance
NOx class		5	5	5
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
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