Schwank ATH Brooder/Agricultural Series - Manual (Page 14)

GP-MATH-BX-10A
ATH / IA Manual
RD: Nov, 2005
RL: 10
KH
Page 10
FIGURE 8 FLUE VENT
The total maximum allowable length of vent and combustion air duct is 80' for ATH 130, and
50' for ATH 110, 80, 60, and 45. Neither the flue vent or combustion air duct is to exceed 50'.
The total maximum vent allowable is reduced by ten feet for every 90
o
vent elbow installed.
Should the system be installed with a 90
o
elbow in the radiant tube, 10' of vent pipe must be de-
ducted from the maximum length respectively.
Lengths greater than those allowed may have condensation problems and will void CSA design
Certification. The horizontal flue vent shall not terminate less than the following distances:
• Three feet above grade level
• Twelve inches from combustion air inlet of any heater with input up to 100,000 BTU
• Three feet from combustion air inlet of any heater over 100,000 BTU
• Directly above a gas utility meter or service regulator
• Directly below soffit or over hang
Two heaters may be vented through an approved common 4" X 4" X 6" flue Tee, supplied by
the manufacturer, as an option. The two heaters must be controlled by one common thermostat
or "ON/OFF" switch.
• All vent pipe used with a slip-fit connection must be mechanically secured. Where the vent
pipe passes through areas where the ambient temperature is likely to produce condensation
of the flue gases, the vent pipe shall be insulated. The vent system must be adequately sup-
ported to prevent sagging.
PLEASE SEE SECTION 12: HEATER EXPANSION (PAGE 13).