3 m
1 m
3 m
7
Subject to Technical Modifications of GV-HR110
Isolering af kanaler, alt. A
Isolering af kanaler, alt. B
Forkert isolering af kanaler
Insulating ducts in cold rooms
If you want to make use of the aggregate‘s high recycling
rate (efficacy), the ducts must be insulated correctly.
Incoming and outgoing air ducts:
To reduce heat loss from the duct system in cold attics the
ingoing and outgoing air ducts must be insulated with
at least 100 mm insulation. If the insulation alternative A is
used, we recommend the insulating be done with 2 times
50 mm plate covers with paper or aluminium foil on the
outside and overlaying joints between the 2 insulation
layers. If the ducts are laid out on the roof rafters, then
alternative B can be used. The insulation must always be
packed tightly around the pipes.
Outside air and exhaust air ducts in cold rooms:
Outside air and exhaust air ducts must be insulated with
PE30-insulation. The outside air ducts can be insulated
with even thicker insulation to avoid warm air in the attic
from heating the incoming air during the summer.
Make sure that the closures are tight where the exhaust
air duct comes through the roof or through the gable so
that damage from condensation is avoided.
Duct system
We recommend that the duct system be made of
spiralflanged pipes and couplings made with rubber
ring seals to assure a sealed, durable duct system.
To assure a satisfactory low aggregate noise level, always
mount an exhaust silencer on the ingoing and outgoing
duct system between the aggregate and the first ingoing
and outgoing units.
We recommend dimensioning the air speeds in the ducts
sufficiently low so that no noise occurs from the ingoing
and outgoing air units.
When placing the outgoing air and exhaust hood/grid
make sure that the two air flows are not short-circuited
thereby avoiding the outgoing air being sucked in again.
We recommend placing a grid on the north or east side of
the house for optimal comfort in the residences/flats.
Minimum distance: 3 metres between the outside air intake
and exhaust air.
Insulation of ducts alt. A
Incorrect insulation of ducts
Insulation of ducts, alt. B
