Heating in residential buildings and houses should be not only energy efficient and effective but also easy to operate and ecological. This is possible with underfloor and wall heating, which have recently become very popular not only among the owners of single-family houses or apartments but also smaller flats and service facilities. Both wall and underfloor heating are examples of surface heating systems, which are not only efficient but also elegant as they do not require the use of radiators to provide heating in interiors.

The offer of the Carline company includes modern underfloor and wall heating systems as well as traditional radiator heating systems.


We implement reliable and efficient heating systems such as wall heating, underfloor heating and radiator-based heating. We offer such innovative solutions as:

Condensing boilers

Condensing boilers can be used in single-family houses and in larger buildings. Special construction of the heat exchanger and the chimney increases efficiency of the device. Heating installation using condensing boilers is powered by gas or fuel oil. Temperature can be regulated by a burner. The system quickly responds to temperature changes in the building and provides continuous heating.

Modern heating installations enable automatic control of temperature without the need of manual adjustments. Such a solution is particularly important in the winter, as temperatures at any time of day or night can be observed and set in accordance to individual requirements.

Heat pumps

Now more than ever it is worth investing in renewable energy sources: a perfect solution are heat pumps with a ground heat exchanger or solar collectors. Underfloor heating based on a ground heat exchanger collects heat from the ground, so the type of soil and the level of groundwater are of great importance.

Another economical and convenient solution are pumps using the air as lower heat source. Pumps are installed outdoors or in utility rooms. The latest models of air-water type pumps obtain 100% of nominal power for central heating even when the temperature outdoors is 15°C.

The biggest savings can be achieved by installing heat pumps with a ground heat exchanger. In this type of system, it is important to examine the type of soil, the level of groundwater as well as the distribution and length of the collector of the ground heat exchanger, as heat is collected from the ground.

Auxiliary devices of the heating system – solar collectors

Solar collectors are increasingly popular and they are very effective in our climate. Their efficiency depends on location and angle of inclination of the roof. The best results can be achieved in the optimal location of the south roof surface. If the angle of inclination is 45°, smaller collectors can be used, thus reducing investment costs.

Flat roofs require the installation of a support frame, so the collectors can be used not only for domestic hot water but also central heating, both in traditional, radiator-based and wall heating. However, they require adjustments of a complex installation and the use of water storage tanks to store heat. For such purposes, we use vacuum collectors, which generate more energy in the winter, even with little sunlight.


Energy efficient hybrid systems, combining the advantages of two or more sources of heat, e.g. of a condensing boiler and heat pumps or solar collectors, are a particularly ecological and efficient solution. Thanks to the built-in automation, the system selects the optimal source of energy, thus providing efficient and economical operation at all times.

A modern heating installation with an in-built air-water heat pump and a condensing gas boiler form a typical hybrid system. In transitional periods, only the heat pump operates at a full capacity and supplied both central heating and the domestic hot water system. If temperature drops, the boiler is activated and operates along with the heat pump. In the case of harsh frosts, the system turns off the pump, and the heating system uses only the boiler. Such a solution ensures efficient heating of the building and a significant reduction of energy consumption throughout the year.

Oil boilers or boilers powered by liquid gas can be successfully supplemented by an air-water heat pump, which will operate in optimal outdoor temperatures, while the boiled will be activated only in very low temperatures as a peak-load source. An optimally selected heating system can reduce the use of the boiler to one month in the heating season, while the remaining heat demand will be covered by the heat pump, which is much more cost efficient.

Another energy efficient hybrid device is a condensing boiler adopter to operate with solar collectors. The boiler is connected to a buffer tank, where the surplus heat generated by solar collectors can be stored. The burner of the boiler is activated only then the solar installation does not cover the current demand for domestic hot water. This economical device is quiet and the auxiliary buffer tank enables to connect additional source of heat, e.g. a fireplace with water jacket.

The solution described above are cost effective and can support traditional systems: radiator heating, underfloor heating and wall heating.


We are proud that we can present our recent projects, created thanks to the efforts of our great team  and our satisfied customers.

  • 2018
  • 2017
    INX HOTEL ****
  • Hotel Hilton Kraków
    Hotel Hilton Garden Inn
  • 2013
    "BACHLEDÓWKA" Hotel, Czerwienne