Dual Boiler or Single Boiler Coffee Machine (What is the difference?)

[@bartdeking]

Both dual boiler and heat exchangers can come with rotory pump and with pid temperature control. The main difference is the consistency. A PID dual boiler machine can maintain the set temperature generally very accurate. With A heat exchanger the temperature in the coffee starts cold then very hot and then to the set temperature since the first bit of water is in the grouphead, the next bit is stationary in in the boiler and then the next water comes from the reservoir trough the boiler. Also while my dual boiler has 2x1L i can set the steam boiler to 2 Bar or 135 degrees ideal for quick high quality milk foam while keeping the brew boiler at 92 to 98 depending on the roast.

[@KellyanneGill]

I've got a HX machine and it does have a PID, and it's been fun getting the feel of having a HX PID machine and being able to play with temps

[@ArtistiCoffeeRoasters]

Awesome! Being a HX and pid it’s good to advise that as you lower the temp you may loose or reduce steam pressure. Cheers luke

[@KellyanneGill]

@@ArtistiCoffeeRoasters it depends on what I'm having, roast wise, I usually have the PID, set to around 122-124 degrees Celsius

[@nrafaco]

Great explanation. Everyone should see it before choosing a machine

[@ArtistiCoffeeRoasters]

Thank you. I appreciate the feedback, I did hope it helps people decide what is the right machine for them. Cheers luke

[@davem4423]

Thanks for the vid, i didnt know about flushing the boiler to prolong its lfe, great tips , thanks again from a subscriber in the uk

[@pablolankenau]

I'm so confused, why would you need a dual boiler for straight espresso? What about a single boiler with PID?

[@Baristabamweyana]

Thanks for the great knowledge I would such descriptions on bigger machines as well like the GB5 and strada 3AZ. Thanks

[@ArtistiCoffeeRoasters]

Yes we will do more commercials for sure, a bit of a focus on domestic at this time of the year when people are looking to buy for Christmas and sales etc. cheers luke

[@varunshah3262]

I generally have straight espresso & enjoy medium roast blends, i am considering apartmento or tca as it has a smaller footprint, but would you advise spending a little more and upgrading to a dual boiler as i brew mostly 2 shots a day.

[@Graggs]

I have a couple of questions; Are all machines described with a boiler, actually boiler HX'ers? And, slightly more contentious, how do you rate some of the later dual thermoblock machines? Eg the Ascaso Steel Duo? Thanks for the great (high quality) content

[@ArtistiCoffeeRoasters]

You can have a single boiler machine like a Rancillo Silvia, with this you have to choose if you want to boil water then empty it and make steam. then you have a single boiler HX which can do both at the same time, thats what makes them great. The thermo blocks are different tech, you have to get the to hear the water or steam as is passes through the element, so not as stable and won’t be able to produce as much volume. It still a good tech in the appliance range

[@Graggs]

Great thank you @@ArtistiCoffeeRoasters

[@explorebali5337]

great content with information

[@ArtistiCoffeeRoasters]

Glad you liked it, thank you :)

[@AveldaFerreira]

Do certain HX single boiler machines allow for direct plumbing?

[@ArtistiCoffeeRoasters]

Yes, any HX that has a rotary pump. Most brands offer this. Quick mill have the Aquila, rockert offer many of their range in V- vibration pump or R - rotary

[@fatema____]

How often and how much hot water should you flush from a HX hot water tap?

[@ArtistiCoffeeRoasters]

When ever you turn it off it’s better to empty the hot tap, then when no water comes out, close it and empty from the steam wand. This then means when you turn back on it will be 💯 clean water and the minerals will flush out, not get cold and settle to the bottom. Check out my video on HX tips . Cheers luke

[@fatema____]

@@ArtistiCoffeeRoastersnoted, thanks!

[@TomJones-tx7pb]

Why should a modern machine have a boiler at all?