The heat in my Cozy MKIV was pretty much non-existent utilizing the plans-built heat shroud, and my wife complained that she was freezing. I was, too. I did some research and decided that this product would be the solution to all my (her) problems. I had found a cracked exhaust header on my plane, so I took the opportunity to have it rebuilt in a way that this heat muff would fit (otherwise it would not have fit my Cozy). I took a lot of measurements and sent some drawings to Dave, as I was going to need a very custom version of this heat muff to fit under my tight cowl. It was quickly produced to spec and delivered. I installed it, and boy, what a difference. On our last flight, my wife complained that she was cooking because she was so hot, and could I please turn the heat down? The build quality and customer support from Dave is second to none. If youre looking for a solution for the heating needs in your plane, this is definitely the answer.

I worked with Dave on the measurements for my custom cabin heat muff. A well crafted design with outstanding workmanship. This will provide the warmth necessary for cold weather flying.

Great service from Dave, checking to make sure the dimensions of the special order heater muff were correct and for fabricating and shipping in a timely manner. A well built product that provides more heat , is more secure, and easier to remove for exhaust pipe inspection than my previous standard Vans muff. Using it on an RV-6 with a Lycoming O-360.

Very well designed and constructed product, Dave followed up my order via email to ensure I got what I was looking for with a carb heat setup for my new build RV 3B. I now have a Carb Heat Muff that I can have confidence in along with his Turbo Cabin Heat Muff which will last the life of the aircraft. Thanks Dave, outstanding help and service.

Outstanding product and customer support! More compact, easier to install, and more heat than my old muff. I also required custom placement of the inflow and outflow ports (one angled!)--Dave was super-easy to work with and got mine delivered in days...not weeks! You cant beat this heat muff worth every penny.

Incredible device that produces considerably more heat than the stock Vans component. Installed on my RV-7 and could not be more satisfied!!

I installed this heater in my Lancair ES Super recently and Im extremely happy. I like the reduction of usable space and I finally have usable heat in the cabin. LOVE IT!

Super easy install, very well made, and good install instructions. Gave me cabin heat and plenty of it.

This device does as advertised. Living in Northern Vermont and flying and RV-7A means you need the best possible cockpit heating system. Ive tested this muff several times now (at about 15 degrees Fahrenheit) and this new muff out performs my original. On an RV7 the standard issue muff is 8 in length. My exhaust pipe has room for 9 so I ordered the extra length. I also lightly packed a bit of stainless steel scrub pad between the inside tubes (instead of restricting the flow as recommended in the install instructions). Finally I connected the air flow to run counter to the exhaust flow direction. Im finally comfortable in my cockpit in January in Vermont using this new muff.

Im using this product on an RV8A, and the cabin heat improvement was quite impressive. Installation was simple and clean.

I am using this product on my home built Zenith Zodiac 601XLB, it has improved my cabin heat 100 %. It is an easy installation and I am totally pleased with my increased cabin heat.