Slots and Plenums: Ventilation Design for Gaming Floors
Casino ventilation systems must balance guest comfort with strict air-quality rules. Plenums—large air-distribution chambers—sit above or below slot banks and deliver conditioned air directly to machines and players. In 2026 most new builds follow ASHRAE Standard 62.1 for acceptable indoor air quality.
Why Slots Need Dedicated Airflow
Each gaming machine generates heat from electronics and lighting. Without targeted cooling, hot spots form that reduce both player comfort and equipment lifespan. Plenums allow designers to place diffusers every two metres above banks of slots.
Plenum Construction Basics
| Galvanised steel or aluminium |
| Perforated supply-air face |
| Integrated smoke detection |
Modern plenums use galvanised sheet metal with perforated face panels. Sound baffles keep noise from the HVAC fans below 45 dB. Fire dampers close automatically if smoke is detected.
Air Changes and Filtration
Regulations require at least 15 litres per second of outdoor air per occupant. MERV-13 filters capture smoke particles and allergens. UV-C lamps inside the plenum reduce microbial growth on coils.
Energy Efficiency Upgrades
- ✓Variable-air-volume boxes adjust airflow based on
- ✓occupancy sensors. During low traffic periods, fan
- ✓Energy Efficiency Upgrades
Variable-air-volume boxes adjust airflow based on occupancy sensors. During low traffic periods, fan speeds drop and energy use falls by up to 30%. Heat-recovery wheels reclaim warmth from exhaust air in colder months.
Frequently Asked Questions
How often should casino filters be replaced?
MERV-13 filters are typically changed every 90 days or when pressure sensors indicate a 50 Pa rise.
Do plenums affect slot machine cooling?
Yes. Properly placed diffusers direct cool air into the base and rear vents of each cabinet, extending component life.
Are UV-C lights safe for guests?
Yes. Lights are sealed inside the plenum and never shine into occupied areas.