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Ahlsell Products Heating and Sanitation Installation pipes and parts Underfloor heating systemsUnderfloor heating, LK

Underfloor heating, LK

Looking for underfloor heating systems for your HVAC project? At Ahlsell, you will find a carefully selected selection of underfloor heating systems. There are many different products in our range - so you can find the one that's right for you. Among our installation pipes and parts, you will find a variety of styles. Our HVAC experts are happy to assist you in finding the right equipment to deliver a high-quality result. Find out more about our underfloor heating systems here on our website or visit your nearest Ahlsell store.

Products (130)

Frame ArcFrame, LK

Frame ArcFrame, LK

Art. no.: 2410476

LK ArcFrame is a wall bracket intended to be used for LK ArcSense or LK ArcTune.
LK ArcFrame is available in white and black and in different shapes and sizes for adaptation to the property's other contacts and switches.
LK ArcFrame is delivered including screws and plugs and has a hole pattern adapted to the standard appliance box.

Note! Delivery dates Q1 2024

Frame ArcFrame, LK

Frame ArcFrame, LK

Frame ArcFrame, LK

Frame ArcFrame, LK

Frame ArcFrame, LK

Heat circuit distributor RF, LK

Heat circuit distributor RF, LK

Art. no.: 2410258V

Stainless steel underfloor heating distributor with integrated adjustment valves, flow indicators, thermometers as well as venting and refill valves.
The distributor is supplied pre-assembled on bracket. The by-pass distributor includes marking plates, protective bag (protection for e.g. concrete splashing when casting) and assembly instructions. Connection of heating supply can be done either from the right or left side. The distributor is available with connections from 2 to 12 underfloor heating circuits. The heating circuit distributor can be supplemented with 2 shut-off valves (RSK 241 75 50), LK By-Pass RF and LK Connection couplings RF for relevant pipe dimensions.

Heat circuit distributor RF, LK

Heat circuit distributor RF, LK

Heat circuit distributor RF, LK

Heat circuit distributor RF, LK

Heat circuit distributor RF, LK

Room thermostat S2, LK

Room thermostat S2, LK

Art. no.: 2434399

Electronic, soundless room thermostat with Triac outlet and electronic feedback. Available in models S2 and S2 EXT with S2 EXT having optional connection compatibility with LK External Sensors, ICS/S2 to control floor temperature. The thermostat is mounted against the device box or directly over the cables where they come out of wall via an electric conduit. Use the enclosed cover frame when installing the device box.

Actuator adapter VA, LK

Actuator adapter VA, LK

Art. no.: 2434611

Room thermostat S1, Underfloor Heating, LK

Room thermostat S1, Underfloor Heating, LK

Art. no.: 2417287

Electronic, soundless room thermostat with Triac outlet and electronic feedback. For the best energy efficiency the room thermostat works with so-called self-modulating technology via signal pulsing to the valve actuators. The self-modulating technology adapts the underfloor heating output in relation to the set temperature. When the room temperature gets close to the set temperature, the output is reduced to avoid excessive temperatures.

Heater 350 comfort heater, for shunt, LK

Heater 350 comfort heater, for shunt, LK

Art. no.: 2419119

LK Heater 350 is an electric comfort heater for underfloor heating installations provided with LK Mini Shunt M60. The heater consists of an electric cartridge fitted in a brass tube. The electric cartridge is controlled by an electronic control unit for constant control of the water temperature. The product is sold complete for 1 or 2 underfloor heating circuits in 12 or 16 mm pipe dimensions The electric cartridge output is 350W and is sufficient in normal conditions for underfloor heating areas of up to 12 m².

Floor heating pipe PE-Xa, for underfloor heating only, LK

Floor heating pipe PE-Xa, for underfloor heating only, LK

Art. no.: 2417501V

Floor heating pipe PE-Xa, for underfloor heating only, LK

Floor heating pipe PE-Xa, for underfloor heating only, LK

Floor heating pipe PE-Xa, for underfloor heating only, LK

Floor heating pipe PE-Xa, for underfloor heating only, LK

Floor heating pipe PE-Xa, for underfloor heating only, LK

Room thermostat RF ICS.2, LK

Room thermostat RF ICS.2, LK

Art. no.: 2434620

Wireless room thermostat with backlit display for clear and simple function display.
In addition to other functions, the display shows the set and actual temperature, heat on/off, operation mode, and error messages.

