Hearth and Home Technologies RUTHERFORD-50 owner manual B. House Style Shroud

•Field-fabricated spacers (1/2 in./13 mm tall, 24 ga/.024 in. galvanized steel) must be used to support the chase top flashing or chase pan, in order to provide air flow.

•14 in. (345 mm) DuraChimney II pipe must extend at least 6 in. (152 mm) above the chase pan/flashing.

•A DuraChimney II cap must be used inside the shroud.

•The shroud must not be in direct contact with any of the DuraChimney II components (other than the chase top flashing).

•All open areas of the shroud must be covered with 1/2 in. (13 mm) stainless or galvanized steel mesh screen to prevent debris from entering the shroud.

•Shrouds must follow the dimensional requirements specified in Tables 10.1, 10.2 or 10.3, depending on the syle of shroud used. The three basic shroud styles are a) House, b) Arch or Mailbox, and 3) Pyramid. Most factory- fabricated shrouds will fall under one of these basic style categories.

B. House Style Shroud

The house-style shroud is roughly square or rectangu- lar with a closed top and exhaust openings on four sides (Figure 10.2). Table 10.1 lists the minimum shroud d9imen- sions, the minimum open area per side, and the minimum total open area for the shroud.

Table 10.1

House Style Shroud Minimum Dimensions

Chimney										Min Open Area	Min Total Open
Diameter		Chimney Area		Min Height H		Min Length L		Min Width W		per side	Area
in	mm	in	mm	in	mm	in	mm	in	mm	sq in	sq in
14	355.6	154	3911.6	24	609.6	32	812.8	32	812.8	260	1040

H: Minimum height of shroud

L: Minimum length of shroud

W: Minimum width of shroud

H

		Shaded area represents screened open area. Actual
W	L	shape of shroud may vary as long as minimum dimen-
		sions and minimum open area requirements are met.

Figure 10.2 House-Style Shroud Minmum Dimensions

Heat & Glo • RUTHERFORD-50 • 4059-333 Rev F • 11/08 33