Roberts Gorden CRV-B-2 Manual Do Utilizador

4 

Space heating can be accomplished with less input 
capacity when a radiant heating system is utilized, 
rather than with a conventional convective heating 
system. Why is this so?

A conventional, convective heating system, such as a 
unit heater or central furnace works by heating the air, 
which then indirectly heats the area and 
occupants. CRV-Series utilizes infrared energy to heat 
objects, people and surfaces directly, not the air. The 
warm objects and floor create a heat reservoir, which 
then re-radiates to the surroundings and also heats 
the air by convection.

The radiant energy received by the occupants, directly 
from the heater or indirectly from the 
surroundings via re-radiation, serves to increase the 
mean radiant temperature (MRT) of the space. In a 
manner similar to direct sunlight, the increased MRT 
allows the occupant to perceive a comfort condition at 
a reduced air temperature. The resulting reduced air 
temperature within the space provides the 
following fuel-saving advantages:

• Reduced stratification of air in the space.

• Reduced transmission heat loss due to lower tem-

perature inside than assumed design 
condition.

• Reduced air change heat loss, to the extent that 

exfiltration through cracks or openings near the 
roof will be decreased because of decreased 
stack effect. 

• Decreases the actual degree days experienced.