Underfloor Heating
UNDERFLOOR HEATING · LOW TEMPERATURE · EVEN COMFORT

Underfloor Heating Systems
Efficient, Silent and Even Heat Distribution.

Modern heat distribution solutions that deliver high efficiency at low temperatures with heat pumps, condensing boilers, geothermal systems and solar-assisted heat sources.

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OVERVIEW

Underfloor heating is a low-temperature distribution system that provides even comfort from the floor.

With correct design, pipe spacing, insulation and hydraulic balancing, it creates quiet, unobtrusive and economical heating comfort throughout the building.

In an underfloor heating system, hot water circulates through pipes laid beneath the floor. Heat rises from the floor, creating a more even sense of warmth in the room.

The system works particularly efficiently with heat pumps and condensing boilers, because a lower water temperature than with radiators is often sufficient. This offers the potential to reduce energy consumption.

TYPES OF UNDERFLOOR HEATING

Which underfloor heating system suits which building?

Below, the most common installation types are explained with their technical features, consumption behaviour and benefits for the client.

Water-based underfloor heating
WET SYSTEM

Water-Based Underfloor Heating

Water-based underfloor heating is the most common system, with hot water flowing through PE-X, PE-RT or multilayer pipes beneath the floor. A heat pump, gas boiler, pellet boiler, geothermal system or central boiler can be used as the heat source.

It is one of the best solutions for new buildings. Because it works at low temperatures, it helps heat pumps in particular to achieve high COP values.

Benefits and consumption behaviour

Can operate with a low flow temperature; 30–45 °C is usually sufficient.
Because heat rises from the floor, the room feels evenly warm.
With no visible equipment such as radiators, the interior design is cleaner.
Delivers high efficiency with heat pumps and condensing boilers.
Suitable buildingsNew homes, villas, apartment buildings, offices, hotels, nurseries, low-energy buildings
Operating temperatureFlow temperature of approx. 30–45 °C, depending on the design
AdvantagesComfortable, silent, unobtrusive, efficient at low temperatures
DisadvantagesThe initial installation requires care; repairs after faulty installation may require work on the floor
Dry-system underfloor heating
DRY SYSTEM

Dry-system underfloor heating

Dry-system underfloor heating is lighter than a conventional screed system and can be installed with a lower build-up height. The pipes run within special panels, heat-conducting plates and dry floor layers.

It is preferred particularly in older buildings, on timber floors, in loft conversions and in projects where the floor must not be heavily loaded.

Benefits and points to note

Can be lighter than a screed system.
Responds faster; with less floor mass, the heat-up time can be shorter.
An advantage in refurbishment work where floor height is limited.
Sound and thermal insulation details must be resolved correctly.
Suitable buildingsRefurbishment projects, timber houses, loft conversions, lightweight construction
Energy behaviourCan operate at low temperatures and responds quickly
AdvantagesLightweight, quick installation, low build-up height
DisadvantagesMaterial costs may be higher; requires careful detailing
Electric underfloor heating
ELECTRIC SYSTEM

Electric underfloor heating

Electric underfloor heating works with heating cables or heating mats and requires no water pipework. It offers a practical solution for small areas, comfort zones such as bathrooms, or areas in temporary use.

Before it is used as the main heating for the whole home, the electricity tariff, insulation, power supply capacity and monthly consumption must be calculated carefully.

Consumption and usage logic

Converts electricity directly into heat; efficiency is taken as approximately 1:1.
Provides a quick, practical solution in small bathrooms and local comfort zones.
Continuous use over large areas can increase electricity costs.
A thermostat and time programme are essential for controlling consumption.
Suitable buildingsBathrooms, small rooms, local floor comfort, refurbishment, supplementary heating
Power rangeUsually 100–200 W/m², depending on the application
AdvantagesEasy installation, fast response, no boiler room required
DisadvantagesElectricity costs can be high; not always economical as the main heating
Underfloor heating with manifolds
MANIFOLDS AND CONTROLS

Underfloor Heating with Manifolds and Room Control

In modern underfloor heating systems, each room is connected to the manifold as a separate circuit. Flow adjustment, room thermostats, actuators and controls allow each area to be managed independently.

This approach increases comfort and helps control consumption by reducing unnecessary heating in unused rooms.

Technical advantages

Temperature can be controlled separately in each room.
Hydraulic balancing ensures that all circuits work evenly and under control.
Smart thermostats and zone control create energy-saving potential.
Maintenance and fault-finding are easier at the manifold.
Suitable buildingsVillas, apartments, offices, hotels, homes with many rooms
ControlsRoom thermostats, zone control, actuators, flow meters, automation
AdvantagesComfort, balancing, consumption control, ease of service
DisadvantagesThe initial installation cost may be higher than for a simple system
SUMMARY FOR CLIENTS

What should you consider when choosing underfloor heating?

1. Pipe spacing must be determined by a design calculation.

Every room has a different heat loss. In living rooms, bathrooms and areas with glazed façades or external walls, pipe spacing and circuit length must be calculated accordingly.

2. Without floor insulation, efficiency drops.

Insulation of the correct thickness must be used so that heat is not lost downwards. Otherwise the system will work, but consumption will rise.

3. Circuits need not be the same length, but they must be balanced.

If the flow settings on the manifold are not correct, some rooms may overheat while others stay too cold.

4. Parquet, tiles and other floor coverings matter.

The thermal conductivity of the floor covering affects system performance. Thick, insulating coverings can reduce heat transfer.

Let’s plan the right underfloor heating system for your building together.

We will professionally calculate the pipe spacing, number of manifolds and control system based on floor area, insulation, floor construction, heat source and room use.

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