4
EN
Congratulations on a good choice of fireplace and thank
you for your confidence in Harvia’s products. Read
these instructions carefully before using the fireplace
and save them for future reference.
Fireplaces and iron stoves are long-lasting and
reliable heat sources when used correctly. Harvia’s
fireplaces and iron stoves are designed to be safe and
easy to use, while also looking good.
Fireplace structure
To increase safety and comfort of use, all Harvia
fireplaces feature double sheathing. This allows the air
circulating between the heating chamber and the outer
casing to efficiently cool the casing. The fireplace also
recycles and heats the room air.
The big and sturdy doors, fitted with ceramic glass,
increase the safety of the fireplaces and decrease the
intensity of the fire. The warm glow of fire through the
glass adds to the atmosphere. Combustion can be
controlled with the draught adjustment outlets and the
doors prevent sparks from flying into the room.
The frame and outer casing of the fireplaces are
made of steel plate painted with heat-resistant paint.
Depending on the model, the heating chamber is made
of either cast iron or strong steel plate protected by
heat-resistant ceramic brick.
All Harvia fireplaces feature a specially designed
heating chamber in which the fire can burn over a wide
surface, distributing heat evenly to the inner parts of
the fireplace. Thanks to the design of the flue bridge
and the top part of the heating chamber, the
combustion gases are efficiently conducted into the
smoke flue. The front part of the chamber has been
designed to prevent the embers from sliding against the
doors and to direct the air needed for combustion
straight into the embers.
All Harvia fireplaces equipped with a cast iron grate
have a big cinder box, which makes it easy to remove
excess cinder from the heating chamber.
Iron stove structure
The air circulating between the heating chamber and
the outer casing efficiently heats the room.
The sturdy and extremely tight cast iron doors are
equipped with a vertical latching device.
The iron stoves have a frame of steel board and an
outer casing of painted steel. The heating chamber is
made of either cast iron protected by firebrick at the
bottom.
The extended flame channel in the top part of the
heating chamber contributes to the efficiency of the
hot plates in the iron stoves and makes the stoves
excellent for heating room air.
Input of combustion air
In theory, a kilogram of wood needs some 3.7 m3 of air
for burning. In practice, however, the air coefficient
used for fireplaces with doors is 2–2.5 - that is, the
amount of air used per kilogram of wood is 7.5–10 m3.
The air coefficient of open fireplaces is 10–30, which
translates to 40–110 m 3 of air per kilogram of wood.
Combustion air is divided into two parts: primary air
and secondary air. Primary air is conveyed into the
lower part of the heating chamber either from
underneath the chamber or from the front. Secondary
air is conducted into the top part of the chamber to
ensure that all the gases are fully burned out.
In the Harvia fireplaces equipped with a grate, the
primary air is conducted into the chamber under the
grate and through the cinder box. In the models without
grates, the primary air is conducted through a channel
into the front part of the chamber, which is designed to
direct the air into the embers.
The amount of primary air needed for burning can be
adjusted by pulling the cinder box a maximum of 3 cm
outwards. Air outlets in or under the doors are used to
control the primary air in fireplaces and iron stoves
without grates.
The secondary air is conveyed into the heating
chamber through adjustable air outlets in the doors or
right under them. The secondary air cannot be
separately adjusted in iron stoves.
Harvia fireplaces and iron stoves