ecoTEC pro 24, 28 and 30kW

ecoTEC pro combination boiler

  • Removable side panels and push-fit flue system
  • Fully modulating low NOx burner and fan
  • Dedicated models available for LPG
  • ErP rated A
  • 5 year warranty available with options up to 10 years when registered through Vaillant Advance


The ecoTEC pro range of combi 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 – (720mmx440mmx335mm) 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
  • 5 year guarantee when installed by a Vaillant Advance partner – For added piece of mind
  • 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
  • Option to purchase extended warranty up to 10 years 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)



Unit ecoTEC pro 24ecoTEC pro 28 ecoTEC pro 30
Article number  00100184940010018495
0010018496 (LPG)
Gas inlet connectionmm151515
Connections heating flow and returnmm222222
Connector expansion relief valve (minimum)mm151515
Flue size (concentric) mm60/10060/10060/100
Condensate drain
(minimum internal diametre drain)
Inlet gas working pressure (G20, natural gas)mbar202020
Inlet gas working pressure
(G31, propane)
Gas flow rate at 15°C
and 1013 mbar (based on
hot water generation, if
applicable), G20
Gas flow rate at 15 °C
and 1013 mbar
(based on
hot water generation, if
applicable), G31


Approved flue type  C13, C33,
C43, C53
C13, C33,
C43, C53
C13, C33,
C43, C53

NOx class
SEDBUK SAP seasonal efficiency 2009%89.389.389.3
ErP rating Central Heating AAA
ErP rating Hot Water AAA
Boiler dimensions (WxHxD)mmW=440 H=720 D=338W=440 H=720 D=338W=440 H720 D=338
Weight (boiler only)kg383839
Nominal heat output
range of central heating at 50°C flow/30°C return
kW5.7 -19.95.7-19.9
6.9-25.7 (LPG)
Nominal heat output
range of central heating at 80°C flow/60°C return
kW5.2 - 18.9 5.2 - 18.9 8.0 - 24.7
Maximum DHW outputkW23.427.230
Maximum DHW input
Maximum central heating inputkW19.119.1
18.8 (LPG)
Minimum central heating outputkW5.55.5
7.7 (LPG)
Maximum flow temperature°C858585
Adjustable flow temperature (default setting: 75°C)
30 - 8030 - 8030 - 80
Maximum CH system pressurebar333
Mains water pressure required for maximum flow ratebar0.80.80.8
Expansion vessel capacitylitre888
Volume of water circulating (ΔT= 20 K)l/h8138131,049
Approx. Condensation volume at 50°C feed/30°C returnl/h1.91.92.5
Remaining feed head of
pump (at nominal circulation
water volume)
Minimum DHW flow ratel/min222
DHW flow rate at 35°C temperature risel/min9.611.112.3
Maximum domestic cold water pressurebar101010
Minimum operational water pressurebar0.350.350.35
Hot water discharge temperature range °C35 - 6535 - 6535 - 65
Electrical supply voltageV-/ Hz230/50230/50230/50
Internal fuse (slow) main voltageA222
Minimum electrical power consumptionW353535
Maximum electrical power
Standby electrical power
W< 2 < 2 < 2
Protection class IP X 4DIP X 4DIP X 4D
CE certificate registration


Alternative products

Alternative products

VRC 470f

Wireless weather compensating programmable room thermostat

  • Classed as enhanced load compensator adding 3% to the SEDBUK efficiency rating
  • Automatic summer/winter time change over
  • Includes a service reminder function
  • Cylinder boost function
  • Holiday function


Passive flue gas heat recovery device

  • A simple and cost effective product to provide improved efficiency
  • Easy to install
  • Helps to meet the requirements of higher levels of the code for sustainable homes
  • Improves the efficiency of hot water production
  • Can easily be linked to weather compensation control technology

timeSWITCH 150


  • 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