Room thermostat RF ICS.2, LK

Installation cabinet Mini shunt cabinet M60n Prefab-4, LK

Installation cabinet Mini shunt cabinet M60n Prefab-4, LK

Art. no.: 2989170

LK Minishunt cabinet M60n Prefab is delivered as a complete unit with mounted LK Minishunt M60n and LK Mini distributor including couplings for connecting underfloor heating pipes dim 16.
Note!
The cabinet is intended for right-hand mounting, i.e. connection to the shunt group is made from the right side of the cabinet, via the cabinet bottom.
The cabinet has a tight bottom with rubber pipe penetrations. The bottom of the cabinet is equipped with a drainage spout, which means that any leakage water is drained to an inspectionable place.
The cabinet is made of 1 mm powder-coated steel sheet, RAL 9016. The cabinet is intended to be mounted built into a wall or externally on a wall. The minimum rule thickness for installation is 145 mm.
The cabinet is supplemented with a frame/door. There are two types of frame/door depending on whether the cabinet is mounted inside or outside on an inner wall. In case of external assembly, the cabinet must also be supplemented with a plinth for hiding pipes between the cabinet and the floor.
The cabinet is delivered with pipe penetrations, bellows sleeve for drainage, drainage bend with outlet washer, cable penetrations for room regulation, splash guard and assembly instructions.
The back of the cabinet is equipped with four pre-assembled M8 nuts that can be used for attachment to the LK Cabinet Stand when you wish to assemble the cabinet before a concrete slab is cast.
For other possible variants and tailor-made cabinet solutions, contact us at LK.

Room thermostat, BAS S2. LK

Room thermostat, BAS S2. LK

Art. no.: 2434398

Room thermostat S2, 24V NC. white / ice-gray.

Connection Box NO 230/24 V, power-off open function, LK

Connection Box NO 230/24 V, power-off open function, LK

Art. no.: 2410459

LK Junction box NO is used for connecting and powering the LK Room thermostat 24V NO and LK Actuator 24V NO. The box has a built-in transformer 230/24V AC 40VA.
Up to 8 LK Room thermostats 24V NO and max 12 LK Actuators 24V NO can be connected to the box. The box is equipped with a voltage-free relay which allows the connection of a circulation pump. The junction box has an integrated 24-hour valve and pump logic exercise program.

Connection Box NO 230/24 V, power-off open function, LK

Connection coupling RF, accessory for heating circuit distributor, LK

Connection coupling RF, accessory for heating circuit distributor, LK

Art. no.: 2419466

For connection of pipe to LK Heating circuit distributor RF.

Drainage bend V2, LK

Drainage bend V2, LK

Art. no.: 1882611

Complete spare parts package for mounting drainage bend with outlet washer for LK Fördelarskåp GV and UNI.
LK Drainage bend V2 complete is included in LK Distributor Cabinet GV and UNI.
The spare parts package contains a bellows sleeve, drainage bend, white outlet washer and two mounting screws.
For a more exclusive look, the LK Outlet Washer V2 chrome can be purchased at, RSK 188 26 14.
For length adjustment of drainage bend to wall, LK Drainage Cutter V2, RSK 188 26 15. is suitably used.

Drainage bend V2, LK

Room thermostat S1 Dti, LK

Room thermostat S1 Dti, LK

Art. no.: 2417289

Electronic with Triac output adapted to LK Underfloor heating system.

Air vent RF, accessory for heating circuit distributor, LK

Air vent RF, accessory for heating circuit distributor, LK

Art. no.: 2417299

Intended for Heating circuit distributor RF. The air vent is mounted instead of one of the distributor’s manual air vent. The air vent has both a manual and automatic air vent function. The threaded connection is supplied with O-ring seal for heating circuit distributor.

Coupling Inv gg, accessory for heating circuit distributors, LK

Coupling Inv gg, accessory for heating circuit distributors, LK

Art. no.: 2417463

Straight coupling with internal thread intended for PE/PE-X pipe.

