CHAPTER I

Thermal comfort in buildings

Thermal comfort is related to ambient indoor temperature. To get the sensation of thermal comfort must make physical factors of the environment which influences the heat balance of the body.

The human body has the ability under the influence of heat transferred from the environment to adapt their internal body heat within certain limits required. If these limits are violated the feeling of discomfort with the appearance of thermal destruction of buildings and health problems.

Between these limits there is a beach where the body feels good called “ comfort range”

The temperature inside the room

The temperature inside must be correlated with environmental conditions.                                                       An important factor in this respect has human clothing.

Room or activities room	Standard interior temperatures as HRH 6 / 1, 3
Activity sitting	19ºC
Activity standing	17ºC
Office	20ºC
Store	19ºC
Bathroom	24ºC
Hard work	12ºC
Bedroom	18ºC
Maximum temperature in a room	26ºC

Internal temperature distribution in rooms

Very important is the uniformity of temperature distribution inside the room to be incalzita.Factorii on which uniformity of distribution are:                                                                                                                           -type heating

-Positioning of the heating                                                                                                                         -size heating bodies

- outside temperature                                                                                                                                     - location Windows

If radiators, fireplaces or stoves uniform heat distribution is difficult to achieve.                                                 To increase the heating surface with a better uniformity of heat distribution and especially in a relatively small it was the whole surface of the floor warming solution.

The ideal situation in the world of the heating technique is characterized by convenience “clear head and warm feet”  So it is important for people working in the first heating feet perfectly feasible with this type of heating.

Floor temperature

Since the surface of the floor heating is both contact surface and must ensure thermal stability of the foot. Medical limits must be respected in the design and installation of underfloor heating installations.

These values ​​the temperature of the floor will not be exceeded.

Rooms	Floor temperature
Rooms in which to work up.	27ºC
Offices and living rooms	29ºC
Corridors, air locks, hallways, the headroom.	30ºC
Toilets and swimming pools halls	33ºC

Floor Structure

For proper operation of the installation of underfloor heating is important how it is made structure. Heating tubes are completely buried in the screed layer, above the insulation layer.

Floating screed serves as distributor of thermal load.                                                                                Floors for blocks of flats are designed with “ floating screed” corresponding with respect to strength and surface flatness.

Dig and joints

Repect invariably be imposed by setting concrete construction rules:

• The type and thickness of screed and floor finish
• The distribution of the screed as the basis for the arrangement and formation of joint

Execution floor construction joints

Records and fields by digging tube correlate as follows:

• Registers so the tubes are posing to be excluded due to their movement screed expansion.
• Joints can be crossed only pipeline crossing.
• Heating pipes will be protected with a protective tube REHAU.

Stratification of the floor with wet plaster dig up the ground (soil)

1. interior plaster

2 plinth

3. perimeter band

4. finished surface (tile, marble, parquet) that comes in contact with the foot

5. Mortar bed according to DIN 18 560

6. Cement screed floating DIN 18 560 *

7. Tube RAUTHERM

 8. DIN 18 569 sheet cover (foil bituminous) or PE film

9. Soundproofing insulation layer and DIN 4725

10. Waterproof DIN 18 337

11. Concrete slab

12. Ground

The thickness of the subfloor when REHAU system

* Pour a thick concrete floor 52 mm + d (where d = outside diameter of the pipe)

Joints

REHAU screed additives

Additives are added before and during malaxarii screed

Additives have the effect of completely submerging the pipes in screed layer.                                    At the same time increases significantly increases thermal conductivity and resistance to mechanical stresses.

Perimeter strip

Before pouring the screed is applied protective tape on the perimeter walls and door frames. The correct application of the perimeter band is essential to avoid bridging noise and allow smooth expansion of the screed. (Expansion of at least 5mm)

Soundproofing

A sound insulation against noise is achieved by improving the steps correctly dimensioned floor finish.                                                                                                                                                                      We recommend insulating boards PST (polystyrene foam boards last T)

Phono and thermal insulation

Insulating material is applied according to the project in a layer or two, no distance between them. Insulation boards are installed staggered in two layers, insulation polistratificate joints are disposed so that the lower layer to be covered by the upper layer.

Avoid cross joints.

If insulating materials have been provided with different levels of compressibility, lower compressibility material is mounted on top.

In this case the top layer of insulation over the lower layer and the insulating function so the function of the thermal and Soundproofing.

PE film

Before screed, insulation and insulation phono be covered to prevent:

• Sapa to infiltrate the joints between insulation and affect effect Soundproofing
• Water preparation to penetrate the insulation screed. For this purpose, protection, use foil REHAU guy.

Film ends should overlap the edge on a portion of at least 8 cm. If using wet screed, the film covers the adhesive sticks to maintain its waterproof properties to strengthen the screed

Underfloor heating elastic

The floor is elastic gives up heat, largely by radiation, over a large surface.                                                 There are no travel slower than air, so avoid unpleasant effect of raising dust.

REHAU underfloor heating elastic structure from the top layer of finish to the ground

1. top layer of finish

2. load distribution plate (wood or biological material)

3. PE film

4. floor layer blind

5. supports for taking vibration-type spring element

6. RAUTHERM tube S

7. REHAU rail mounting

8. Insulation

9. support block type Chituc

10. waterproofing layer

11. earth (soil)

Application

Heating floor systems can be used for heating rooms in a harmonious villa rooms of a garden, a school classes, an auditorium rooms, a high school classes, gyms, churches, restaurants, supermarkets, hotel rooms, buildings office or industrial production halls, warehouses, parking lots, trail mileage for airports and landing runways, sports fields and stadiums.

The heat in new buildings will be determined under the regulations in force at a level that is covered by the application of floor heating, and takes into account the maximum allowable temperature of the floor surface.

Give up this way to radiators or fan coil heating deoarce body in this case becomes even floor, which acts as a radiant panel there opinion that if the tubing is inserted RAUTHERM floor, plant efficiency increases considerably

In this way the heat is evenly distributed while in a room and the atmosphere is very pleasant atmosphere and setting if the installation of floor heating is correct. RAUTHERM tube-S is resistant to high temperatures and is made of reticular polyethylene at high pressures.

This tube is the type - X and is provided with a layer of protection against vapor diffusion of oxygen.