The B10/SG Direct Vent Systems must be installed where provisions do not exist for the ducting of
combustion by products to the outside.
The direct vent connector shall not pass through any floor or ceiling.
The burner exhaust must be ducted directly to the vent hood through listed exhaust pipes provided. The exhaust
pipe throughout it's entire length must be readily accessible for inspection, cleaning and replacement.
The venting system should be installed and supported in accordance with the National Fuel Gas Code, ANSI
Z223.1, CAN/CGA B149 or in accordance with any local codes.
The Exhaust Kit consists of:
Installation of DVH Exhaust:
1. Begin by locating a suitable location for the exhaust to breech the wall. This location should be at least 12”
above ground level or the expected snow level, and on the leeward side of the house. Consult page 6 for
required distances from windows, doors, etc.. The hood location must also allow for a upward slope of a 1/4”
per foot for the exhaust piping.
2. Once the hood location has been determined, cut a 7 1/2” hole through the wall for the vent terminal. Using
2” X 2”, Frame a box around the hole on the outside of the house so the flange is mounted away from the
siding. Attach the hood to the outside of the house using appropriate screws to support the hood. Use one
screw through each of the predrilled holes on the trim plate of the hood. Do not drill or screw through the
hood at all.
3. Once the hood is secure, mock up the rest of the vent kit. First put the stainless steel elbow on the hood, then
install the stainless steel flex pipe between the elbow and the reducer on the breeching of the boiler. Be sure
that there is always an upward slope of at least 1/4” per foot of the vent pipe. If at any point the vent pipe is
not able to support itself it should be supported from the ceiling.
4. Once you are satisfied with the fit of the exhaust, seal each joint inside and out with high temperature silicone.
Secure each joint with three screws and seal the screws as well.
5. When installation is complete, inspect each joint and apply more sealant to any possible leaks.
DVH-5 System
1 - 6” to 5” Z-Vent Reducer
1 - 5” x 8’ Length of stainless flex pipe
1 - 5” 90 degree elbow
1 - 5” Concentric exhaust
2.1 Exhaust Pipe System
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