"Quality first, Honesty as base, Sincere service and mutual profit" is our idea, in order to develop continuously and pursue the excellence for Through Wall Heat Recovery Ventilation, Portable Uv Light Air Purifier , Wall Mounted Room Air Purifier , Industrial Air Purifier ,Air Purifier With Ionizer And Uv Light . All prices depend upon the quantity of your respective order; the extra you purchase, the extra economical the rate is. We also offer fantastic OEM provider to numerous famous brands. The product will supply to all over the world, such as Europe, America, Australia,Israel , Mexico ,Mecca , Kuwait .Our factory insists on the principle of "Quality First, Sustainable Development", and takes "Honest Business, Mutual Benefits" as our developable goal. All members sincerely thanks for all old and new customers' support. We will keep working hard and offering you the highest-quality products and service.Thanks.