Canon Inc has finally taken the lead from green printer vendors, launching printer engines conforming to the US government’s Energy Star requirements. The manufacturer’s LBP-PX and PX-II engines both print at 4 pages per minute, delivering 300 and 600 dots per inch respectively. They have minimal ozone, according to Canon, and are smaller than the firm’s current BX models, from which they are derived. The systems include a Power-On-Demand fusing unit which only uses power when printing is in progress. One of the most visible benefits here is that the irritating warm-up time is eliminated. The engines also use the EP-P cartridge system, which uses ultrafine toner. The OEM prices are negotiable.