2 Group Coffee Machine

For a lot of cafes it is. Two groups is the small end for a cafe and three is what most venues buy, so the useful test is your busiest sixty minutes rather than your daily total. Count the drinks you expect in that hour, count how many of them are milk based, and count the pairs of hands you can put on the bar.

Two groups with one experienced barista will carry a solid morning comfortably, and with a dedicated milk person it'll carry a serious one. What it won't do is absorb a peak that never breaks, because once both groups and both wands are going there's nowhere left to go. If your queue is continuous from eight until ten, buy the third group. And if your trade is more of a steady trickle and you're on your own, a 1 group will do the same work in less bench.

Workflow, almost entirely. Take the full order before you start so you're texturing one jug for the whole table instead of three, keep one group extracting while you lock in the other, grind into the second basket while the first shot runs, and get cups, lids and saucers out during extraction.

The equipment around the machine supports all of that. A jug rinser saves a trip to the sink between milks, a second grinder means decaf never breaks the rhythm, and a knock box within a hand's reach saves a turn on every shot. None of it costs much next to the machine, and together it decides whether both groups keep pace through the rush or sit idle for half of it.

A compact two group gives you the same two group heads in a shorter and usually shallower body, and we have several. A lot of cafe benches simply can't give up the length a full size machine needs, especially once two grinders are up there as well.

A smaller body carries a smaller boiler, which means less thermal reserve for back to back extraction and less steam in hand when two jugs go on at once. For moderate volume, or a menu with a decent share of black coffee, that's a trade worth making. For a milk heavy bar with a hard peak, buy the full size body. Work out your peak first, then measure the bench and see which one fits.

Running double baskets you can have four shots extracting at once, which is far more espresso than one person can turn into finished drinks, so the real ceiling is milk and hands, meaning how many jugs you can texture and pour and how many people are pouring them.

One barista working both sides of a two group moves at a good clip because the work overlaps, and adding a second person on milk steps the same machine up again. At that point the groups stop being the limit and the boiler's steam capacity takes over, which is exactly where a compact body and a full size one separate. That's why the boiler question matters more on two groups than it does on one.

It's the clearance under the group head and it decides which cups will fit. High cup takes a tall takeaway cup straight under the group, so the shot goes into the cup the customer leaves with, while low cup has less room under there and suits ceramic on a saucer.

Decide it against the cups you actually use before you order, because it's awkward to change later. Pouring shots out of a glass into a takeaway cup costs you seconds on every drink and the espresso cools on the way across, so a takeaway heavy bar wants high cup. A sit-down room pouring into ceramic usually gets a tidier bar and a better working height out of low cup. We have both, in compact and full size bodies.

Plan the station rather than the machine. A working two group bar runs in one direction, so that's grinder, tamping space, machine, then a landing area where the finished drinks go out. The knock box wants to be within a hand's reach of the group rather than across the bar. If you run a house blend and a decaf you need room for two grinders, and that's usually what blows the measurement out.

Leave clearance behind the machine for the water and waste lines and for a technician to get at it. Check what's above it too, because a cup rail is only useful if the cups fit under the shelf. If two people are going to be on bar, walk the layout before you commit, since two baristas reaching for the same knock box will cost you more than any difference between the machines on your shortlist.

The same four things every espresso machine needs: power, mains water, a waste point and bench. Two group machines are plumbed through a filter and drained to waste, so both services have to be within reach of where the machine will stand before delivery day.

On power, ask us for the rating plate before you order. A plug fitted to the machine isn't proof it can share a circuit with the fridge, the toaster and the sandwich press, because an espresso machine draws hard every time the element cuts in. A lot of two group machines want their own circuit, so let your electrician tell you what the site can supply, and book them and the plumber for before the machine lands.

You can, and it's worth pricing it both ways. Our prices are sharp on new and refurbished machines. A refurbished machine can have scratches or dents picked up in transit, in the kitchen it worked in, or in handling, and every unit is inspected, tested and verified in working condition before it is relisted for sale, with the warranty terms shown on each product page.

Silverchef Rent-Try-Buy then lets you rent the machine rather than buy it up front, so the cash stays in the rest of the fit-out. The rental payments are treated as an operating expense, and you can buy the machine out later or move up to a bigger model as the business grows. That upgrade path is the useful part on two groups, because this is the size venues most often outgrow.

A heat exchanger machine runs one boiler of steam water with the brew water drawn through it, and it's compact, proven and recovers steam well. The cost is brew water overheating while the machine idles, though flushing the group before the first shot after a quiet spell handles that.

A twin or multi boiler holds the brew water and the steam water separately, so the brew temperature stays where you set it even while both wands are working, which keeps shots consistent through a rush. There's more to warm up and more to maintain, but if your peak is short, sharp and mostly milk, most people find it worth the money.

Cleaning and water account for most of it. Backflush both groups with a blind basket and detergent at close, soak the baskets and portafilters, and wipe and purge each steam wand every time it touches milk, because dried milk inside a wand starts as poor texturing and ends as no steam at all. Change the filter cartridge on a set date too, since scale in the boiler is a maintenance failure rather than a warranty claim.

Group gaskets harden with heat and start to weep around the portafilter, which is a cheap consumable rather than a breakdown, and shower screens block with fines and get changed at the same service. Keep an eye on the grinder as well. Burrs dull over tonnes of coffee, and if you're grinding finer month after month to hold the same shot time that's worn burrs rather than bad beans. Replacements are with the commercial coffee grinders.