- What are some of the standard features for all indirect gas fired heaters?
Spark ignition, power vented flues, aluminized steel heat exchanger, directional air intake louvers.
- What are the standard gas pipe connections for all indirect gas fired heaters? Are these sizes also the gas supply sizes to each heater?
The gas pipe connections are available in ½ or ¾ depending on the heater size. The maximum PSIG of gas heaters = ‡ pound OR 14" of water column.
- What is the minimum space (in inches) between the sheet metal duct transition and the indirect gas fired heater and what is the purpose for this space?
The minimum of one inch is to comply with the National Fuel Gas Code (NFGC). The minimum of one (1') inch also provides a by-pass which prevents the gas-fired heater from creating a negative pressure on the air curtain fans.
- Why is the sheet metal transition for all indirect gas fired systems tapered (wider at the heater than at the intake to the air curtain)?
To locate the bottom of the heater level with the bottom of the air curtain (heater dimension is taller than the air curtain).
- Where is the location of the access panels on all duct transitions? What material are the access panels constructed of and are the access panels painted?
The access panels are located on the bottom of the duct transition. They are constructed of aluminized steel and they are not painted.
- What is the maximum recommended length of flue pipe for a single flue on any indirect gas fired heater? A 90 degree elbow is equivalent to how many feet of flue pipe?
A flue should not be longer than fifty (50') feet per AGA Code. A 90ƒ elbow is equivalent to 15' of flue pipe.
- What is the largest BTU/hr heater available for any indirect gas fired heater?
400 BTU's.
