Confined Space Installation - State Water Heaters Premier Use And Care Manual

Confined Space Installation

The heat pump water heaters covered in this manual require a minimum of 750 cubic feet of installation space. When a space
meeting this minimum requirement is not available these units may be installed in spaces with less than 750 cubic feet (confined
spaces) when provisions are made by installing an accessory Outlet Duct Kit and/or louvered grills as described in this section.
Inlet air will be derived from an alternate location inside the building structure through one or more louvered grills or through a fully
louvered door leading into the confined space. The alternate location from where inlet air will be derived must provide a minimum of
750 cubic feet of space when using this installation method. When the Outlet Duct Kit is installed outlet air from the unit is redirected
to an alternate location. The alternate location to where outlet air will be redirected must also provide a minimum of 750 cubic feet
of space.
Other configurations are possible when using the Outlet Duct Kit (PN 9910006000) and/or the Inlet Duct Kit (PN 9910005000) with
these water heaters. Consult the installation instructions included with the duct kits for additional information. These instructions
are also available on the manufacturer's web site. Contact the distributor where the water heater was purchased for information on
ordering these duct kits.
AIR FLOW
LOUVERED
GRILLS
MINIMUM
16" X 24"
AIR FLOW
AIR FLOW
CONFINED
SPACE
FIGURE 4
EXTEND DUCT
ABOVE INSULATION
IN ATTIC SPACES
BOOT/COLLAR
8 INCH
FLEXIBLE
DUCT
OUTLET DUCT
KIT ADAPTER
DUCT
TERMINATION
OR GRILL
AIR FLOW
5