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Vaillant ecoFit Pure 825 Combi Boiler Only 0010030389

Item Code: 0010030389


Quick Overview

Ultra-quiet operation (Quiet Mark-approved), small footprint and total flexibility of siting (with top and rear flue options) mean that the Vaillant ecoFIT Pure range fits in with your needs.The automatic purging assistance and high spec, aluminium heat exchanger makes for a lightweight installation.High quality and high efficiency, together with the complete availability of spare parts and the easy accessibility of the unit layout mean the Vaillant ecoFIT Pure is easy to maintain too.


  • Top and rear flue options on all boiler models. Allows flexible siting options and installs in various property types. 
  • Wide product range. Complete range of outputs, making the ecoFIT pure a suitable boiler for most situations.
  • Compact, cupboard fit solution. Small boiler footprint, offering fl exibility of siting, including a cupboard-fit.
  • Clear LED display. Offers visibility in dimly lit areas for easier installation and use.
  • Easy installation and maintenance. Accessible layout that allows all components to be replaced from the boiler front. Additional space is possible with removable side panels. 
  • Recognisable Vaillant fault codes. Making it easy to diagnose faults.
  • High-specifi cation aluminium heat exchanger. Designed to last longer, maintain easily, and reduce energy bills.
  • High-quality components. Offering peace of mind for the lifetime of the product.
  • Industry-leading flue lengths. 10m flue length across all ecoFIT pure boiler outputs.
  • 4-sided cooling and water agitation of the heat exchanger. Reducing stress on the heat exchanger for longer life reliability and reduced maintenance costs. 
  • Compatible with Vaillant’s intelligent range of controls. For the most convenient and energy efficient system, saving on energy bills.
  • 5 year warranty*. With the opportunity to purchase up to 10 years. For homeowner piece of mind. (Subject to Manufacturers T&C's)

Find a Vaillant Advance installer.


Barcode 4024074778791
Technical Details
Technical data 25kW combi 30kW combi 35kW combi
Article Number 0010020389 0010020390 0010020391
Boiler dimensions (HxWxD) (mm) 700 x 390 x 295 700 x 390 x 295 700 x 390 x 295
Rear flue option Yes Yes Yes
Boiler lift weight (kg) 32 33 33
Nominal heat output range at 50/30˚C (kW) 5.3 - 19.1 6.3 - 26.5 7.5 -26.7
Nominal heat output range at 80/60˚C (kW) 5.0 - 18.2 6.0 - 25.2 7.1 - 25.5
Maximum flow temperature (˚C) 80 80 80
Flow temperature range (˚C) 10-80 10-80 10-80
Domestic hot water flow rate l/hr (at DT = 35K) 10.4 12.4 14.4
Flow temperature factory setting (˚C) 75 75 75
Approximate condensate volume at 50/30˚C (l/hr) 1.84 2.55 2.57
Maximum horizontal flue length 60/100 (m) 10 10 10
PCDB seasonal efficiency (%) 89 89 89.4
ErP rating (heating/hot water) A/A A/A A/A
Boiler Type Combination
Output 25kw / 85303btu


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This product appears in the following categories:  Vaillant Boilers & Accessories

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