Which espresso machine is better? A heat exchanger OR a dual boiler? Diletta Alto vs Diletta Bello+

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Күн бұрын

Пікірлер: 31

@ronald8932 Ай бұрын

Sorry for this amateur question. While brewing with the heat exchanger, it took 20 seconds for the shot. However, with the dual boiler, pulling the shot required 29 seconds. What did you use to determine how long each shot required?

@paulallen3511 Ай бұрын

That has to be dialed in for each machine and each bean. Even the same bean as it ages can affect the extraction time. Between different machines, variations in pump pressure, the shape of the portafilter and all kinds of factors will come into play. You can probably find dozens of videos on "dialing in espresso" on here that will talk about this stuff.

@ronald8932 Ай бұрын

@paulallen3511 I can now see that as I open one door, there are 10 other doors that need to be opened for additional information. Thank you for sharing your knowledge. I've got some

@ronald8932 Ай бұрын

Additional videos to watch.

@bluemystic7501 Ай бұрын

It was 27 seconds vs 29 seconds. Time doesn't matter as much as yield.

@SeattleCoffeeGear Ай бұрын

@paulaellen3511 great and thoughtful response - we agree!

@baghdaddy202003 5 күн бұрын

Does the Alto have a 220 volt option?

@alexhui8769 Ай бұрын

Dumb question, I'm new to espresso machines. Why are you dealing with a range of temperature on a heat exchanger machine if it contains a PID? Not sure I understood that part. Couldn't you adjust the PID to make on the fly adjustments?

@Vortex1988 Ай бұрын

Intuitively, you would think you could just adjust the brew temperature using the PID, but that is not how a heat exchanger works. The boiler in a heat exchanger is used to directly control your steam temperature and indirectly heat your brew water. This is because the brew water is consistently being circulated between a tube inside the boiler and the group head where you plug in your portafilter. Meanwhile, the water used for steam just stays stationary inside the boiler. The steam water surrounds that brew water tube inside the boiler indirectly heating the brew water, while the brew water is circulated through that tube inside the boiler, out to the rest of the machine, and back into that tube over and over again. With the PID, you can set your steam temperature, but the brew water will always be indirectly heated by the hot steam water. You don't have direct control over the brew temperature as a result, and if a heat exchanger is left on for too long without making a shot of espresso, then you may see a higher than normal brew temperature. Either way though, since you don't have direct control over the brew temperature, you're always going to be working with a certain range of temperatures rather than a set one.

@alexhui8769 Ай бұрын

@@Vortex1988 Thank you!

@fairalbion Ай бұрын

Great video (Nitpicking but US household voltage is actually 120V. It became the standard in the late 1920s.)

@peterward5356 Ай бұрын

are these dialetta models directly comparable to a quick mill equivalent? would love to know as im in australia and we only have the QM (which i love)

@SeattleCoffeeGear Ай бұрын

We work with Quick Mill directly to manufacturer the machines, but we do quite a few modifications internally to make this unique to our lineup based on features we have always wanted in machines, and upgrades our customers have always asked for. So the machine might have an external case that looks like a Quick Mill but its feature set is unique to Diletta.

@paulallen3511 Ай бұрын

One thing I like about a heat exchange machine is that your brew water is fresh water heated on the fly vs water that's been sitting in the boiler getting heated over and over. I don't know how much that affects the taste or if it picks up anything from the brass/steel of the boiler, but it feels cleaner to me somehow.

@bluemystic7501 Ай бұрын

Do a blind test, lol.

@mryoyo7741 Ай бұрын

@@bluemystic7501why😅

@bluemystic7501 Ай бұрын

@@mryoyo7741 Because you wont be able to tell the difference, lol.

@paulallen3511 Ай бұрын

@@bluemystic7501 Probably not with a modern stainless steel boiler machine with treated water. A a brass or aluminum boiler with higher mineralized water - I would expect a difference in taste.

@bluemystic7501 Ай бұрын

@@paulallen3511 It's ok to have a materials preference but I'd bet my life savings that you couldn't tell a difference in a blind test.

@JeffreyEgertson Ай бұрын

It appears that you let the dual boiler run a little before you pulled the shot - I would have thought that unnecessary given the purpose of letting it run beforehand on the heat exchanger is to get the temp down below super heated level? Am I missing something??

@johnholmquist9277 Ай бұрын

Good catch! Its best practice to purge/flush for a few seconds on any machine before pulling a shot. It can help stabilize the brew temperature right before brewing. It also helps keep the group a little cleaner.