Exhaust ___ Direct Vent ___ B-Vent ___ Z-Vent ___ Pipe Lines ___ Flue

The proper venting Materials and procedure for the venting of the Natural Rise Power Gas Series are as followed :

The preferred material for these heaters is B-Vent which means : doubled walled, galvanized metal outside, polished aluminum inside.
The GA5 and GA10 both require 4” venting and the GA16 requires 5”, but the supplied adapter may be used to go up to 6” (Never reduce in size).

You must establish an 18” collar rise before installing any bends or condensation catches.
Never install a 90 degree bend directly on top of the heater.

The minimum height allowed is 6 feet, this is to allow enough pipe to heat up to properly vent the gases and moisture from combustion.
A straight vertical run is preferable.

IF horizontal runs are necessary then they must always be sloped up at least .25” for every foot and must be kept shorter than 75% of the total vertical length.
Never terminate the venting horizontally, you need the last bit of vertical run to “pull” the remaining gasses that may have cooled in the horizontal run.
Many municipalities require a “chase” to be added up to the roof line for any venting running up an exterior side wall of a structure.
Please check local guidelines.

IF venting through the roof then the termination height will depend on your roof pitch.
IF condensation is a concern for a specific installation then other more specialized materials should be used most common is Z-Vent (double walled stainless steel on both in and outside layers).

IF there are any deviations from these guidelines then please seek the help of a qualified HVAC technician.
Improper venting is risky, could be hazardous, dangerous.

Question: What size is the Flue pipe on the power natural gas and propane units and do they come with a through the wall kit?
ANSWER: The vent pipe for the gas tankless units is 4 inches. ALL units come with a Stainless Steel Chimney adapter piece.