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A white Vaillant ecoTEC Plus 635 37kW system gas boiler is pictured on a green-yellow gradient background. Text reads: "Fully Fitted," "£0 Deposit," and the product name at the bottom.

Vaillant ecoTEC Plus 635 37kW System Gas Boiler

£3,500.00

High-output system boiler for very large homes, with premium efficiency and advanced technology.

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The Vaillant ecoTEC Plus 635 37kW System Gas Boiler is a premium condensing system boiler for very large homes with up to 20 radiators and multiple bathrooms, paired with a hot water cylinder. It provides a 37kW central heating output and a 94% seasonal efficiency rating (ErP A-rated). Measuring 720x440x406mm and weighing 38kg, it’s slightly larger but still suitable for wall-mounted installation. It includes ioniDETECT technology, a stainless steel heat exchanger, a two-stage frost protection system, and pressure/flow sensors for precise monitoring. Quiet Mark certified, it supports myVAILLANT app control via myVAILLANT connect and hybrid systems like aroTHERM. It supports natural gas or LPG and offers a 5-year warranty, extendable to 7-10 years with a Vaillant Advance installer. Ideal for expansive properties with significant heating and hot water demands.

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