Classroom Acoustic Design in Germany — WELL v2 Feature 74 Requirements
Primary and secondary school classrooms, lecture rooms. Typical volume: 150-300 m³.
What WELL v2 Feature 74 Requires for a Classroom in Germany
Regulation: WELL v2 Feature 74
RT60 target: ≤ 0.6s
Background noise limit: ≤ 35 dBA
STI requirement: ≥ 0.60
Local note: WELL gaining traction in German international school projects.
How to Calculate WELL v2 Feature 74 Compliance for a Classroom in Germany
- 1
Identify the applicable Germany standard and target
Look up WELL v2 Feature 74 for classroom spaces in Germany. The RT60 target is ≤ 0.6s. WELL v2 Feature 74.
- 2
Measure or model the room geometry
Record the length, width, and height of the room to calculate the volume. A typical classroom has a volume of 150-300 m³.
- 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 ≤ 0.6s, specify additional absorption. Typical treatment cost in Germany is €22,000–€32,000.
Cost of Compliance in Germany
Treatment Cost Range
€22,000–€32,000
Currency: €
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 Classroom in Germany
| Requirement | WELL v2 Feature 74 | DIN 18041:2016 |
|---|---|---|
| RT60 Target | ≤ 0.6s | ≤ 0.55s (Class A) |
| Background Noise | ≤ 35 dBA | ≤ 35 dBA |
| STI | ≥ 0.60 | ≥ 0.65 |
| Cost Range | €22,000–€32,000 | €19,000–€28,000 per classroom |
Frequently Asked Questions
What RT60 does WELL v2 Feature 74 require for a classroom in Germany?
WELL v2 Feature 74 requires a reverberation time of ≤ 0.6s for classroom spaces in Germany. WELL v2 Feature 74. Measurement should be performed per ISO 3382-2 methodology.
What is the background noise limit for a classroom in Germany?
The background noise limit is ≤ 35 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 classroom in Germany?
Typical acoustic treatment for a classroom in Germany costs €22,000–€32,000. Costs vary based on finish quality, room size, and existing conditions.
Calculate WELL v2 Feature 74 Compliance for Your Classroom in Germany
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