Why Restaurants Should Monitor CO2
Restaurants and cafes face unique air quality challenges: high occupant density, heat-generating kitchens, and customers who may be immunocompromised. Publicly displaying CO2 readings is increasingly seen as a mark of quality and care — much like a food hygiene rating.
The Business Case
- Customer confidence — diners increasingly check ventilation quality, especially since COVID-19 raised awareness of airborne transmission risk.
- Staff wellbeing — kitchen and service staff spend hours in these environments. Elevated CO2 contributes to fatigue, errors, and higher turnover.
- Regulatory compliance — several jurisdictions now recommend or require CO2 monitoring in hospitality venues, with 800-1,000 ppm targets during service hours.
- Competitive advantage — displaying low CO2 readings signals that your establishment prioritises health and comfort.
What to Look For
Restaurant monitors need specific features:
- Large, visible display — customers should be able to see readings from their table. Wall-mounted units with screens larger than 3 inches work best.
- WiFi connectivity — so managers can monitor levels remotely and access historical data. See our WiFi monitor recommendations.
- Alert thresholds — automatic notifications when CO2 exceeds 800 or 1,000 ppm.
- Durability — kitchens are hot, humid, and greasy. Choose monitors rated for these conditions.
Recommended Setup
- Dining area — one monitor per 50 square metres, mounted at 1.5 metres height, visible to customers.
- Kitchen — at least one monitor. Kitchens with gas stoves generate significant CO2 beyond what occupants produce.
- Bar area — high density areas need dedicated monitoring.
- Private dining rooms — small enclosed spaces with many diners are highest risk.
Ventilation Strategies
- Demand-controlled HVAC — increase airflow automatically when CO2 rises. This is the gold standard.
- Open windows and doors — weather permitting, natural ventilation is effective and free. See our budget ventilation guide.
- Portable HEPA filters — supplement ventilation with filtration for PM2.5 reduction. Note: filters do not remove CO2. See monitors vs purifiers.
Use the CO2 calculator to model expected CO2 levels based on your seating capacity and room dimensions.