Hi, Harvey. I'm sending back a hello " Rruff" to you, And hope your bed's near a HRV system too. My husband suffers from Asthma as well. HRV's help with cats hair, and with doggie smell! Yes frankly, Asthma does really "suck", But HRV's filters deal with the dust mites and 'muck'. So New Zealand, ..... what we can do, Is, YOU ALL GO AND GET A HRV TOO!