Enviro is using Furnam's http://www.farnam-custom.com/air_heaters/heatTorch075.php I found one here for $145.00, Part number is HT075-400-120-1/8F-NF-X. No mods needed either. http://www.abbeon.com/store/item.cfm?code=HT075 Save's me close to $75.00 and it is the exact same as OEM. Interesting markup on these pellet stove replacement parts. Funny how much you can save with a bit of digging on the internet. Still looking into the replacement air pump. Just FYI for some of the others.