This whole home waterless HVAC diffuser is suited for homes up to 3000 sq feet.  It uses cold atomization technology to ensure the finest of droplets are dispersed throughout your entire home without any residue.  It features a quiet yet powerful air pump, plastic construction and a 800 ml fragrance bottle.  Like all of our machines it has wifi and/or bluetooth technology for remote programming and control.  There are infinite levels of intensity and 6 different working times that can be set.  This is actually the unit we use ourselves.  It's cost effective and performs well.  It has a 1 year warranty.