HWAM Autopilot IHS 3420, User Manual

8

Distance to inflammable materials
Your HWAM woodburning stove should always be installed on a non-combustible hearth. If it is installed 
on a wooden floor or similar, the floor must be covered with a non-combustible material. 

HWAM 3420, HWAM 3520, HWAM 3530 (Drawing A)

1. 

Recommended for brick wall

10 cm

1. 

For inflammable back wall

10 cm

2. 

For inflammable side wall

20 cm

1.

To inflammable wall,corner installation*

13 cm

3. 

Distance to furnishings in front

80 cm

*

All dimensions in connection with corner installation are only recommendations. Contact your chimney sweep 

for a clarification.

Remember to pay attention to any regulations concerning the required distance between 
the wall and smoke pipe.

The distance to a brick wall is set to faciliate the servicing of the HWAM Autopilot IHS

TM

. 

Please be aware that not all glass parts are heat-resistant. For this reason, a glass wall should sometimes 

be treated as a flammable wall, in which case we ask you to contact your local chimney sweep or glass 
producer to hear at what distance the stove should be kept from glass.

Requirements for chimney and smoke pipe
The chimney must be of a sufficient height to enable an adequate draft and to prevent smoke problems. 
The stove requires a draft of at least 12 Pa.
The chimney must have a minimum opening equivalent to Ø 150 mm. The  chimney opening should always 
be at least the size of the outlet socket of the stove. The chimney must have an easily accessible soot door.
Smoke pipe and chimney must always be suitable for a stove connection. Ask your HWAM dealer for 
more information.
Smoke pipe and chimney must always be suitable for a stove connection. Ask your HWAM dealer for 
more information.

Connection to chimney
All the stoves have both rear and top smoke outlet that can be connected to an approved steel chimney on 
top or directly out at the rear to a chimney.

Make sure that the chimney is tight and that no false draft is caused around neither the cover plate, in 

connection with a covered smoke outlet, nor the cleanout door and pipe connections. Please note that 

bent and/or horizontal smoke pipes will reduce the effect of the chimney draft.

Vertical cross-section of smoke flue (Drawing B and C)
B:  Top smoke outlet
C:  Rear smoke outlet
•  Steel chimney (9).
•  Flue gas elbow (10). Fits into smoke flue socket.
•  Brick-built jamb of flue (11).
•  Built-in pipe sleeve (12). Fits smoke flue.
•  Wall rosette (13). Covers disruption to wall around pipe sleeve.
•  Joint (14). Sealed with packing material.
•  Smoke outlets (15) of the HWAM stove.
•  Smoke flue regulating damper (16).
•  Soot door (17).