Delt Heat grills feature an 18 gauge 304 stainless steel burner with a ten (10) year limited warranty, but offers a fifteen (15) year limited warranty on the stainless steel grates and fabricated stainless steel housing. Delta Heat Built-In Grills and Freestanding Grills come in 26â³, 32â³ and 38â³ sizes. Delta Heat also offers a single and double side burner, drop-in coolers, sinks, and an outdoor refrigerator. This slideshow requires JavaScript.