Marco C 36 HC Installing & Operating Manual page 12

IAL GAIN CHART
MARCO's Double-Wall Chimney System, when used on
the Classic 36" fireplace is listed for installation to a max-
imum of 60 feet high. This measurement includes the
fireplace, chimney sections and the effective height of the
termination assembly. The minimum height of the fireplace
system must not be less than 15 feet including the
fireplace, chimney sections, and termination assembly.
The minimum height with 2 elbows (1 set) is 15 feet. The
minimum height with 4 elbows (2 sets) is 24 feet.
The recommended minimum height of the chimney system
(15 ft) is based on the wind and pressure conditions usually
found around the average homesite. Unusual conditions
such as adjacent hills, tall trees, high wind areas, etc. can
cause downdrafts to occur in any chimney system and
would therefore require an extra length of pipe to ensure
the proper draft conditions during the use of the fireplace.
Consult your supplier or the local building inspector for
any information they may have regarding local weather
characteristics.