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Super-Quiet High Wall & Ceiling Cassette Water Fan Coil Units
Hydronic Fan Coil Unit Sound Testing Information

 

Extremely quiet in comparison to all other brands and models of high-wall and cassette water fan coil units, the Chiltrix hydronic fan coil units are tested throughout the design iteration phase in the most accurate way possible, and the final products are tested for conformity. In this process, a free-field setup isolates direct sound for precise, reflection-free analysis. Sound measurements are performed in our factory’s own on-site Hemi-Anechoic Chamber as shown below

Sound testing is in accordance with GB/T 9068-1988 (Determination of sound power levels for noise emitted by heating, ventilating, and air conditioning equipment - Engineering method) as specified in Appendix C of GB/T 19232-2019, which details the noise testing procedures for fan coil units. Tests are conducted at rated airflow and static pressure, with measurements taken at multiple microphone positions around the unit to calculate A-weighted sound power levels in octave bands. This process aligns with ISO 3744:2010 (engineering method for free-field over reflecting plane), which GB/T 9068 adapts for HVAC. The procedure ensures directional accuracy for noise emission, differing from reverberant methods by isolating direct sound.
Sound Level dB(A) HW98 HW130 HW220 CC68 CC120
High Speed 32 41 47 31 40
Medium Speed 26 35 41 27 36
Low Speed  23 25 32 23 31

What are Decibels? A Decibel is a comparitive level of sound pressure. The scale is logarithymic.

  • 0 dB is not "no sound," just as a 0 on the Richter scale isn't "no movement". It is a baseline reference for the very quietest sound the human ear can hear.
  • A 10 dB increase is 10 times more intense, just as each step on the Richter scale represents a tenfold increase in the shaking.
  • A 20 dB increase is 100 times more intense, not 20 times more. A magnitude 7 earthquake is vastly more powerful than a magnitude 5. The decibel scale works the same way. 
So what is dB(A)? The "A" in dB(A) (A-weighted decibels) indicates a filter that mimics human hearing, giving less weight to very low and very high frequencies, with emphasis on what a human can hear. A 1 dB increase is often described as the smallest human-perceptible change in volume. A 10 dB increase is generally perceived as a doubling of the loudness.


To the right are some common sounds and the typical decibel levels.


 

See Specification Sheet For High Wall & Cassette Water Fan Coil Units (Hydronic Fan Coil Units)

See IOM High Wall & Cassette Installation Manual

 

PLEASE CONTACT CHILTRIX FOR MORE INFO, DESIGN, SIZING, OR PRICING INFORMATION
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High Wall Fan Coil & Cassette Units Can Be Used With Air To Water Heat Pumps, Boilers, Hydronic & Radiant Systems Etc.

 

Home. office or residential small chiller heat pump air conditioner
AHRI certified chiller mark 550/590

Chiltrix World's Record Holding Air To Water Heat Pumps are Rated and Certified in Accordance with AHRI 550/590


Chiltrix High Wall & Ceiling Cassette Fan Coil Units are Rated and Certified In Accordance with AHRI 440.



See AHRI Certificates:
 High Wall Units
HW98 AHRI Certificate
HW130 AHRI Certificate
HW220 AHRI Certificate
Ceiling Cassette Units:
8CC68 AHRI certificate
CC120 AHRI Certificate


Note, Chiltrix has additional models of high wall and ceiling cassette fan coil units that are AHRI certified, but not produced for USA stock. They are available for large orders/projects.

See spec sheet.

 

 

 

 

 

 

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