Pet Zone HVAC planning anchor: pet dander HVAC filtration
Engineering targets for pet zone comfort: airflow direction, return path, acoustic floor, RH stability, and equipment sizing per Manual J load. The audit measures each.
Pet zone HVAC scope in homes with one or more dogs or cats uses the return-side air path as the primary leverage point. The math: a 3-ton system at 1,200 CFM circulates the entire indoor air volume of a 2,000 sq ft home through the return-side filter every hour. The catch is that only the air passing through the filter media (not around it via door perimeter bypass) actually gets filtered. ASHRAE 52.2 Appendix J permits ≤5% bypass; field measurements in pet households routinely show 12–22%. The remediation is a 4-inch sealed cabinet retrofit with gasketed door, ¼-inch foam tape on the filter perimeter, and a static pressure verification test before and after. Cat allergen Fel d 1 carriers span 1–10 microns; MERV 13 captures the majority when the filter actually receives 100% of return air.
What this page covers: diagnostic protocol, install paths, pricing bands, and the room-specific failure modes Marcus catches during (city) => city-wide audit work.