HRG Series 

Optional Features

• Piping enclosures, insulated and weather proofed for outdoor installations
• Pipe insulation
• Exhaust coil wash-down plenum and drain pan
• Steel tube, aluminum fin coil
• Special dimensions and configurations

Where should HRG Series be used?

1. Commercial and industrial buildings, where exhaust and makeup are required for many hours of the year, the more hours the better.
2. In installations where exhaust air temperatures are from 80°F to 200°F and where the air is not particularly corrosive. Exhaust air temperatures below 80°F tend not to be an economic source of heat, particularly where outdoor air temperatures are sub zero, and the possibility of circulating glycol at temperatures below 32°F exists, thus creating certain frosting conditions on the exhaust coil, which is a dehumidifying coil. While the control system can automatically prevent frost from forming, the efficiency of the system is low while operating in a “frost prevention” mode and energy savings may be less than anticipated.
3. Areas of the country where the normal energy source is relatively expensive will be attractive for heat reclaim systems: the relative cost of energy seems to be rising at an alarming rate throughout all of Canada, so few areas will not find the reclaim of heat a wise economic move.

Why a HRG Series System instead of an Air to Air System?

The reclaim of heat, as developed so far, while saving heating energy, does demand the expenditure of energy in another form; fan motor horsepower to overcome the reclaim device air pressure drop. A glycol run around system requires about the same amount of extra energy to run the two fans and one pump, than an air to air system does for its two fans. However, in the glycol system, the pump may be shut off at a point when it is determined that heating savings no longer outweigh the cost for pump power.