The Nighttime Recovery Standard

1. The Core Mandate

All residential units must be capable of reaching a Safe Recovery Temperature of 26°C for at least 8 continuous hours between 10:00 PM and 6:00 AM.

2. The Science (Why?)

Tropical nights prevent cardiovascular reset.

“Mortality risk increases by ~10-60% during tropical nights.” — WHO Heat Guidelines

3. Implementation

3.1 Passive First

Before mechanical cooling is installed, landlords must install external shading on South/West facing windows.

3.2 The “Cool Room” Variance

If central AC is not feasible, the landlord may designate one “Recovery Room” that meets the standard.