HearthStone Waitsfield DX 8770 Owner's Manual page 16

Hearthstone Quality Home Heating Products, Inc
Figure 11 - Acceptable Direct Vent Terminal Vent Cap Locations
A = Clearance above grade, veranda, porch, deck,
or balcony: 12 inches (30cm) minimum.
B = Clearance to window or door that may be
opened: **Min. 9 inches U.S./*12 inches (30cm)
CAN. We recommend 12 in, minimum to prevent
condensation on the window.
C = Clearance to permanently closed window:
**Min. 9 inches, U.S./*12 inches (30cm) CAN.
We recommend 12 in. minimum to prevent
condensation on the window.
D = Vertical clearance to ventilated soffit located
above the termination within a horizontal distance of
2 feet (60cm) from the center line of the termination:
18 inches (46cm) minimum.
E = Clearances to unventilated soffit: 12 inches
(30cm) minimum.
F = Clearance to outside corner: **Min. 9 inches,
U.S./12 inches (30cm) CAN. We strongly
recommend 12 inches, particularly where windy
conditions prevail.
G = Clearance to inside corner: **Min. 6 inches,
U.S./12 inches (30cm) CAN. We strongly
recommend 12 inches, particularly where strong
winds prevail.
H = *Not to be installed within 15 feet (4.5m) above
a meter/regulator assembly within 3 feet (91cm)
horizontally from the center line of the regulator.
I = Clearance to service regulator vent: 3 feet
(91cm)
J = Clearance to non-mechanical air supply inlet to
building or the combustion air inlet to any other
appliance: 12inches (30cm) minimum.
K = Clearance to a mechanical air supply inlet:
**Min. 3 feet (91cm) above if within 10 feet
horizontally, U.S./*6 feet (1.83m) CAN minimum.
L = ¹Clearance above paved sidewalk or a paved
driveway located on public property: 7 feet (2.1m)
minimum.
M = ²Clearance under veranda, porch, deck, or
balcony: 12 inches (30cm) minimum.
*In accordance with CSA B149 Installation codes.
**In accordance with the current ANSI Z223.1/NFPA 54,
National Fuel Gas Code. Note: Local Codes and
Regulations may require different clearances.
¹A vent shall not terminate directly above a sidewalk or
driveway which is located between two single family
dwellings and serves both dwellings
²Only permitted if veranda, porch, deck or balcony, is fully
open on a minimum of two sides beneath the floor.*
WAITSFIELD Model 8770
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