Venting System; General; Recommendations; Equivalent Vent Length (Evl) - Drolet Eco-65 Installation And Operation Manual

Eco-65 Installation and Operation Manual

4 Venting system

4.1 General

Even though the chimney draft is mechanical, a suitable venting system will ensure a natural
draft which will prevent smoke spillage in your home if a power outage occurs. Moreover, a
suitable venting system configuration will help getting the best efficiency out of your stove
when installed in accordance with the required EVL (see Section 4.3: Equivalent Vent
Length (EVL)).
Even the best stove will not function safely and efficiently as intended if it is not connected to
a suitable venting system.

4.2 Recommendations

In Canada, we recommend that you use a listed pellet vent that meets the CAN/ULC S609 or
ULC/ORD C441 Standard. A pellet vent listed to ULC S629M is also suitable for installation
with this stove.
For the United States, we recommend that you use a listed pellet vent that meets the UL 641
Standard. A pellet vent listed to UL 103 is also suitable for installation with this stove.
This stove can be vented in an existing factory-built or masonry chimney with the addition of
a stainless steel liner, provided the chimney is more than 4" in diameter. The liner should be
listed and should meet the ULC S635 CAN/ULC S640 standard in Canada and the UL 1777
standard in the USA. Refer to the instructions provided by the vent manufacturer, especially
when passing through a wall, ceiling or roof.

4.3 Equivalent Vent Length (EVL)

Recommended venting system inner pipe diameter is 4".
To calculate the EVL of your installation, use the following conversions:
NOTE: Horizontal runs shall not exceed 9 feet.
NOTE: Never exceed 30 feet of EVL.
Here is an example to help you calculate Equivalent Vent Length. On the following figure the
EVL can be calculated like this:
14
Qty Type of pipe
1 90° elbow or "T"
1 45° elbow
1 ft Horizontal pipe run
1 ft Vertical pipe run
EVL
equivalent(ft)
5
3
1
0.5