Direct Fired Heating – The Standard in Heating

For over thirty-nine (39) years Rupp Air Management Systems has used Direct-Fired make-up air heaters in tens of thousands of industrial and commercial applications.

Every Rupp direct-fired heater is designed and tested to produce the highest level of efficiency, safety, and comfort for years of operation. Direct-fired heating refers to heating equipment that burns gas directly in the fresh air stream resulting in the most efficient method of heat transfer. Direct-fired heaters generate the lowest cost per BTU of heating when compared to indirect-fired and electric strip heaters. Rupp direct-fired units are also a lower up front capital expense in comparison to other heat sources, and also lower cost to install due to no exhaust flues as required on indirect-fired units. Direct-fired heaters are well suited and widely accepted for applications such as commercial kitchens, service garages, transit facilities, factories, warehouses and paint-booths.

Below are listed some of the major benefits for using direct-fired heating:

1. Direct-fired heating is a 92% efficient heating process. This will result in a very quick capital payback and heating savings for many years. This is in comparison to indirect-fired heating equipment which is typically 70% thermally efficient.
    
2. Direct-fired heating is environmentally clean. Recently, all manufactures of agency listed direct-fired heating equipment were required to certify to the new harmonized ANSI Z83.4a-2001/CSA 3.7a-2001 safety standard. This standard allows for a maximum of 5 ppm CO and .5 ppm NO2 generated by the heating equipment.
    
3. Direct-fired heater burners can operate on either natural or LP gas and achieve very high temperature rises. In fact, the Rupp line of direct fired heaters can heat the incoming air 125°F up to a maximum discharge temperature of 160°F.
    
4. Every Rupp direct-fired heater incorporates intelligent flame monitoring equipment. This equipment ensures that the airflow through the burner and gas flow to the burner are optimized to produce the most efficient and clean combustion process.
    
5. Rupp direct-fired heater burners are fully modulating and constantly adjusting to changing outdoor air conditions. Gas flow is automatically adjusted to compensate for changes in outdoor air temperature. When the outdoor air is warm, there is a reduction in gas usage.
    
6. Direct-fired systems are a long lasting heat source unlike indirect-fired systems that use a heat exchanger that can break down and needs to be replaced over time. The direct- fired systems are easy to maintain for many years of operation.
    

Based on the facts provided above, we hope you understand the benefits of using direct-fired heated make-up air. Direct-fired heating offers you and your customers' a long term, safe and economical heating solution.