SECTION 1: CONCEPT
SECTION 1: CONCEPT
The concept of CRV-Series is easy to understand.
However, it means discarding old ideas because CRV-
Series is a different kind of heating system.
CRV-Series is a gas-fired, vacuum-operated, low- intensity infrared heating system incorporating a pat- ented incremental burner system.
Gas-Firedmeans it uses clean-burning Natural or
Propane gas.
Vacuum-Operatedmeans that the pump draws all the products of combustion through the system and expels them outdoors.
Low-Intensitymeans the radiant surfaces of the
tubes do not glow red; instead they operate at a lower temperature (less than 900° F or 482.2° C) and radiate heat at lower intensity per square foot of radiating sur- face. Area coverage is provided by long runs of 4" (10 cm) O.D. tubing which hang from the ceiling or roof supports. Reflectors direct the radiant heat downward to occupied areas.
Radiant refers to the heat radiated by the CRV-Series system. Because this heat is in the form of infrared rays, it does not directly heat the air. Instead, the rays heat objects such as floors, people, walls, cars, machines, tools, etc. The warm objects, in turn, heat the air through convection.
Incremental Burner System means that several burners can operate in-series and fire into the same run of steel tube that carries the combustion gases from upstream burners. Each of these burners in a radiant branch may have different firing rates; also, the space between burners may vary. This allows the designer to match heat gain to heat loss for each area of the building. Firing burners in-series provides higher thermal and radiant efficiency.
In a properly designed low-intensity radiant system, the occupants should be barely aware of the radiant heat when the system is firing. They will feel little or no change when the thermostat is satisfied and the sys- tem is not firing. This combines with warm floors, warm walls and draft-free operation to improve the mean radiant temperature of the space. This is the key to the exceptional comfort and fuel efficiency provided by the CRV-Series system.
