1361 Calle Avanzado, San Clemente, CA 92673, Phone 949.259-4000 Fax 949.276-5500 www.greenrvproducts.com
TANKLESS WATER HEATER Model GSWH-1
INSTALLATION MANUAL ADDENDUM for after Market Installations
REPLACEMENT OF AN ATWOOD 6 GA. UNIT
DOOR/FLANGE ASSEMBLY - Part #1GWHDA6
Fig. 1
The existing cut out for a 6 gal Atwood water heater measures 16 1/4” (W) by 12 5/8” (H).
The cut out needed for your GSWH-1 is only 12 ¾” by 12 ¾” and its flange MUST be supported on all
sides by a wooden frame so that it may be mounted rigidly with #8 ¾” flat head screws.
The flange will fit vertically into the existing opening, but a horizontal gap of 3 ½” will be left between
the new flange and the side of the opening.
A properly cut piece of 2” by 2” must be added as a vertical brace located at 12 ¾” from the right edge
of the cut out. (See Fig. 1)
Please refer to the Owner’s Manual for information on how to complete the installation.
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