18x36 in hobby unit. I used it for one year but I have since bought a larger setup and dont need this anymore. I acheived 8-12gph depending on the day or if I was using a blower.. it has raised flues that the previous owners put it. Works very well pan was converted to 100% stainless this past season Questions text (preffered) 814-807-4788 Or email at foxtailsugary@gmail.com