Fisher PTTW-10-EC Series Engineering Manual page 6

PTTW-10 NOISE LEVEL TESTING RESULT
**The Noise test is done in semi reverberant room , with ambient noise level 23.2 dB(A) ,
the structure is not perfectly appropriate for the double ducted machine , for this reason the
indoor noise level is corrected by - 4 dB(A) and outdoor noise level is corrected by – 5 dB(A)
calculated.
SPL ( Sound Pressure Level ) dB(A)
Indoor Fan Mode
Indoor Cooling / Heating Mode
Outdoor pipes
THROUGH THE WALL UNIT
MIN Speed MED Speed
41.1 44.4
43.7 46.0
46.6
Max Speed
47.6
48.2
- 58.1
5