ecoTEC Exclusive
Worcster Bosch

ecoTEC exclusive boiler range and prices

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ecoTEC exclusive prices

A Vaillant ecoTEC Exclusive boiler costs from £1,700 to £2,100 (supply only) and fully fitted from £3,200 to £4,500. Prices based on like for like boiler replacement in the same location.


  • Power output is the biggest influence on the boiler unit price of an ecoTEC Exclusive, the least powerful model is £400 cheaper than the top of the range.

Prices per model

ecoTEC exclusive Green iQ Fuel Output Average Boiler Only Price Average Price with installation Quote
835 Combi Gas & LPG 35kW £1,800 £3,300 Free Quote
843 Combi Gas & LPG 43kW £2,100 £3,600 Free Quote
627 System Gas & LPG 27kW £1,700 £3,200 Free Quote

ecoTEC exclusive boiler range

The ecoTEC Exclusive is the flagship boiler model from Vaillant and is available as a combi and a system boiler for larger homes..


  • It was the first boiler range to have Vaillant's Green IQ technology which cleverly optimises boiler performance to help maximise efficiency and reduce your gas bill.


  • The boiler can adapt to heating demands through modulation (1:10) and reduce the power output when demand form the household is low to keep gas usage down, saving money.


  • It has a clever Extra-Condense heat exchanger to minimise wasted heat and increase efficiency.


  • Comes in-built with remote diagnostics, helping to easily maintain optimum performance.


  • Highly environmentally friendly with 85% of the boiler compatible for recyling at the end of it's life.


  • Available as a 35kW and 43kW combi boiler and as a 27kW system boiler.

Key features

  • Fuel: Gas


  • Boiler type & output (kW):
  • Combi 35kW, 43kW
  • System 27kW


  • Dimensions (mm): 720 h x 440 w x 406-474 d


  • Solar Compatible: No


  • ErP Efficiency rating: A (94% efficiency in central heating)


  • Which? Best Buy Award: no


  • Quiet mark accreditation: 43dB(A) one of the quietest boilers


  • Guarantee: 10 years


  • Flow rate: up to 17.8 litres per minute


  • Market leading modulation: 1:10  modulation


  • Smart Control: myVAILLANT compatible for control via smart phones


  • Green iQ Technology: for high efficiency and lower gas usage


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