Lochinvar BNR2401 MAIN BURNER LOCATED UNDER HOT SURFACE IGNITOR ON LP ONLY, ALL LP <p>Used in the following models: CB 495, CW 495, CS 495, CB 645, CW 645, CS 645, CB 745, CW 745, CS 745, CH 750, CF 750, 750, CH 650, CF 650, 650, CH 500, CF 500, 500, CH 400, CF 400, 400, CH 300, CF 300, 300</p> NO LONGER AVAILABLE