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2. Noise Value of Lossnay with Built-in Fans
The noise level specified for Lossnay units is as that measured in an anechoic chamber. The sound level may increase by 8 to
11 dB according to the installation construction material, and room contents.
When using the Lossnay in a quiet room, it is recommended that measures such as installing a muffling duct, silencer
intake/exhaust grill or silencer box be carried out.
3. Attachment of Air Filter
An air filter must be mounted to the air inlets (both intake and exhaust) of the Lossnay to clean the air and to prevent the Core
from clogging. Always mount this filter, and periodically service it.
4. Duct Construction
Always treat the two ducts on the outdoor side (outdoor air intake and exhaust outlet) with insulation to prevent frosting or
condensition.
The outdoor duct gradient must be 1/30 or more (to wall side) to prevent rain water from infiltrating the system.
Do not use the standard vent caps or round hoods where they may come into direct contact with rain water.
(Instead, use of a deep hood is recommended.)
5. By-pass Ventilation
Do not operate with "By-pass ventilation" when heating during winter. Frost or condensation may generate on the main unit
and cause discolouring of the ceiling, etc.
CHAPTER 5
System Design Recommendations
59
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