I.Underfloor heating pipesIs it better to have a denser substrate?
Underfloor heating systems do not necessarily require tight spacing, and excessive density of underfloor heating pipes can also lead to problems. The spacing between underfloor heating pipes should be determined based on the calculation of the heat load.
What are the standard spacing requirements for underfloor heating pipes?
According to relevant regulations, the spacing between underfloor heating pipes should be between 150 and 300 millimeters, and the distance between underfloor heating pipes should be determined based on the specifications and sizes of the underfloor heating pipes, the intended use of the room, and the insulation effect. For example, if the underfloor heating pipes are DN16 pipes, the spacing between the pipes is typically 150 millimeters. If the underfloor heating pipes are DN20 pipes, the spacing between the pipes is typically 200 millimeters. If the insulation effect of the room is poor, the pipes can be laid more closely. When installing underfloor heating, the spacing between pipes in areas such as underfloor heating tracks and near windows can be reduced appropriately.
Three. Why should the space between underfloor heating pipes not be too close?
There are many disadvantages to having too many underfloor heating pipes. If not installed correctly, it not only makes living in the property uncomfortable in the future, but also reduces the lifespan of the underfloor heating system.
1、If the underfloor heating pipes are too dense, it can cause the floor to crack.
Because the underfloor heating pipes are often laid in a coiled manner, backfilling is usually required. During backfilling, if the pipes are too densely packed, this area may not be filled with concrete. If there is a large, densely packed area of underfloor heating pipes, it is very likely to crack after concrete is poured. Furthermore, the cracks will become increasingly severe.
2. If the underfloor heating pipes are too dense, it will also be impossible to coil them for installation.
Currently, most underfloor heating systems utilize PEX or PERT pipes, which are plastic materials with some degree of flexibility. However, if underfloor heating pipes are tightly coiled with a spacing of less than 100mm, it can lead to the pipes being bent.
3. Excessive pipe density in underfloor heating systems can lead to excessive bending of the radiators.
This means there are many bends in each pipe, especially where the pipes turn. The increased resistance to water flow due to these bends makes it unsuitable for circulating hot water in a geothermal heating system. Consequently, it is not possible to achieve optimal heating performance.
4. When underfloor heating pipes are tightly coiled, the length of a single circuit can become excessively long.
According to the regulations, there are specific requirements for the heating pipes used in ground source heating systems, typically with a maximum length of 120m per pipe. However, in practical applications, the length is usually no more than 90m. A common configuration involves heating pipes with lengths of 70~80m, which provides the optimal water circulation.
5、There may be excessive loops in the indoor underfloor heating circuit.
If the underfloor heating system has a very dense configuration, it will inevitably increase the length of the piping. However, there is a maximum length requirement for the piping. This can lead to an excessive number of loops in the indoor circulation system. However, an excessive number of loops can negatively impact the main supply and return piping, which are typically DN25 or DN32. once the number of loops exceeds 10, it is necessary to increase the diameter of the main supply pipe. However, this is not feasible.