Group G - Radiant Heating Systems

Group Leader Mr. Luciano Santi Spa System

The Group meets regularly to the examination of the issues that affect their activities both at national and European level. This applies, for example, to the evolution of both Directives and regulations of the comparison between the companies is critical as it allows the Association to play an important role on the national and European tables where necessary to bring the point of view of companies Assotermica.
the main topics within the Group can be summarized as follows:
- Participation in the work of standardization bodies Italian UNI - CIG - CTI
- Participation in technical committees of CEN standardization;
- Membership of the committees of the European manufacturers;
- Interpretation of the legislation (Directives, laws and decrees Italian)
The group's companies:
Within Assotermica, the group G is formed by the major domestic manufacturers of equipment and systems for radiant heating at high temperature:
The group's companies:


Definition of radiant systems

The high temperature radiant systems are devices suitable for heating medium-large volumes exploiting the transmission of heat by radiation.
The heat propagates in three different ways: conduction, convection and radiation. With the irradiation (the effect of which is similar to that of the solar rays) is possible to heat the objects and people without the need to also heat the surrounding environment.
In systems in insolation, the useful effect is achieved by bringing a high temperature surface, so that emits infrared radiation towards the area to be heated.
There are three types of equipment most used:

Systems incandescent
These are systems where a metal surface or ceramic, is brought to high temperature by combustion of gas or by means of electrical resistances, to become incandescent. The radiating element is contained in a casing which acts as a protective screen and which directs the heat radiation to the areas to be heated.

Radiant tubes.
They consist of a metal tube equipped with a burner at one end. The combustion products run internally the tube, heating it and are discharged at the opposite end.
The surface of the tube is heated and exchanges heat radiation with the surrounding environment. As well as for systems filament, the tube is suitably shielded to direct thermal radiation.
Constructively are often made by bending a pipe of several meters in length in the shape of "U" narrow, so that the burner and flue gas exhaust are located on the same side. Average surface temperatures of the radiant tubes are lower than those of incandescent systems and generally roam about 350 ° C.

Tapes radians.
Conceptually not deviate from radiant tubes, but are constructed with diameters of the pipe higher and with a greater development in length (several tens of meters) and provide for the recirculation of the fumes. Although these systems are equipped with screens to direct the infrared radiation and are characterized by surface temperatures of the radiating element lower than the other systems (150-300 ° C).

A characteristic of all radiant systems is to achieve operating temperatures in a very short time (a few minutes)

Standardization committees of reference
CEN TC 180 - Decentralized Heating gas
IGC C4 national interface CEN / TC180
CTI SC6 GL 601 - Heating systems: design, energy needs and security

EC Directives and Regulations
Directive 2010 / 31 / EC recast EPBD (Energy Performance of Buildings Directive)
Directive 2009 / 142 / CE gas appliances
DG ENER Lot 20 Local room heating products

Laws and decrees

DPR. 01-08-2011 n ° 151. New regulations for fire prevention
Decree of July 27 2010 technical rules for fire prevention for commercial activities.