DELTA has introduced a three-speed (540, 730 and 1200 cfm) digital ambient air cleaner, model 50-871.

It offers remote control convenience, programming features and digital readout indicating when the filter needs to be changed. It has a suggested retail price of $389 and is backed by a five-year warranty, according to the company. Contact: Delta Power Equipment Corp. Tel: 800-223-7278. www.deltamachinery.com

This article originally appeared in the December 2011 issue.