External Thread Coupling, accessory for heating circuit distributors, LK

External Thread Coupling, accessory for heating circuit distributors, LK

Art. no.: 2417464

Adaptor coupling for LK Underfloor heating pipe.

Mini Distributor, Accessory for Heating Circuit Distributor, LK

Mini Distributor, Accessory for Heating Circuit Distributor, LK

Art. no.: 2417475

For LK mini shunt.

Mini Distributor, Accessory for Heating Circuit Distributor, LK

Mini Distributor, Accessory for Heating Circuit Distributor, LK

Mini Distributor, Accessory for Heating Circuit Distributor, LK

Mini Distributor, Accessory for Heating Circuit Distributor, LK

Mini Distributor, Accessory for Heating Circuit Distributor, LK

Regulating 2-Port Ball Valve, Belimo

Regulating 2-Port Ball Valve, Belimo

Art. no.: 2417550

Shut-off valve for LK Heating circuit distributor RF.

Pipe bending support, accessory for heating circuit distributor, LK

Pipe bending support, accessory for heating circuit distributor, LK

Art. no.: 2417560

Pipe bending support for LK Universal-/ Heating pipe. As an accessory there is the LK Fixing plate (RSK 241 79 02) for fixing of pipe bending support.

Fixing plate, accessory for heating circuit distributor, LK

Fixing plate, accessory for heating circuit distributor, LK

Art. no.: 2417902

Provides fixing for LK Pipe bending support RSK 241 75 60 when mounting. Room for 8 underfloor heating circuits on one plate. Ability to join more plates for increased number of underfloor heating circuits. Made of polyethylene.

Angle Ball Valve G25xR25, Accessory for Heating Circuit Distributor, LK

Angle Ball Valve G25xR25, Accessory for Heating Circuit Distributor, LK

Art. no.: 2417958

Shut-off valve for LK Heating circuit distributor RF.

Straight connection set, accessory for heating circuit distributor, LK

Straight connection set, accessory for heating circuit distributor, LK

Art. no.: 2418110

Straight coupling with external thread intended for PE/PE-X pipe.

Angle connection set, accessory for heating circuit distributor, LK

Angle connection set, accessory for heating circuit distributor, LK

Art. no.: 2418112

Connection kit for connection PEX feed pipe to LK Heating circuit distributor VKF.

Transition nipple ext/int, accessories for heat circuit distributor, LK

Transition nipple ext/int, accessories for heat circuit distributor, LK

Art. no.: 2419618

LK Transition nipple can be used when LK OptiFlow EVO II, G25 is to be installed. Transition nipple is also suitable for LK Distribution control.

Transition nipple ext/int, accessories for heat circuit distributor, LK

Return valve VKF/VKF-i, accessory for heating circuit distributor, LK

Return valve VKF/VKF-i, accessory for heating circuit distributor, LK

Art. no.: 2418431

Replacement valve for LK Heating circuit distributor VKF and VKF-i. The return valve is located on the lower distributor pipe, normally fitted with actuator.

By-Pass RF, accessory for heating circuit distributor, LK

By-Pass RF, accessory for heating circuit distributor, LK

Art. no.: 2419469

Complete kit for mounting of by-pass with kvs 0.05 to LK Heating circuit distributor RF. The by-pass extends the installation by 15 mm.

Heat exchanger package 10, LK

Heat exchanger package 10, LK

Art. no.: 2418810

The LK Heat exchange pack has in mind glycol blend floor heating systems which need to be separated from the other heating system, for example outhouses, conservatories, garages, i.e. spaces which you want to maintain at a low temperature in winter or alternatively can be switched off without risk that the underfloor heating system freezes.

Underfloor heating pipe, LK

Underfloor heating pipe, LK

Art. no.: 2416713

Polyethylene pipe with oxygen diffusion barrier for underfloor heating systems. Max operating pressure 6 bar. Max continuous operating temperature 60°C (short-term loading 70°C).

