Enviro EF3 用户手册

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become hot enough to cause burns if touched by children. Non-combustible shielding or guards may be required.

3.  Termination must exhaust above the inlet elevation. It is recommended that at least five feet of vertical pipe 

be installed outside when the appliance is vented directly through a wall, to create some natural draft to prevent 

the possibility of smoke or odor during appliance shut down or power failure. This will keep exhaust from causing 

a nuisance or hazard from exposing people or shrubs to high temperatures. In any case, the safest and preferred 

venting method is to extend the vent through the roof vertically.

4.  Distance from the bottom of the termination and grade is 12” (30 cm) minimum. This is conditional upon the 

plants and nature of grade surface. The exhaust gases are hot enough to ignite grass, plants and shrubs located in 

the vicinity of termination. The grade surface must not be lawn.

5.  If the unit is incorrectly vented or the air to fuel mixture is out of balance, a slight discoloration of the exterior 

of the house might occur. Since these factors are beyond the control of Sherwood Industries Ltd, we grant no 

guarantee against such incidents.

6. When installing an FPI the chimney must be fully lined. Unless the chimney’s inside diameter is less than 6” 

(15 cm) around or has a cross section area of 28 inches² (180.6 cm²), we strongly recommend lining all masonry 
chimneys.

Installation

A

24 in (61 cm)

Above grass, top of plants, wood, or any other combustible materials.

B

48 in  (122 cm) 

From beside/below any door or window that may be opened.

C

24 in (61 cm)

From above any door or window that may be opened.

D

24 in (61 cm)

To any adjacent building, fences and protruding parts of the structure.

E

24 in (61 cm)

Below any eave or roof overhang

F

12 in (30 cm)

To outside corner.

G

12 in (30 cm)

To inside corner, combustible wall (vertical and horizontal terminations).

H

3 ft (91 cm) within a height of 15 ft (4.5 

m) above the meter/regulator assembly

To each side of center line extended above natural gas or propane meter/regulator assembly or 

mechanical vent.

I

3 ft (91 cm)

From any forced air intake of other appliance

J

12 in (30 cm)

Clearance to non-mechanical air supply inlet to building, or the combustion air inlet to any appliance.

K

24 in (61 cm)

Clearance above roof line for vertical terminations.

L

7 ft (2.13 m)

Clearance above paved sidewalk or paved driveway located on public property.

Air Supply Inlet

Gas Meter

Restriction Zone

(Termination not allowed)

Termination Cap

G

G

Opens

Opens

Opens

D

F

B

B

A

I

H

K

G

G

L

C

E

1.  Do not terminate the 

vent  in  any  enclosed 

or  semi-enclosed  areas 

such  as  a  carport, 

garage, attic, crawlspace, 

narrow  walkway,  closely 

fenced  area,  under  a 

sundeck or porch, or any 

location  that  can  build 

up  a  concentration  of 

fumes such as stairwells, 

covered  breezeway,  etc.

2.    Vent  surfaces  can