Beloved by builders, scorned by building scientists, and largely ignored by homeowners, recirculating hoods have a mixed reception. They do not require a wall penetration. They will not cause house depressurization. Some of the scientific testing shows them to be near useless in their current format but they could be a reasonable alternative to vented hoods if designed properly and maintained diligently. Is that asking too much?
Is there anyone out there with positive experiences with recirculation hoods (especially if it is supported by data)? Has anyone seen a recirculation hood design that is intrinsically superior? Or should we just continue the current advice to avoid these devices in favor of vented range hoods?