April 23, 1999
Page 10
COMBUSTION AIR
All fuel burning equipment requires an adequate supply of air for combustion. A sufficient
quantity of air must enter the heated space to replace that exhausted by the Heater.
Modern buildings greatly reduce the amount of air entering the heated space through improved
construction techniques. As well exhaust fans may create a negative pressure in the heated
space. Follow CAN1-B149 Code, latest addition, and any local codes to provide enough air for
combustion, ventilation and proper venting. Clearances must be maintained at all times from the
louvred front panel openings.
GAS INSTALLATION
Installation must be made in accordance with the requirements of the authorities having
jurisdiction.
1) Carefully check the unit name plate for the fuel type, supply pressure, input rating and
temperature rise.
2) Gas supply pressure higher than the unit name plate requires an additional field supplied gas
regulator. The standard unit name plate is 7" WC (1.75 kPa).
