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ecoTEC pro 24, 28 and 30kW

Combination boiler range

  • Removable side panels and push-fit flue system
  • Fully modulating low NOx burner and fan
  • ErP 'A' rated
  • Standard 2 year warranty, can be upgraded to a free 7 year warranty when registered through Vaillant Advance.


The ecoTEC pro range of combination boilers combine the built-in quality, reliability and performance you’d expect from Vaillant, with a simple design and approach.

The range features 24, 28 and 30kW models, making this boiler perfect for homes with a smaller heating and hot water requirements.

Features and benefits:

  • Compact dimensions – (720mm x 440mm x 335mm) For flexible siting options
  • Removable side panels and push-fit flue system – For improved accessibility, ease of installation and greater installation flexibility
  • Highly efficient and economical to run – With up to an 89.3% efficiency rating (SAP 2009)
  • Quiet Mark accreditation and Which? Best Buy accredited
  • Fully modulating low NOx burner and fan – For improved energy efficiency
  • Built-in two-stage frost protection – To ensure optimal performance all year round
  • Increased speed of hot water delivery – Thanks to Vaillant’s ‘aquaCOMFORT’ warm start feature
  • Total system solution available from one manufacturer – Intelligent controls and accessories available
  • Dedicated models available for LPG – Giving a solution for off-gas areas
  • Wide modulation range of up to 1:4 – Ensuring low energy consumption and maximum efficiency
  • Compatible with aroTHERM air-to-water heat pump hybrid system – Making the perfect entry into renewable systems
  • Standard 2 year warranty, can be upgraded to a free 5 year warranty when registered through Vaillant Advance

Download your ErP label here

ecoTEC pro 24 ErP label (81 kB)

ecoTEC pro 28 ErP label (84 kB)

ecoTEC pro 28 LPG ErP label (82 kB)

ecoTEC pro 30 ErP label (83 kB)



Technical dataUnit of measure ecoTEC pro 24ecoTEC pro 28ecoTEC pro 28 LPGecoTEC pro 30
Boiler type combicombicombicombi
Article number  0010021836001002183700100218380010016538
Gas Council number 47-044-8847-044-8947-044-9047-044-52
Boiler dimensions (HxWxD)mm720 x 440 x 338720 x 440 x 338720 x 440 x 338720 x 440 x 338
Nominal heat output range at 50/30˚C (Condensing mode)kW
5.9 - 24.8

6.9 - 25.9

9 - 25.3

9 - 25.7
Nominal heat output range at 80/60˚C (Non condensing mode)kW
5.4 - 23.5

5.4 - 24.1

7.5 - 24

6.2 - 24.4
Maximum flow temperature˚C85858585
Flow temperature range˚C30 - 8530 - 8530 - 8530 - 85
Flow temperature factory setting˚C75757575
Approximate condensate volume at 50/30˚Clitres/hr1.91.91.92:5
Modulation (max/min)1 : X1:4.31:51:3.61:3.8
Domestic Hot Water
Maximum heat output for water generationkW23.427.227.230
Lowest water pressure to operate boilerbar0.
Lowest water flow for operationl/min2.
Lowest water pressure for maximum flow ratebar0.
Domestic hot water flow rate (at DT = Δ35K) *l/min9.611.111.112.3
Hot water output temperature range˚C35 - 6535 - 6535 - 6535 - 65
Expansion vessel sizelites8888
Gas inlet connection (pipe size)mm15151515
Heating flow and return connections (pipe size)mm22222222
Hot and cold water connections (pipe size)mm15151515
Heat exchanger materialStainless/AluminiumStainless SteelStainless SteelStainless SteelStainless Steel
Boiler lift weight (Dry boiler)kg38383839
NOx 5555
Nox (En 15502-2-1)mg/kWh27272830
ErP efficiency%94949493
ErP decibel rating (sound power)dBa49494949
Fluing options
Maximum horizontal flue length 60/100m12121212
Maximum vertical flue length 60/100m16161616
Maximum horizontal flue length 80/125m39393939
Maximum vertical flue length 80/125m41414141

*flow restrictor fitted to achieve a Δ42K rise

Related Products

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timeSWITCH 150 Boiler Controls

  • Single channel analogue timer
  • Mounts directly into boiler fascia
  • 24-hour timer for central heating
  • Compatible with all Vaillant combi boilers
  • Compatible with VRT 50 digital room thermostat