2. Sound Levels of Lossnay Units with Built-in Fans
The sound levels specified for Lossnay units are generated from tests conducted in an anechoic chamber. The sound levels
may increase by 8 to 11 dB according to the installation construction material and room contents.
When using Lossnay units in a quiet room, it is recommended silencer duct, silencer intake/exhaust grill or silencer box be
3. Attaching Air Filters
An air filter must be mounted to both the intake and exhaust air inlets to clean the air and to prevent the Core from clogging.
Periodically clean the filter for optimum Lossnay unit performance.
4. Constructing the Ductwork
Always add insulation to the two ducts on the outdoor side (outdoor air intake and exhaust outlet) to prevent frost or
condensation from forming.
The outdoor duct gradient must be 1/30 or more (to wall side) to prevent rain water from going into the system.
Do not use standard vent caps or round hoods where those may come into direct contact with rain water.
(A deep hood is recommended.)
5. Bypass Ventilation
Do not operate "bypass ventilation" when heating during winter. Frost or condensation may form on the main unit.
6. Night purge function
Do not use the night purge function if fog or heavy rain is expected. Rain water may enter the unit during the night.
7. Transmission Rate of Various Gases and Maximum
Workplace Concentration Levels
(NDIR) for CO
• Gas Detector Tube
The fans are
positioned at the air
suction positions of
the Lossnay Core
80.6°F (27°C), 65% RH
* OA density for CO
is 600 ppm.
System Design Recommendations