10
DRISTEEM GTS HUMIDIFIER INSTALLATION AND OPERATION MANUAL
The GTS humidifi er supports both room air and sealed combustion.
• Do not install the humidifi er in a dusty environment.
• When the GTS humidifi er is installed in an environment with negative pressure or toxic air, it must have sealed
combustion.
ROOM AIR COMBUSTION
WARNING
Air for combustion:
Air for combustion must not be contaminated by halogen compounds, which include fl uoride, chloride, bromide,
and iodide. These elements are found in aerosol sprays, detergents, bleaches, cleaning solvents, salts, air
fresheners, and other household products.
Failure to follow these instructions could cause severe bodily injury or death.
• All fuel-burning equipment must be supplied with air for combustion. Suffi cient air must be provided to ensure there
is not a negative pressure in the equipment room or space.
• Do not block or obstruct air openings on the appliance, spaces around the appliance, or air openings to the
appliance area.
• Do not block the fl ow of combustion and ventilation air. To provide necessary oxygen for proper combustion,
openings must be provided to allow outside air to enter the space where the humidifi er is located. Enclosed spaces,
such as equipment rooms, must be vented for combustion air. The size of air openings must be based on all gas-
burning equipment installed in the space. Table 10-1 outlines four types of locations, and the requirements of each.
Combustion and ventilation air
Table 10-1:
Location of humidifier and required air openings
Location description
Required air opening
Confi ned space with all air from inside the building; conventional frame, brick or
stone construction with normal infi ltration
Note:
this location rarely provides enough air for higher-capacity humidifi ers.
Two openings, 6.5 cm
2
per opening per 293 W input
The minimum free area of all openings combined is 645 cm
2
.
Confi ned space with all air from outside the building through air ducts
Two openings, 2 ducts, 6.5 cm
2
per opening per 586 W
input*
Confi ned space with all air from outside the building from through-wall openings
only (no ducts)
Two openings, 6.5 cm
2
per opening per 1172 W input*
Unconfi ned space with all air from outside the building
Same as confi ned space; all air from outside the building
* The minimum dimension of any opening is 76 mm × 76 mm.