Positive vs Negative Pressure Rooms

Positive vs Negative Pressure Rooms

Many industries use pressurised rooms to stop cross-contamination between one area of a building and another. For example, semiconductor makers use positive pressure rooms (PPR) to ensure their integrated chips are free of contaminants in the air. Hospitals and...
What is After-Hours HVAC?

What is After-Hours HVAC?

Definition: After-hours HVAC is the delivery and maintenance of a facility’s heating and air-conditioning services, outside regular operating hours, for the benefit of a tenant. Tenants pay an hourly rate (usually specified in a lease) for any costs associated with...