Underfloor heating pipe, LK

Underfloor heating pipe, LK

Underfloor heating pipe, LK

Underfloor heating pipe, LK

Underfloor heating pipe, LK

Pipe holder bracket, in a bag of 100 pieces, for embedding in concrete, LK

Pipe holder bracket, in a bag of 100 pieces, for embedding in concrete, LK

Art. no.: 2417517V

Intended for fastening the pipe at turns when installing LK Underfloor heating strip or LK System board.

Floor heating list, Underfloor heating, for embedding in concrete, LK

Floor heating list, Underfloor heating, for embedding in concrete, LK

Art. no.: 2417699

For LK Universal pipe/LK Underfloor heating pipe. Intended to be used where the required additional insulation is installed. The strip is fastened to the insulation with LK Pipe holder bracket RSK 241 75 17 or 241 81 08. The strip is fastened to concrete flooring by screwing, pressing or nailing. Tip! For a more convenient and quicker installation of LK Underfloor heating strip 16, use LK Staple gun 3D Premium with associated staples.

Pipe shell 16-20, for embedding in concrete, LK

Pipe shell 16-20, for embedding in concrete, LK

Art. no.: 2419485

LK Pipe holding nails 16-20 are intended for fastening of LK Universal pipes/LK Heating pipes in the dimensions 16-20 when laying on the insulation.

Heating pipe PE-Xa RiR LK

Heating pipe PE-Xa RiR LK

Art. no.: 2417829

Supplied installed in an empty pipe of HD Polyethylene and intended to be used as a supply pipe between the heat source and LK Heating circuit manifold.

Heating pipe PE-Xa RiR LK

Heating pipe PE-Xa RiR LK

Heating pipe PE-Xa RiR LK

Floor plate 16, LK

Floor plate 16, LK

Art. no.: 2417549

With 3 grooves c/c 200 mm suitable for LK Universal pipe 16 mm. Hot dip zinc-coated heat distribution plate 0.5 mm for underfloor heating installations between floor joists with a c/c of 600 mm between the joists and where a self-supporting floor is to be laid directly on the floor joists.

Track turntable Wood 22, on floor joists, LK

Track turntable Wood 22, on floor joists, LK

Art. no.: 2417818

Flooring grade chipboard, 22 mm with turning groove on the upper side c/c 200 mm for LK Universal pipe dim. 16 mm. The board is available in two quality classes, standard V20 and moisture resistant V313. Build height incl. pipe 22 mm. Turning groove on the upper side. Can be fitted in both open and closed floor structures. 4 slots for entry to/exit from the joist compartments.

Heat distribution plate 16/190, LK

Heat distribution plate 16/190, LK

Art. no.: 2418009

LK Heat distribution plate for LK Universal pipes.
Made of 0.45 mm aluminium. The heat distribution plate is intended for LK Slotted board Wood 22 and XPS 30 and 50 mm. The heat distribution plate can also be used for underfloor heating installations on spaced panel. The plate is prepared with break notches

Groove board Heat Floor 22, for floor joists, LK

Groove board Heat Floor 22, for floor joists, LK

Art. no.: 2418902

Flooring grade chipboard, 22 mm, with tongue on all four sides. The board has 3 grooves c/c 200 mm for LK Universal pipe 16 mm. Available in two quality classes, standard V20 and moisture resistant V313. The slotted board must be complemented with LK Heat distribution plate 16/190, RSK 241 80 09. Build height incl. pipe 22 mm.

Press Coupling PV Straight Ext. Male, LK

Press Coupling PV Straight Ext. Male, LK

Art. no.: 2417041

Press coupling for LK heating pipe PE-X. Red ring colour.

Press Coupling PV Straight, LK

Press Coupling PV Straight, LK

Art. no.: 2417040

Press coupling for LK heating pipe PE-X. Couplings in dim. AX16 and A32 have grey ring colour. Couplings in dim. 20 x 2.0 and 25 x 2.3 have red ring colour.

Press Coupling PV Straight - CU, LK

Press Coupling PV Straight - CU, LK

Art. no.: 2417053

Press coupling for LK heating pipe PE-X. Red ring colour.

