Munchkin HIGH EFFICIENCY HEATER with the "925" Controller - Manual (Page 16)

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may require venting modifications (consult factory). The air inlet must be a minimum of 1'
vertically above the maximum snow level. It is very important that there are no other vents,
chimneys or air inlets in any direction for at least 4'.
All venting must be properly supported. The Munchkin is not intended to support any venting
whatsoever. All piping, glue, solvents, cleaners, fittings and components, must conform to ASTM
(American Society for Testing and Materials), and ANSI (American National Standards Institute). It is
recommended that you use one of the optional vent kits specifically designed for Munchkin installa-
tions, available from Heat Transfer Products, Inc. (KGAVT0601CVT [3 in.], KGAVT0501CVT [2 in.] or
V500 for the T50M/T80M or V1000 for the 80M/140M/199M). NOTE: When using the KGAVT601CVT
KIT, REMOVE THE 2 SCREENS FROM THE PROVIDED INLET TEE AND INSTALL THEM IN THE INLET
SOCKET AND OUTLET SOCKET (Y TEE CONNECTION) OF THE KIT PRIOR TO INSTALLING THE
SCHEDULE 40 PIPE AND GLUING.
VENTING
12 in.minimum
Forced air
inlet
Grade
3 ft.minimum
Less
than 10 ft.
terminal
(see 10.8.1)*
draft vent
Mechanical
C
12 in.minimum
Direct vent terminal clearance
Minimum clearance, C
Input (Btu/hr)
4 ft.minimum
12 in.minimum
minimum
vent terminal
Mechanical draft
(see 10.8.2)*
4 ft.
Clearance (in.)
10,000 or less
10,001 to 50,000
Over 50,000
(see 10.8.3)*
6
9
12
For SI units: 1 ft = 0.305 m; 1 in. = 25.4 mm;
1 Btu/hr = 0.293 W
EXIT TERMINALS OF MECHANICAL DRAFT
AND DIRECT-VENT VENTING SYSTEM
* REFERENCE: THE NATIONAL FUEL GAS CODE
2002 EDITION
CAUTION
Flue Gas will condense as it exits the vent termination. This condensate can freeze on
exterior building surfaces which may cause discoloration of these surfaces.
Consideration should be given to the plume of condensation that exits the exhaust
which may affect the cosmetic appearance of the building.