grossbritannien en Products Heating systems Oil-fired heating systems Weishaupt Thermo Condens oil-fired condensing boiler (WTC-OW, 6 to 15 kW)

Weishaupt Thermo Condens oil-fired condensing boiler (WTC-OW, 6 to 15 kW)

The innovative codensing boiler for economical domestic heating.


The flame of the modulating premix oil burner The corrosion-resistant aluminium/silicon heat exchanger Typical installation with a Weishaupt Aqua Tower (WAT) cylinder The wall-hung unit takes up little space

Weishaupt oil-fired condensing boilers use almost all of the energy stored in the fuel, converting it efficiently into heat. A condensing boiler uses the energy which in older heating systems is lost to atmosphere with the flue gases. In so doing, nett efficiency is increased to 105 % compared to 95 % for low-temperature systems.

Due to their extremely efficient utilisation of energy, condensing boilers have a higher nett efficiency than low-temperature systems.

Innovative combustion technology: The WTC-OW oil-fired condensing boilers are particularly notable for their high efficiency and their quiet operation. These two factors are due in no small part to the newly developed, modulating  premix oil burner. The energy used is converted into useable heat alsmost without a flame, which greatly reduces flue gas temperatures and minimises emissions.The boiler benefits from modulating operation, having an infinitely variable response to current heat demand between 6 and 15 kW.

Particularly quiet: Just like a gas-fired condensing boiler, the boiler is almost completely silent thanks to its modulating operation and innovative preparation of the fuel/air mixture. 

The master saver: The boiler's modulating response to current heat demand makes it very economical. The Class-A efficiency circulating pump fitted as standard also contributes to the boiler's economical operation.


Easy to operate: The WTC-OW is set and controlled using a portable controller, either directly at the boiler or from elsewhere in the building. Remote operation and maintenance (e.g. via the internet) can be achieved using the optional Weishaupt WCM-COM communications module.

Space saver: The oil-fired boiler is of a space-svaing wall-hung design. A compact version with an integral DHW cylinder is also available and has a very small installation footprint.

Environmentally friendly fuel: The WTC-OW is designed for use with low-sulphur gas oil (DIN 51603-1). Neutralisation of the flue-gas condensate is not necessary.

Long service life: The aluminium/silicon heat exchanger is corrosion-resistant and has excellent heat transfer properties, contributing greatly to the energy-efficient operation of the boiler.

Solar connection: The boiler can be used in conjunction with Weishaupt solar collectors, making it even more environmentally friendly and economical.

Operating instructions

WCM-FS 2.0 manual
WCM-FS 2.0 manual
PDF • 750.4 KB

DHW cylinders

Weishaupt Aqua Standard: WAS 150 - 500

This DHW cylinder is available in five sizes, so that precisely the right capacity can be selected for any application. The generously dimensioned heating coil enables rapid heating, and the cylinder's PU-foam insulation keeps the temperature level constant for long periods, saving energy.

WAS 200

Weishaupt Aqua Tower: WAT 140

The slim Weishaupt Aqua Tower can help when boiler room space is limited. Its 140-litre volume and high-capacity heat exchanger make it perfectly adequate for two to four-person households. Nor should the design aspect be overlooked - the Aqua Tower is an elegant solution with any Weishaupt boiler or heating system.

WAT 140

Weishaupt thermal store: WES-A 660/910, version C

Weishaupt thermal stores organise and distribute the heat produced by different energy sources (gas or oil-fired condensing boilers, heat pumps, solar collectors, solid-fuel boilers, or stoves) with an exemplary degree of efficiency. Inlet dampers ensure that the ideal temperature stratification is always maintained within the thermal store. Energy is also drawn off in an economical manner, with solar energy having priority over any other source.

WES 660 A-C

Weishaupt Aqua Sol: WASol 310 - 510

A bivalent cylinder for solar DHW heating. Bivalent means that there are two heating coils within the cylinder; the lower coil is connected to the solar circuit, the upper to the heating system. If the energy provided by the solar circuit is not sufficient for heating the water in the cylinder, the heating system is switched on automatically. Three large gradations allow precise dimensioning for optimal heating convenience with minimal energy consumption.

WASol 310 410

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