Open Plan Office Acoustic Design in Australia — WELL v2 Feature 74 Requirements
Open plan workspaces, trading floors, collaborative offices. Typical volume: 500-5,000 m².
What WELL v2 Feature 74 Requires for a Open Plan Office in Australia
Regulation: WELL v2 — growing adoption in Sydney, Melbourne
RT60 target: ≤ 0.5s
Background noise limit: ≤ 45 dBA
STI requirement: < 0.50
Local note: Green Star IEQ-11 includes acoustic comfort aligned with WELL.
How to Calculate WELL v2 Feature 74 Compliance for a Open Plan Office in Australia
- 1
Identify the applicable Australia standard and target
Look up WELL v2 Feature 74 for open plan office spaces in Australia. The RT60 target is ≤ 0.5s. WELL v2 — growing adoption in Sydney, Melbourne.
- 2
Measure or model the room geometry
Record the length, width, and height of the room to calculate the volume. A typical open plan office has a volume of 500-5,000 m².
- 3
List all surfaces and their absorption coefficients
For each surface (floor, ceiling, walls, windows, doors), find the absorption coefficient at each octave band frequency (125 Hz to 4 kHz) from ISO 354 test data or a materials database.
- 4
Calculate total absorption and apply the Sabine or Eyring equation
Sum all surface absorption values: A = sum of (alpha x area). Then apply T60 = 0.161 x V / A (Sabine) or T60 = -0.161 x V / (S x ln(1 - alpha_avg)) (Eyring). Use Eyring when average alpha exceeds 0.20.
- 5
Compare result against WELL v2 Feature 74 and specify treatment
If the calculated RT60 exceeds the target of ≤ 0.5s, specify additional absorption. Typical treatment cost in Australia is AUD 130–AUD 220/m².
Cost of Compliance in Australia
Treatment Cost Range
AUD 130–AUD 220/m²
Currency: AUD
What Affects Cost
- • Room volume and surface area
- • Target standard strictness
- • Existing acoustic conditions
- • Finish and material quality
How WELL v2 Feature 74 Differs from Other Standards for Open Plan Office in Australia
| Requirement | WELL v2 Feature 74 | AS/NZS 2107:2016 |
|---|---|---|
| RT60 Target | ≤ 0.5s | ≤ 0.8s |
| Background Noise | ≤ 45 dBA | 40–45 dBA |
| STI | < 0.50 | Not specified |
| Cost Range | AUD 130–AUD 220/m² | AUD 100–AUD 180/m² |
Frequently Asked Questions
What RT60 does WELL v2 Feature 74 require for a open plan office in Australia?
WELL v2 Feature 74 requires a reverberation time of ≤ 0.5s for open plan office spaces in Australia. WELL v2 — growing adoption in Sydney, Melbourne. Measurement should be performed per ISO 3382-2 methodology.
What is the background noise limit for a open plan office in Australia?
The background noise limit is ≤ 45 dBA under WELL v2 Feature 74. This typically refers to HVAC and building services noise measured with the room unoccupied.
How much does acoustic treatment cost for a open plan office in Australia?
Typical acoustic treatment for a open plan office in Australia costs AUD 130–AUD 220/m². Costs vary based on finish quality, room size, and existing conditions.
Calculate WELL v2 Feature 74 Compliance for Your Open Plan Office in Australia
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