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14
VENTING
Required: 4 Pcs. 4" 90 degree elbow (4 x 5 = 20 Equivalent Feet) = 20 Equivalent Feet
Required: 20' of 6" Plastic PVC Pipe (20 x 1 = 20 Equivalent Feet) = 20 Equivalent Feet
Total Friction Loss in Equivalent Feet (20 + 20 = 40 Equivalent Feet) = 40 Equivalent Feet
C. LONGER VENT RUNS USING A COMBINATION 4" TO 6" PIPE
The connection of air inlet and exhaust vent at the heater must remain 4" and each vent must extend
from the heater a minimum of 15 equivalent feet before transitioning to a 6" vent. The overall
extended maximum length of pipe on the inlet exhaust combined, must not exceed 125 equivalent
feet. Listed below are the 4" and 6" size equivalent table.
Fittings or Piping Equivalent Feet
4" or 6" 90 degree elbow = 5
4" or 6" 45 degree elbow = 3
4" or 6" Coupling = 0
4" or 6" air inlet tee = 0
4" or 6" Plastic Pipe = 1
4" or 6" V2000 Vent Kit = 0
Example: Installation requires the following material for both the inlet and exhaust piping when
extending the vent run for the Munchkin.
Requirements for 4" Venting
2 Pcs. – 4" 90 degree elbow (2 x 5 = 10 Equivalent Feet) = 10 Equivalent Feet
20' of 4" Plastic PVC Pipe (20 x 1 = 20 Equivalent Feet) = 20 Equivalent Feet
Total of 4" Equivalent Piping with Fittings = 30 Equivalent Feet
Requirements for 6" Venting
6 Pcs. – 6" 90 degree elbows (6 x 5 = 30 Equivalent Feet) = 30 Equivalent Feet
4 Pcs. – 6" 45 degree elbows (4 x 3 = 12 Equivalent Feet) = 12 Equivalent Feet
40' of 6" Plastic PVC Pipe (40 x 1 = 40 Equivalent Feet) = 40 Equivalent Feet
Total of 6" Equivalent Piping with Fittings = 82 Equivalent Feet
Total Friction Loss in Equivalent Feet for both 4" and 6" (30 + 82 = 112
Equivalent Feet) = 112 Equivalent Feet
CAUTION
Do not exceed the 85 foot maximum requirement for 4" PVC and the 125 foot
maximum requirement for 6" PVC (intake plus exhaust piping added together)
including fitting allowance shown in friction loss equivalent table on previous page.
CAUTION
Transitioning from 4" to 6" should be done in the Vertical position to avoid
condensation blockage. If done in the horizontal position check to make sure
condensation blockage will not occur.
DANGER
The Munchkin is not intended to be common vented with any other
existing appliance!