How Is Cattery Ventilation Designed to Protect Cat Health?

The diffuser layout is the heart of cattery ventilation design. The engineer selects low-velocity diffusers or displacement ventilation that introduces tempered air at low speed, and aims throws to wash walls and open floor rather than striking condos, perches, or window shelves. In rooms with tall cat trees or wall-mounted perches, the engineer models or carefully reasons through the air path at multiple heights, because cats live in the upper third of the room while thermostats and diffusers are designed for the lower two-thirds. Temperature control is tighter than in dog kennels. Cats prefer warmer resting spots, and colony rooms are typically held a few degrees warmer than dog runs, with radiant or perimeter heat options that let cats choose warm surfaces. The engineer zones cat housing separately from dog areas in mixed facilities and gives the colony its own thermostat — a single zone serving both species satisfies neither. Night setback is minimal, since the cats never leave.

Litter dust is a filter-loading problem the engineer plans for explicitly. Filter banks are oversized relative to the airflow so pressure drop stays low even as dust accumulates, and the specification calls out the expected change interval under real litter-dust conditions — shorter than a typical commercial schedule. Pre-filters protect the final filters, and the engineer places filter access where maintenance staff can service banks without entering cat-occupied space, which keeps both the filters and the cats calmer. Exhaust strategy captures contaminants at the source. Litter areas get dedicated exhaust pickups where the room layout allows, and the general room exhaust is positioned high to catch warm, dusty air. The engineer avoids recirculating colony air without high-efficiency filtration, and where energy recovery is used for code compliance, it is specified as a type that transfers heat without transferring air — so pathogens and dust never cross from exhaust to supply.

Use this checklist during design and plan check: • Colony-room air-change rate sized from cat count and room volume, delivery verified draft-free at perch height • Low-velocity diffusers aimed away from condos, perches, and resting shelves • Independent ventilation zones for intake, isolation, and general colony — never shared with dog areas • Filter banks oversized for litter-dust loading with a realistic replacement schedule • Heat-recovery type selected to transfer energy without transferring air between streams • Noise criteria set for feline stress: quiet fans, low duct velocities, isolated equipment • Colony thermostat separate from dog zones; minimal night setback since cats remain overnight • Filter and equipment access located outside cat-occupied space