Deodorant spray deodorizers make optimum use of the characteristics of the microgel deodorizer with small - large airflows and low - medium concentration odors. These deodorizers spray the deodorizer into exhaust ducting to achieve major reductions in odor levels. Since the exhaust ducting is used as the reaction chamber, the equipment is compact and light-weight, consisting only of the deodorizer spray unit, piping, and spray nozzle, and can be used flexibly in confined spaces. The equipment can be installed at a cost of 1/10 to 1/3 of that of conventional combustion or activated charcoal systems.