a Daikin Sound Enclosure Unit

Sound closure case study

What is the acoustic effectiveness of the sound enclosure?

What is the acoustic effectiveness of the sound enclosure?

 The acoustic effectiveness of Daikin’s new Sound Enclosure for its Sky Air and VRV 5 outdoor units has been validated by field trials undertaken at a residential installation in Burgundy, France, showing significant sound reductions equal to and even exceeding factory test room values.

A study in excellence

For the homeowner of a residential property in rural Burgundy at Flassy, eliminating any sound disturbance was essential. Expert specialists Alhyange Acoustique carried out tests on the installation of a Daikin Sound Enclosure, fitted to the Daikin Sky Air RZAG125N outdoor unit, to measure its acoustic performance in real life.

A residential property fitted with a Daikin Sound Enclosure Unit.

A series of microphones were positioned in the garden at intervals of one metre, two metres, five metres and 10 metres to capture a comprehensive range of data, before and after installation of the sound enclosure. Additionally, tests were carried out inside the house through open and closed windows to complete the analysis process.

Series of microphones testing the sound levels of the Daikin Sound Enclosure Unit.

The exercise has established unequivocally the positive effect of adding a Daikin Sound Enclosure, with a drop in sound levels at all points and an overall sound power reduction of -10 dB (A), which matches documented test values. Similarly for sound pressure at one metre around the unit, a significant reduction of -7dB(A) at the front and -14 dB(A) at the side was recorded, which not only meets but exceeds original test values.

Concludes Alhyange Acoustique:

“The measurements carried out show a significant drop in sound level that confirms the data released by the factory, which is very big advantage to assess the impact of the enclosure on its environment, facilitating future project preparation.”

Alhyange Acoustique employee testing the sound levels.

Figure 1: Comparison sound power level per octave band with and without enclosure

 

Sound power level Lw in dB
per octave band in Hz

Overall
Lw level
in dB(A)

 

Difference in dB(A)

63

125

250

500

1.000

2.000

4.000

8.000

Without sound enclosure

69.5

70.0

66.5

64.5

61.5

58.5

56.0

50.0

67.5

 

- 10.0

With sound enclosure

68.0

68.0

58.5

50.5

42.0

39.5

46.0

34.5

57.5

 

Figure 2: Comparison overall sound pressure level at one metre around the unit with and without enclosure

Measurement point at one metre

Overall sound pressure level Lp in dB(A)

Difference in dB(A)

Without enclosure

With enclosure

Front

55.0

47.5

-7.5

Left

57.0

43.0

-14.0

Right

52.5

42.5

-10.0

Back

57.0

49.0

-8.0

 

Figure 3: Overall sound pressure level map before and after sound enclosure installation

Comparison on a heat map about how much sound the Sound Enclosure Case absorbs.

 

 

For more information consult the detailed test report

Sound investment

Specifically designed for the Sky Air (RZAG-N*/RZA-D) and VRV 5 heat pumps (RXYSA*), the new Daikin Sound Enclosure significantly reduces exterior sound levels and noise transmission. Greatly extending flexibility, this allows the application of heat pumps even in very sound sensitive areas.

Factory-tested, the new Daikin Sound Enclosure comes with guaranteed performance data on its superior sound and efficiency, with minimal capacity reduction. Thanks to the available factory-data design layout and planning is fast.

Easy to install from new or to retrofit, the smooth anthracite finish of the Daikin Sound Enclosure ensures an unobtrusive appearance.

More information such as databooks etc can be downloaded from the Daikin business portal for registered users here, or more information can be found in the brochure below.

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