Lennox’s SL280NV Ultra Low NOx gas furnace is the first product on the market that meets new California low-emission regulations. The furnace produces 65% lower NOx emissions than standard low NOx furnaces, Lennox says, burning more NOx emissions at a higher temperature. The SL280NV has a heating efficiency rating of 80% AFUE and includes a variable-speed blower and two-stage gas valve for quiet adjustment of airflow and heating output. Pricing varies by distributor. lennox.com
