A new standard in Underfloor Heating... 

For further information please contact
Dedicated Pressure Systems Ltd.
0845 2411441
sales@heatweb.com

  • One day installation
  • 100% natural materials
  • Fast response 
  • Thermal mass
  • Lower running temperatures  
    =  higher efficiency  
    =  saves money



 DPS are proud to present Lithotherm low temperature underfloor heating tiles. 

Tile Size: 550mm x 330 x 45mm
Pipe Size: 14mm

We have seen many ways of providing central heating... radiators, underfloor heating, skirting board heating, wall heating, and more... but when we have to design storage systems to drive central heating the key figure in calculation is the return temperature from the heating. Radiators tend to be the worst load to design for as they may need a flow of 80°C and have a return as high as 70°C, so once the thermal store has dropped to 70°C, it becomes impossible to drive full load, and output drops off. The Lithotherm tiles provide return temperatures as low as 25°C, and compared to radiators give up to five times of effective central heating output from the same sized store. The low temperature also makes it possible to drive central heating using low grade heat sources such as solar, heat pumps, and flue capture systems.  Combine this with the time savings that can be gained from not pouring a screed and waiting for it to dry and you have a system that is impossible to better.

  • The Lithotherm tiles are made of clay, and they have a consistent quality as well as excellent
    rigidity and dimensional accuracy.
  • The small installation height of 45 mm and solid bulk make these plates ideal for dry paved floors at new constructions sites and for renovating old buildings.
  • The construction time can be reduced by many weeks, not having to wait for cement to dry.
  • The heating tubes, which lie on top in close contact with the  tiles in rounded grooves, allow fast temperature regulation.
  • In transitional periods, the system is particularly cost-effective.
  • The heating tubes that run directly under the flooring require a very low flow temperature. This makes the system an excellent combination with fuel value devices, solar systems and heat pumps.
  • The system can also be used for floor or ceiling cooling. 
  • Wall heating can be set up similar to floor heating.
  • The system is fully developed and proven in many installations in Germany.


The heating tubes, which run directly under the floor covering, guarantee direct dissipation of the radiant heat in the room. The grooves in the Lithotherm form plates, which are open towards the top, increase the radiating surface of the floor covering by approximately 60%. The increased upward flow of heat ensures a well-balanced floor temperature and keeps the temperature of the bottom of the Lithotherm form plates approximately 30% lower. With the LITHOTHERM SYSTEM, the room is heated first, and then heat is stored in the Lithotherm form plates after the heating system has been operating for a longer period of time.

Download Data Sheet

 




We can also supply underfloor heating controls including the full range if products from IntaEco. Click here for Product Information.

Further Reading:
Very informative article on hardwood and underfloor heating
DPS Technical Editorial on underfloor heating
Case Study - St. Thomas Church, Streatham
The Process...
 
1. Calculate the heat losses of the property, room by room.
There are many sources of help to do this, some are linked below:
DPS RoomLoss Calculator
Energy Saving Trust (not room by room)
2. Decide on the type of floor surface in each room... tiles or wood.
If you are undecided then bear in mind that tiled or stone floors are better at transmitting heat than wood.
3. Looking at the table opposite (click for a larger view), select the appropriate pipe spacing for each room.  Generally work on a flow temperature of 35°C, although this may have to be lowered to 30°C if using a wooden floor that is susceptible to warping e.g. pipe, parquet flooring.
4. Work out the length of pipe and the number of pipe loops required for each room using the table below.
 
Pipe Spacing Length of pipe
per square metre
of floor area		 Maximum floor area
per pipe loop
90mm 11.1 m 15 m2
135mm 7.4 m 22 m2
180mm 5.6 m 30 m2
225mm 4.4 m 37 m2
5. Decide on a location for the distribution manifolds on each floor, where all pipes connect to. Try to pick a central location if possible, and in some circumstances ore than one manifold per floor may be required. If underfloor heating is installed on more than one floor it will probably help to keep the manifolds above each other to assist in running supply pipework between the manifolds.
Enquiry Form
 
Number of Rooms  rooms
Total Pipe Length  m
Number of Tiles tiles
Tiled Floor Area m2
Wood Floor Area m2
Number of Pipe Loops for each manifold  
Separate manifolds with a comma (,)
 
Email  
Title   
Forename    
Surname
Telephone   
Post Code  
How did you originally 
hear about us ?

 
  

 
6. For each pipe loop, add twice the run distance from the room to the manifold (plus 5m extra for safety) to get a total pipe length for each loop. Add up the lengths of each loop to obtain a total length of pipe required.
7. Multiply the area of each room by 5.5 to obtain the number of tiles required.  Then add up to obtain total number of tiles required.
7. You are now ready to finalise the parts list for the installation and obtain a written quotation.  A quick way of doing this is to fill out the form opposite with the information and send to us.  A full quotation will be sent by return email.