The Vaillant ecoTEC pro 28kW Combi Boiler is a compact, efficient combination boiler designed to provide reliable central heating and domestic hot water from a single appliance. Supplied with a Vaillant horizontal flue, this package is a convenient option for suitable replacement or new boiler installations.

With an A-rated ErP efficiency rating, stainless-steel heat exchanger and an integrated 8-litre expansion vessel, the ecoTEC pro 28 is designed for dependable everyday performance. Vaillant specifies a domestic hot water flow rate of 11.1 litres per minute at ΔT 35K and a maximum horizontal flue length of 12 metres for 60/100 flue, subject to the manufacturer’s installation requirements and any reductions for bends.