Hospital Ward Acoustic Requirements Under HTM 08-01
Patient wards, recovery rooms, consultation rooms. Typical volume: 100-500 m³.
What HTM 08-01 Requires for a Hospital Ward
Clause reference: HTM 08-01:2013 §6.4
RT60 target: ≤ 0.8s (wards) | ≤ 0.6s (consulting rooms)
STI target: ≥ 0.60 (consultation rooms)
Background noise limit: ≤ 40 dBA (wards) | ≤ 35 dBA (consulting)
Measurement condition: Furnished, unoccupied
Note: UK NHS mandatory standard for new healthcare builds
How to Calculate HTM 08-01 Compliance for a Hospital Ward
- 1
Identify the applicable standard and target
Look up HTM 08-01 (HTM 08-01:2013 §6.4). For a hospital ward, the RT60 target is ≤ 0.8s (wards) | ≤ 0.6s (consulting rooms). Measurement condition: furnished, unoccupied.
- 2
Measure or model the room geometry
Record the length, width, and height of the room to calculate the volume. A typical hospital ward has a volume of 100-500 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 (125Hz to 4kHz) 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 the standard and specify treatment if needed
If the calculated RT60 exceeds the target of ≤ 0.8s (wards) | ≤ 0.6s (consulting rooms), specify additional absorption. 40-60% of ceiling + wall panels is typical for a hospital ward to achieve compliance.
Typical Acoustic Treatment for a Hospital Ward
Treatment Area
40-60% of ceiling + wall panels
Estimated Cost
£24,000-£38,000 per 100 m² ward
Hospital Ward: HTM 08-01 vs Other Standards
| Requirement | HTM 08-01 | WELL v2 Feature 74 |
|---|---|---|
| RT60 Target | ≤ 0.8s (wards) | ≤ 0.6s (consulting rooms) | ≤ 0.6s |
| STI Target | ≥ 0.60 (consultation rooms) | ≥ 0.60 |
| Background Noise | ≤ 40 dBA (wards) | ≤ 35 dBA (consulting) | ≤ 35 dBA |
| Measurement | Furnished, unoccupied | Furnished |
Frequently Asked Questions
What RT60 does HTM 08-01 require for a hospital ward?
HTM 08-01 (HTM 08-01:2013 §6.4) requires a reverberation time of ≤ 0.8s (wards) | ≤ 0.6s (consulting rooms) for hospital ward spaces, measured in the furnished, unoccupied condition per ISO 3382-2.
What background noise level is acceptable in a hospital ward under HTM 08-01?
HTM 08-01 sets a background noise limit of ≤ 40 dBA (wards) | ≤ 35 dBA (consulting) for hospital ward spaces. This typically refers to HVAC and building services noise measured with the room unoccupied.
How much acoustic treatment does a hospital ward need to comply with HTM 08-01?
A typical hospital ward requires 40-60% of ceiling + wall panels of acoustic treatment to meet HTM 08-01 compliance. Estimated installed cost is £24,000-£38,000 per 100 m² ward.
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