deutschland en Products Heating systems Gas-fired condensing boilers Weishaupt Thermo Condens Compact gas-fired condensing boiler (WTC-GW K, 4.5 to 25 kW)

Weishaupt Thermo Condens Compact gas-fired condensing boiler (WTC-GW K, 4.5 to 25 kW)

The svelte boiler with an integrated DHW cylinder.


The shapely Compact unit Portable control unit The Weishaupt Aqua Power (WAP) cylinder The Weishaupt Aqua Integra (WAI) cylinder

The Weishaupt Thermo Condens Compact condensing boiler comes with an integrated DHW cylinder. The boiler is identical to the wall-hung WTC-GW unit; the cylinder is located below.

Install anywhere: Whether in the cellar or elsewhere: the boiler's elegant design suits any surroundings.

Innovative stratified cylinder: The Weishaupt Aqua Power's innovative stratification provides a large degree of DHW convenience.

Economical alternative: The WTC Compact is also available with a tried-and-tested 100-litre DHW cylinder with integral coil heat exchanger, the Weishaupt Aqua Integra.

Excellent energy utilisation: Modulating capacity regulation, O2 trim and an aluminium/silicon heat exchanger: all of these details contributions contribute to energy savings. The maximum utilisation factor is 110 % nett, equivalent to 99.1 % gross. This is at the limit of what can be physically achieved. Additionally, electrical consumption is reduced through the use of an energy-saving pump.

Exemplary emissions: With Weishaupt, low consumption means low emissions. The SCOT technology (O2 trim) fitted to each WTC Compact as standard ensures a contunually high degree of energy utilisation and low emission levels, even when the gas quality fluctuates - for example between the summer and winter months.

Different gas types: The boiler can operate on natural gas, LPG, or biogas of a suitable (natural-gas) quality.

Quiet operation: The fan benefits from variable speed drive, which reduces operational noise to a minimum.

Easy to operate: Weishaupt Thermo Condens boilers are 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.

Transportation and installation: The Thermo Condens Compact is supplied as two sub-assemblies in order to simplify transportation and installation.

Long service life: Weishaupt condensing boilers are the result of years of experience and developmental work. Only high-quality materials and components are used during manufacture.

System technology: Weishaupt has a comprehensive range of accessories, from flue-gas systems to controllers. All from the same place and all perfectly matched to each other.

Energy efficiency

The familiar efficiency labelling of fridges, washing machines and televisions has now been extended to cover heating equipment. Both individual products and complete heating systems will be given energy efficiency labels.

The thinking: The labelling complies with European Union (EU) directives and is designed to give consumers a basis for comparison and thus to help them make informed decisions when buying heating systems. Consistent, standardised practice will be ensured by the predefined methods of calculation that have been laid down by the EU Commission.

Product label: Every boiler will receive what is known as a product label. This will state the energy efficiency for space and, where applicable, water heating. Other figures – such as sound power levels –  might also be given, depending on the heating system.

System label: If a complete system is being installed, e.g. a boiler with a temperature controller and a DHW cylinder, there will be a system label to show the energy efficiency of that system as a whole. This is usually better, as all the components have been matched to one another and expansions to the system, for example with solar collectors, have been taken into account.

Usefulness: The labels show the energy efficiency as defined by certain standards. However, this shouldn’t be the be-all and end-all when it comes to domestic heating. Many factors influence the energy efficiency and consumption of a heating system: How warm should the house be? How much hot water will be used? Is there underfloor heating? Purchasing decisions should therefore not be made solely on the basis of the energy efficiency label.

SystemEnergy efficiency class*
WTC 15-A-K-PEA-I-100 A / A
WTC 15-A-K-PEA-PB-115 A / A
WTC 25-A-K-PEA-I-100 A / A
WTC 25-A-K-PEA-PB-115 A / A

*Per EU Regulation No. 811/2013 seasonal space heating energy efficiency / water heating energy efficiency, load profile XL

Operating instructions

Operating instructions WTC 15-A Version K / WTC 25-A Version K
Operating instructions WTC 15-A Version K / WTC 25-A Version K
PDF • 457.8 KB
Condensing boilers WTC 15-A / 25-A / 32-A
Condensing boilers WTC 15-A / 25-A / 32-A
PDF • 2.1 MB
Remote control station WCM-FS 2.0
Remote control station WCM-FS 2.0
PDF • 750.4 KB

DHW cylinders

Weishaupt Aqua Power: WAP 115

Compact and efficient: The 115-litre cylinder's innovative stratification provides a large degree of DHW convenience, and is more than adequate for a four-person household. (Energy efficiency class: B)


Weishaupt Aqua Integra: WAI 100

The compact, 100-litre Aqua Integra DHW cylinder is an ideal alternative for two to three-person households with very hard water. The integral coil heat exchanger can be easily vented. (Energy efficiency class: B)


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