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ATAG iC Economiser 39 fully installed combi boiler with 10 years warranty


The ATAG iC Economiser 39 is an innovative 42kW combination boiler, with an impressive flow rate of 17.5 l/m @35°C. Designed specifically with larger homes in mind, the built-in Passive Flue Gas Heat Recovery Device (PFGHRD) helps reduce gas consumption, working alongside the inbuilt weather compensator to ensure optimum efficiency.

ATAG One Controller


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Key Features

  • Innovative built-in gas heat recovery technology helps to cut your home’s gas consumption
  • Exceptional energy saving performance is the best in Europe
  • Save in excess of £40 per year on hot water production
  • Sleek, compact design – perfect for properties with limited space
  • Lower cost of ownership – helping cut your heating bills
  • Features the in-built weather compensator – ensuring your boiler adapts to outside weather
  • Fully compatible with ATAG iSol solar range
  • Compatible with the smart ONE controller – taking the hassle out of heating your home
  • A solution to suit all – ATAG’s Economiser range consists of three boilers, Economiser 27, 35 & 39, producing impressive flow rates from 12.6 l/m to 17 l/m @ 35°C
  • 10 years parts and labour warranty
  • **Available in LPG, Please call or Email before ordering as this needs to be set at factory and will cost slightly extra**
  • Life time guarantee on main heat exchanger

Technical Spec

Part Number BE200139
ErP Seasonal space heating energy efficiency class A
ErP Seasonal space heating energy efficiency (%) 94
ErP Water heating energy efficiency class A
ErP Water heating energy efficiency (%) 96
Erp Declared load profile DHW XXL
DHW input kW 42.5
CH output kW (50/30ºC) 31.2
Flow rate @ 35°C rise l/min 17.0
SEDBUK 2009 (%) 89.7
Dimensions (H x W x D) mm 700x440x355
Boiler lift weight with jig Kg 46
Standard guarantee (years) 7
Additional years warranty available from 8 – 10 years 1, 2 or 3
LPG available Yes
Solar compatible Yes
NOx class 5
Ingress Protection (IP) IPX4D
Maximum equivalent horizontal flue length (m) 6
Maximum equivalent vertical flue length (m) 6




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