air purifiers or however u spell r rubbish,just make own activated carbon filter,get the gel(type in google odour eliminating gel etc)or cooker hood filter after exh fan,but pipe dropping 2 fl with bend 4 neg pressure,make tube with mesh & fill with granules or cover with c.hood refill,its black 'n' spongy,check out google or ive read u can use crystal kitty litter,u can mix bicarb soda with act carbon from pet shops or aqariums,remember holes in bottle etc to let cleansed air out.Hope this helped sum1. I have also heard of odour eliminating grow bulbs too but best to look it up,im trying 2 find decent 10in auto feminised fruity plant ideal 4 cfl's (125w growlite dual spect-www.basementlighting.com £19.95p bargain,one lite not 8x25w normal energy bulbs,no good,only use evirolites,plug 'n' grows,growlamps,not normal house lites,no good but people still do!) Make sure venting is smooth type not corrigated e.g dryer,no has 2 b smooth 4 airflow so pressure dosnt overwork fan or dimming down filter strength,use pipe 4 sewage/gas,not corrigated,up 2 u if u do.Check out google/utube,enter wot u want!