Girad Condensing
Condensing radiant tubes
The only ones with patented Fraccaro condensation unit.
The only high-efficiency ceiling radiant heating tubes with optional condensing system patented by Fraccaro.
Thermal efficiency up to 107% and up to 50% less fuel compared to any warm air generator or underfloor heating system with condensing boiler. EUROPEAN PATENT No. 94115945.1.
The Girad condensing radiant heat generator recovers almost all the latent condensation heat from water vapor in the flue gases produced by gaseous fuels, particularly natural gas. The reduction of flue gas temperature to 45-50°C is achieved through special elliptical stainless steel heat exchangers that absorb the latent heat from combustion gases in the heat recovery unit. The recovered heat is released into the environment through air heaters.
The high-efficiency Girad condensing radiant tube thus achieves a total efficiency of up to 107%, which combined with the performance of radiant tubes with modulating air-gas burner makes it the ideal solution for industrial heating.
The overall savings produced by a Girad condensing radiant tube system can reach 65% compared to traditional warm air heating systems.
The Girad radiant tube system is a heating solution for large spaces consisting of a heat generator with aspirated modulating burner in air stream, a radiant circuit with one or two tubes, and a temperature control device.
The heat generator, fueled by gas or oil, produces a heat-transfer fluid consisting of air and recirculated flue gases. These gases are superheated and circulated under negative pressure through the circuit tubes, generating surface temperatures ranging from 100°C to 300°C based on specific requirements. At these temperatures, the radiant energy needed to ensure optimal comfort is generated. The radiant circuit consists of aluminized steel ducts insulated on three sides, treated with special silicone paints, and pre-assembled at the FRACCARO plant, ready for installation via high-seal flanged joints.
Key benefits
Other advantages
- EXCELLENT THERMAL EMISSION generated by the large radiating surface with high emissivity.
- HEALTHIER AND CLEANER AIR There are no convective motions and consequent raise of dust, keeping the air healthy and clean.
- COMFORT TO CURRENT STANDARDS Our long experience stretching back over thirty years of activity, added to our participation in work groups specifying standards for products, make Fraccaro an ideal partner in this specific sector of heating technology.
- EASY, RAPID INSTALLATION thanks to an easy assembling procedure and installation on the ceiling with chains.
- NO FLOOR OR WALL SPACE IS REQUIRED as our GIRAD Radiant modules are installed on the ceiling.
- NO DANGER OF FROST as the lack of carrying fluids, such as hot water or steam, makes it possible to shut down the system for long periods without any unfortunate consequences.
- UNIFORM TEMPERATURE the heat produced by radiation from Radiant Tubes achieves temperature uniformity on the horizontal plane of the building better than any conventional heating system.
- HIGHLY ECOLOGICAL as it allows for fuel saving, with great combustion performance and very low emissions of pollutants.
- MODULAR DESIGN i.e. for large surfaces more than one units are to be installed.
- MODULATING OPERATION of generators, so as to control the radiating heat emission according to the external temperature.
- NO AIR STRATIFICATION or rather no warm air shall accumulate in the high areas of the room being heated; on the contrary, as far as the air goes upwards, the air temperature itself decreases.
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- RAPID WARM-UP due to lack of intermediate fluids requiring heating.
- CONFORM TO CURRENT STANDARDS Our long experience stretching back over thirty years of activity, added to our participation in work groups specifying standards for products, make Fraccaro an ideal partner in this specific sector of heating technology.
Pre-assembled modules
Completion Modules
The load-bearing structure is made of pressed galvanized steel, ensuring superior thermodynamic stability over time for all materials composing the radiant ribbon. The frame allows the system to be secured with a larger fixing pitch compared to the standard version.
The Fraccaro ceiling radiant tube modules consist of one or two emitting tubes with diameter Ø200 mm, Ø300 mm, Ø355 mm, a solid support frame, 3 insulating panels, and 2 side flashing for containment and closure. The expansion joints necessary to compensate for thermal expansion of the circuits are supplied pre-installed in the modules. Each module is pre-assembled at the factory and certified for simple and rapid installation. The tubes can operate independently from the support structure ensuring extremely long service life. Standard lengths are 6 meters but shorter modules can be manufactured upon request.
Flanged joint
The tube-to-tube connections are high-seal flanged type. This innovative solution allows extremely rapid installation without the use of silicone.
Energy saving
Guaranteed energy savings of up to 30% and superior indoor comfort control: these are the findings of Prof. Renato Lazzarin and Prof. Marco Noro from the University of Padua’s Department of Management and Engineering. Their research demonstrates that Girad Fraccaro condensing radiant strips are the most advantageous solution compared to other heating systems.
Furthermore, the report issued by the University of Padua shows that these savings can be even higher in older buildings (lacking thermal insulation) or with heights exceeding 8 meters. This is specifically due to the inherent heat exchange characteristics of Girad radiant strips compared to air-based systems, especially when replacing the latter with the former.
An excellent result which—through the Trnsys rel. 17 dynamic simulation software and numerous tests conducted across various buildings over an entire winter season—once again provides scientific confirmation of the advantages of Fraccaro’s ceiling radiant heating.
Thanks to the University of Padua for this important collaboration in the research and development of Fraccaro systems.
The Girad range of heat generators
