The following pages will provide valuable assistance with regard to understanding the Heat Exchange Modules supplied by Garfield Richards Engineering Co.

• Typical Heat Exchanger Specifications and Descriptions
  This information includes descriptions and explanations of both gas fired and gas/oil fired heat exchanger modules.
• Technical Data for ‘GT’ and ‘GR’ Models
  This section includes the physical dimensions and technical characteristics of the GRE GT model and GRE GR model heat exchangers.
• Technical Data for ‘GTF’ Models
  This section includes the physical dimensions and technical characteristics of the GRE GTF model which differs from the other models in a few ways.
• Airflow Resistance Graphs
  The resistance to the airflow varies depending on the heat exchanger model. These graphs help identify this resistance.