The basic AIR-igator™ comes in a 65 gallon size, and several can be connected, depending upon the area to irrigate and the efficiency of the air conditioning unit. We recommend that emitters of 1 gal/hr be used and the system should be limited to 1 emitter per gallon of available water. The systems should be designed to operate for at least one hour; each time the reservoir is filled. This provides each plant, tree, or drip point, 1 gallon of water per application.