Broilmaster R3B Infrared Combination Propane Gas Grill On Black In-Ground Post. R3B + BL48-G. Post & Patio Mount Gas Grills. Broilmasters R3B Series Infrared Combo gas grills feature two burner styles, infrared and conventional, for a total of 40,000 BTUs of cooking power. With this burner combination, the variety of foods cooked on the grill are endless. Sear steaks with the infrared burner, while cooking vegetables with the conventional burner. Both burners operate independently for a broad temperature range. The Broilmaster Infrared Combo grills also feature 695 square inches of total cooking area, 3 level adjustable cooking grid and multi-position lid stop for more precise temperature control. This grill comes with heavy-duty black painted steel in-ground post for permanent installation.