Cool-n-Save Expansion Kit is recommended for 3 ton and larger residential air conditioning units. The kit contains everything you need to give your Cool-n-Save misting system greater misting coverage over the entire unit. This kit doubles the misting capacity of the Cool-n-Save basic kit – but it is not needed for air conditioning units that are smaller than 3 tons. The expansion kit comes with three additional misting nozzles plus extra tubing and connectors needed to complete the expansion installation. The goal is to produce more mist for a larger coil array. Cool-n-Save is an amazing, patented product, that is actually based on the same scientific principles that large corporations have used to save themselves money for years. The Cool-n-Save Expansion Kit Manufactured from 95% recycled plastics. Click here for Cool-n-Save Expansion kit installation documentation.