Brochure

Sound solutions for quiet cooling
HVAC system noise levels can vary widely, and excessive noise can impact the performance, productivity and overall satisfaction
of building occupants—as well as occupants of neighboring structures. That is why quiet operation is designed into every
Trane® Stealth
™
air-cooled chiller, and different levels of InvisiSound
™
acoustic reduction treatments are available to give you the
flexibility to meet specific application needs.
The key to every Stealth chiller’s low sound levels is the combination of variable-speed
compressors, variable-speed condenser fans and an integrated compressor muffler.
Because variable-speed compressors and condenser fans only operate as fast as
demand levels require, their overall sound levels are considerably less during off-peak
hours than those of constant-speed units. The integrated compressor muffler reduces
sound even more—up to 10 dB when compared to the previous compressor designs.
InvisiSound Superior package
For additional sound reduction, our InvisiSound Superior package adds acoustical
treatments to key sound-generating components, including the compressor’s suction
and discharge lines. This insulating material limits sounds normally emitted from the
lines, reducing total sound output levels even further.
A-Weighted Sound Level (dBA)
at AHRI Conditions
Screw
Chiller
Scroll
Chiller
Trane Stealth
Chiller
Screw Chiller
(low noise)
Magnetic
Multiple
Comp
Trane Stealth
Chiller with
InvisiSound
Superior
Trane Stealth
Chiller with
InvisiSound
Ultimate
Sound comparison of
300-ton air-cooled chillers at full load
106
104
102
100
98
96
94
92
90
88
86
84
InvisiSound technology benefits
Tiers of acoustic reduction
treatment options give you the
freedom to choose the unit sound
level that meets the requirements
of your particular application.
Acoustic reduction treatments
applied at the factory offer
predictable, consistent
performance, often saving
money when compared to
on-site applications.
Noise reduction mode allows you
to actively manage unit sound
levels to comply with nighttime
and weekend noise restrictions.
4
Variable-speed condenser coil
fans help reduce sound output.