The low NOx SER V5 burner delivers the best fuel efficiency of any burner in its class. Featuring a compact design incorporating both the burner and recuperator, the burner is easy to install and set up. With the burner and an enhanced performance recuperator co-axially mounted inside a radiant tube, the SER V5 internally transfers combustion exhaust heat back to the burner air supply in a counter-flow pattern. This provides high preheat temperatures. The new high-efficiency recuperator design incorporates a unique dual-finned combustor, which provides an increased heat transfer surface for greater fuel savings. The SER v5 delivers exceptional heat flux and temperature uniformity.