New Buck Corporation 74 - Manual (Page 15)

Step (b): Calculate R of proposed system. 4” brick of C=1.25, therefore Rbrick = 1/C = 1/1.25
=0.80 1/8” mineral board of K = 0.29, therefore Rmin.bd. =1/029 x0.125 = 0.431
Step (c): Compare proposed system R of 1.231 to specified R of 0.893. Since proposed
system R is greater than required , the system is acceptable.
Definitions:
Thermal conductance = C = Btu = W
(hr)(ft²)(°F) (m²)(°K)
Thermal conductance = K = (Btu)(inch) = W = (Btu)
(hr)(ft²)(°f) (m)(°K) (hr)(tf)(°F)
Thermal conductance = R = (ft²)(hr)(°F) = (m²)(°K)
Btu W
Install in accordance with 24 CFR, Part 3280 (HUD).
CAUTION
SPECIAL METHODS ARE REQUIRED WHEN PASSING THROUGH A
WALL OR CEILING. SEE INSTRUCTIONS AND BUILDING CODES.
“DO
NOT CONNECT THIS UNIT TO A CHIMNEY FLUE SERVING
ANOTHER APPLIANCE.”
DETERMINING THE CHIMNEY LOCATION
A. CEILING EXIT (USING SINGLE WALL (minimum 24ga.) pipe and 2100° UL 103 HT type
chimney system listed with manufacturer in this section of manual.) (See Page 12.)
1. Suspend a plumb bob from the ceiling above the unit so that the weight is hanging in
the center of the flue exit. (A small weight on a string will serve as a plumb bob.)
Mark the ceiling where the string is suspended to locate the center of the chimney.
2. After locating the center of the hole, install the ceiling support box, chimney flashing
and rain cap per the chimney manufacturer’s instructions.
Now connect the stove and ceiling support box using #24 ga. minimum blue or black steel
connector pipe (DO NOT USE GALVANIZED PIPE). Connect each section so the
crimped end faces downward, and secure each section to each other using at least
three (3) sheet metal screws or rivets. Also use three (3) sheet metal screws to fasten pipe to
collar on heater. (See Figure 5. Page 14.)
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