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Water Underfloor heating Calculator

When specifying the area, take into account the necessary margins from the walls.
Units of measurement are square meters.
The area of the water underfloor heating
Purpose of the calculated room Room assignment
The required air temperature in the calculated room.
The units of measurement are degrees Celsius.
Desired indoor air temperature
The temperature of the air in the room below.
If there is no room, specify 0.
The units of measurement are degrees Celsius.
The air temperature in the lower room
The step of laying the water underfloor heating pipe.
Units of measurement are millimeters.
Pipe pitch
The type of pipes used in the water underfloor heating system, the outer diameter and wall thickness. Pipe type
The temperature of the liquid at the outlet of the boiler to the water underfloor heating system.
The units of measurement are degrees Celsius.
Liquid temperature at the inlet
The temperature of the liquid at the entrance to the boiler from the water underfloor heating system. On average, the temperature of the liquid at the entrance to the water underfloor heating system is 5-10% lower.
The units of measurement are degrees Celsius.
The temperature of the liquid at the output
The length of the pipe from the boiler to the calculated room "back and forth".
Units of measurement are meters.
Length of the supply line
The approximate amount of heat needed to heat the room.
Units of measurement - Watts.
Room heat loss

Layers ABOVE pipes:


Layers UNDER the pipes (starting from the pipe):


Thermal calculations

Total heat flow 1277.6 W
Specific heat flow in the upward direction 79.85 W/m2
Specific heat flow in the downward direction 10.01 W/m2
Total specific heat flow 89.86 W/m2
Total heat flow per linear meter 13.48 W/m
Average liquid temperature 32.5
Maximum floor temperature 26.92
Minimum floor temperature 24.27
Average floor temperature
The floor temperature is comfortable.

Hydraulic calculations

Pipe length 116.67 meters
It is necessary to divide the room into 2 loops by 63.33 meters
Thermal load on each loop 786.32 W
Fluid flow in each loop 0.027 kg/s
Fluid velocity
The fluid velocity is normal.
0.237 m/sec
Linear pressure losses in the loop
Linear pressure losses are normal.
6895.17 Pa
Total volume of liquid 13.19 liters

Information on the purpose of the calculator

The online water underfloor heating calculator is designed to calculate the main thermal and hydraulic parameters of the system, calculate the diameter and length of the pipe. The calculator provides an opportunity to calculate the underfloor heating, implemented in a "wet" way with the arrangement of a monolithic floor made of cement-sand mortar or concrete, as well as with the implementation of a "dry" method, using heat-distributing plates. The device of the TP system by the "dry" method is preferable for wooden floors and ceilings.

If the maximum permissible values of the main parameters are overestimated, the calculator will indicate errors.

Heat flows directed from bottom to top are the most preferable and comfortable for human perception. That is why room heating with warm floors is becoming the most popular solution compared to wall-mounted heat sources. The heating elements of such a system do not take up additional space, unlike wall radiators.

Properly designed and implemented underfloor heating systems are a modern and comfortable source of space heating. The use of modern and high-quality materials, as well as correct calculations, allows you to create an efficient and reliable heating system with a service life of at least 50 years.

The underfloor heating system can act as the only source of room heating only in regions with a warm climate and using energy-efficient materials. In case of insufficient heat flow, the use of additional heat sources is mandatory.

The calculations obtained will be especially useful for those who plan to implement a underfloor heating system with their own hands in a private house.

For a more accurate calculation, be sure to contact qualified specialists in your region!

General information on the results of calculations

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