Heat Exchanger Stove w/ Windscreen

OK, inquiring minds want to know!  How miserly?  Great job BTW!

+1

Guys, I have more and better testing to do, but at this point, on average, 7 g’s to bring 16 oz’s of 42*F water to a boil seems a good average (68*F ambient room temp). The Sol Ti has, at times, been as low as 6 g’s. So, as I say, a bit more testing is in order. However, results thus far have been quite promising. When I get more time and a windmeter I’ll do more testing.

Also, a guy can dump the windscreen and lose the additional weight (1 oz) of the windscreen for a weight of 7.6 oz’s for the PRDLX and Inferno Pot.

FYI – I found a Stash pot, no stove or container, at REI Garage Sale section for $54. I contemplated it but recalled Jon’s testing so I passed. The Sterno pot costs less and weighs less. Admittedly, I’m pretty darn satisfied w Soto stove, Ocelot wind screen from Jon, and .75 Pasta pot. Thank you everyone for posting your HX pot data.

I want to add a couple data points… I cut the notches in the Inferno pot so that the base of the PRD is off the base of the pot the same distance as the Jetboil Sol. Also, boil elevation is 5,010′ above sea level.

I received my aneometer yesterday, but decided I need an digital thermometer too, so will order that.

I did have a Soto Windmaster, but just didn’t like it. I found it more fiddly than the MSR, my sample of one did not boil any faster than the PRD, and the Piezo igniter crapped out quickly. Also, the PRD very easily accommodated my windscreen design. The Soto did not. To be fair, my first PRD (2019) had an inconstant piezo too, even after a trip back to MSR for repair (their warranty/repair department absolutely sucks btw). I sold it and got another. The newer version (2021) works perfectly.

nice design – really compact

I take windscreen even if it’s not supposed to be windy.  There’s usually at least some wind on some days on every trip I go on.  I will use more than an extra ounce of fuel without windscreen.

The ignitor on the windmaster has always worked for me.

I have seen the ignitor on the PRD fail – you have to unscrew the burner cap, and when you screw it back on make sure the wire goes down inside the little plastic tube.  One could argue that this is a defect that disqualifies the PRD, although it’s easily fixed with no tools and most don’t have the problem.

I have wondered how wind effects the fuel jet itself. In other words, most windscreens try to shield the burner from wind, but what about the jet, how does wind disturb (or not disturb) the jet?

“how does wind disturb (or not disturb) the jet?”

on the third photo, opposite the stainless steel rectangular piezo, there are 4 holes about 1/4 inch diameter for air to come in.

Inside that is a pinhole that the fuel comes out of and gets vaporized.  Air comes in the 4 holes and mixes with the vaporized fuel and that goes up to the burner

My question is, does the windscreen have to go down below those 4 holes?

My windscreen doesn’t and seems to work okay.  It seems like this isn’t important but it’s not clear.

I have not seen it to be an issue on the stoves that I have tested.  My 2 cents.