Frame S1, room control, LK

Frame S1, room control, LK

Art. no.: 2417292

LK Pattress S1 is used where necessary to increase the thermostat’s mounting area. Intended for LK Room thermostat S1, S1 EXT and S1 Dti. Colour, white polished RAL 9010.

External sensor ICS, room regulation, LK

External sensor ICS, room regulation, LK

Art. no.: 2417323

LK External Sensor ICS is an accessory to LK Thermostat ICS-RF or LK Thermostat ICS-W to, for example, control the floor temperature.

Terminal Block 1, room control, LK

Terminal Block 1, room control, LK

Art. no.: 2417328

Terminal block 1 is a single connection terminal block used when you want to control the temperature in smaller underfloor heating systems.

Thermostat valve set Mini (NO), room control, LK

Thermostat valve set Mini (NO), room control, LK

Art. no.: 2417338

Thermostat vent set is used for individual control of each underfloor heating loops on LK Mini manifold.

Actuator 24V AC, room control, LK

Actuator 24V AC, room control, LK

Art. no.: 2417591

For individual room/zone control for LK Heating circuit manifolds VKF/ VKF-i. The actuator is used together with LK Wired or LK Wireless room control systems.

Transformer, room regulation, LK

Transformer, room regulation, LK

Art. no.: 2417747

Transformer with plug and cable for connection to LK Connection terminal block 1, LK Actuator relay 24 V and LK Electronic Thermostat TR 26.

Actuator 230V AC (NC), room control, LK

Actuator 230V AC (NC), room control, LK

Art. no.: 2418121

For individual room or zone division for LK Heating circuit distributors.

Heat regulation Control v.3 for distribution manifold, LK

Heat regulation Control v.3 for distribution manifold, LK

Art. no.: 2417325

Outdoor temperature compensated heating control pre-programmed for LKs Shunt program/underfloor heating systems.
Intended for: LK Manifold shunt VS
LK Manifold shunt VSLK Shunt 2/3-2.5LK Shunt 2/3-4.0LK Shunt 2/3 6.3LK Shunt UHP- 6.3

Shunt 2/3-2.5, LK

Shunt 2/3-2.5, LK

Art. no.: 2418087

Shunt group intended for systems with a main pump. Its capacity can be set by default, at a heating need of 50W/m², to max 300 m² floor heating area. However, the capacity depends on the primary temperature, pressure, laying method, etc. The shunt group is complete, factory-fitted with:
Circulation pump Grundfos UPS 25-60 single-phase 230 V AC 50 Hz, max 90 W 0.40 AControl valve Kvs 2.5 re-settable between 3- and 2-way versions, provided with manual control device.Adjustment valve LK OptiFlow for primary circuit Non-return valve2 contact thermometersShut-off valvesCan be assembled in both right- and left-hand operationWall bracket
LK Shunt can be supplemented with LK Control v.3 RSK 241 73 25.

Thermostat M60 for shunt, LK

Thermostat M60 for shunt, LK

Art. no.: 2418088

LK Thermostat with 5 m capillary tube connected room sensor to LK Minishunt M60.

Receiver Unit 1 ICS.2 (NO), LK

Receiver Unit 1 ICS.2 (NO), LK

Art. no.: 2434626

LK Receiver Unit 1 ICS.2, used with LK Room Thermostat RF ICS.2 (Wireless), or LK Room Thermostat W ICS.2 (wired).

1 LK Room Thermostat ICS.2 can be addressed/connected to the receiver unit. The unit can control up to 5 LK actuators 24 V (NO).

The unit has a preset 24 hour program for valve motion. Additionally, the device can communicate wirelessly with several LK receiver units ICS.2 in larger systems.

OptiFlow EVO II, LK

OptiFlow EVO II, LK

Art. no.: 2419610

LK OptiFlow EVO II is a flow adjustment valve for adjusting the flow of ,eg., an underfloor heating system, traditional heating system or cooling system. The valve is available in two different flow ranges, 2-16 l itre/min or 4-36 litre/min respectively. The adjustment valve has G25 external thread on the inlet and G25 internal thread on the outlet. The external thread can be supplemented, eg., with an LK transitional nipple with free nut for easy mounting against ,eg., an LK heating manifold RF for underfloor heating.

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