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Architecturally thought-out
Floor-to-ceiling window areas convey freedom and offer a wonderful view outside. However, in the autumn and winter months, the cold penetrates the room through the large glass surfaces. At low temperatures, the impact of the cold is unpleasantly noticeable. But: A trench heating system shields the cold from outside and thus prevents condensation on the glass surfaces.
Large window fronts allow an unobstructed view of your garden. To keep it cozy and warm inside during winter, trench heating systems quickly shield the cold from outside. With a trench heating system, you can also temper your conservatory and keep it free from condensation.
Your advantages
✅ Quickly creates a warm air curtain along cold glass surfaces
✅ Condensation on glass fronts can be avoided
✅ Roll and linear grilles in three colors
✅ Integrates discreetly into the floor – window appearance remains undisturbed
✅ Immediately walkable after installing the grilles
Hardly visible, but noticeable. The trench heating system integrates discreetly into the floor – the large glass surfaces remain unrestricted. Roll and linear grilles in three colors adapt to the flooring.
Your advantages
✅ Warm air curtain in front of glass fronts – prevents cold influence in living and working areas
✅ Unobtrusive appearance
✅ Flexible in design – roll and linear grilles in three colors
✅ Sustainable heating – combined with low-temperature surface heating systems
✅ Easy cleaning – grilles are easy to remove
Underfloor convectors are the solution for large glass surfaces and conservatories. They are placed directly in front of the window in the floor. Variotherm delivers the right length, pre-assembled and ready to install. Miters are not an issue.
Your advantages
✅ Simple and cost-effective installation
✅ Lengths delivered according to requirements
✅ Miters possible
✅ Height adjustable after installation
✅ Underfloor heating heats up quickly – easily controllable
Large window fronts allow an unobstructed view of your garden. To keep it cozy and warm inside during winter, trench heating systems quickly shield the cold from outside. With a trench heating system, you can also temper your conservatory and keep it free from condensation.
Your advantages
✅ Quickly creates a warm air curtain along cold glass surfaces
✅ Condensation on glass fronts can be avoided
✅ Roll and linear grilles in three colors
✅ Integrates discreetly into the floor – window aesthetics remain undisturbed
✅ Immediately walkable after installing the grilles
Hardly visible, but noticeable. The trench heating system integrates discreetly into the floor – the large glass surfaces remain unrestricted. Roll and linear grilles in three colors adapt to the flooring.
Your advantages
✅ Warm air curtain in front of glass fronts – prevents cold influence in living and working areas
✅ Discreet appearance
✅ Flexible design – roll and linear grilles in three colors
✅ Sustainable heating – combined with low-temperature surface heating systems
✅ Easy cleaning – grilles are easy to remove
Underfloor convectors are the solution for large glass surfaces and conservatories. They are placed directly in front of the window in the floor. Variotherm delivers the right length, pre-assembled and ready to install. Miters are not an issue.
Your advantages
✅ Easy and cost-effective installation
✅ Lengths delivered according to requirements
✅ Miters possible
✅ Height adjustable after installation
✅ Underfloor heating heats up quickly – well controllable
Details and Components
All Variotherm Trench Heating Systems are delivered pre-assembled in the correct length and only need to be aligned and screwed on site. Optionally, Variotherm supply and return valves or 3/4" connection elbows for the supply pipe can also be pre-assembled.
The holes for the supply pipes are made, according to customer requirements, either in the end caps or in the side walls.
How a Trench Heating System Works
The floor convectors are recessed into the floor and flush with the floor covering. They are installed directly in front of large glass surfaces. The heart of the Variotherm underfloor heating is the heating element: a copper pipe with attached aluminum fins. Warm water flows through the pipe, heating the fins.
A warm air curtain forms along the cold glass surface – the cold from outside is shielded, and the room is comfortably warm. This physical reaction is called the Coandã Effect.
It is important that the heating element is installed directly on the window side to effectively shield the cold air. At the same time, there is minimal air circulation.
Our tip: To ensure that the trench heating system is actually flush with the finished floor, you should consider the height of the floor covering during planning.
Individual planning
We not only deliver high-quality heating and cooling systems, but also plan each project individually – house by house, room by room, precisely according to our comfort criteria. Thanks to precise heating and cooling load calculations, we ensure maximum efficiency and optimal comfort.
This creates a tailor-made solution that perfectly fits your project – for a pleasant indoor climate all year round.
Heating elements
The heating elements are the technical core of the Variotherm Trench Heating System. They work very efficiently and distribute the heat optimally.
The elements consist of a copper pipe ø 18 × 0.5 mm (DIN EN 12 449) with aluminum fins 56 × 78 mm. Through the special production process, the pipe and the aluminum fins are connected. This makes them particularly powerful.
Heating elements
The heating elements are the technical core of the Variotherm Trench Heating System. They work very efficiently and distribute the heat optimally.
The elements consist of a copper pipe ø 18 × 0.5 mm (DIN EN 12 449) with aluminum fins 56 × 78 mm. Through the special production process, the pipe and the aluminum fins are connected. This makes them particularly powerful.
Simple and quick to install
All trench heating systems are delivered by Variotherm in the correct length, fully pre-assembled, and only need to be aligned and screwed in place on site. The trench can be precisely adjusted to the desired floor level using the internal adjustment screws. Adjustments can be made at any time afterwards. No underfilling is necessary.
Dimensioning and Arrangement
When planning the trench heating system, the maximum flow temperature is important to ensure the room becomes comfortable – we recommend a maximum of 60 °C. If the flow temperature is higher, the fin temperature exceeds the temperature of dust smoldering. This can lead to unhealthy breathing air. The most pleasant room climate is achieved with a maximum flow temperature of 50 to 55 °C.
The Ideal Case:
The optimal cold insulation is achieved when the Trench Heating System is installed along the entire glass surface (glass surfaces in contact with the ground, such as in conservatories, patio doors).
Recommended maximum length of a heating circuit:
BKH1, BKH1 mini: 7.5 m (7.5 m heating element) BKH2, BKH2 mini: 5.0 m (10 m heating element)
Those who combine the Trench Heating System with an area heating (Floor, Wall, Ceiling) completely cover the heat demand and achieve an all-around comfortable room climate.
Frequently Asked Questions
The floor convectors are recessed into the floor and flush with the flooring. They are installed directly in front of large glass surfaces. The heart of the Variotherm underfloor heating is the heating element: a copper pipe with attached aluminum fins. Warm water flows through the pipe, which heats the fins. A warm air curtain forms along the cold glass surface – the cold stays outside.
Trench Heating Systems are underfloor heating systems, which means they are recessed into the floor and flush with the floor covering. The floor convectors are installed directly in front of large glass surfaces and quickly create a warm air curtain.
A trench heating system quickly creates a warm air curtain along cold glass surfaces. Condensation on the glass panes is no longer an issue. The underfloor convectors integrate discreetly into the floor, leaving the window aesthetics undisturbed. The heating is walkable immediately after the cover grilles are installed.
The energy-saving underfloor convectors are used along large floor-to-ceiling glass surfaces, in conservatories, and as room heating, combined with surface heating. Further information on the trench heating system can be found here.