Quick answer: Size your espresso machine for your busiest hour. Most neighborhood cafés choose two groups, high-volume shops choose three, and low-volume operations may use one. Then decide on volumetric controls, boiler type and size, steam power, and power and water requirements. Finally, make sure a qualified technician can service the brand locally, and test the machine before you buy.
Key takeaways
- Groups = how many shots at once. Match it to baristas at peak, not average sales.
- Steam power and boiler size matter as much as groups for milk-heavy menus.
- Plan electrical, water and drain requirements before you buy.
- Local service and parts availability can matter more than brand prestige.
Start with your peak hour
Estimate how many espresso drinks you'll make in your single busiest hour, and how many baristas will be pulling shots at the same time.
| Peak hour (espresso drinks) | Typical choice | Why |
|---|---|---|
| Low (occasional espresso, restaurants, kiosks) | 1 group | Saves space and cost |
| Moderate (typical neighborhood café) | 2 groups | Two baristas or one fast barista with a backup group |
| High (busy downtown, drive-thru, multi-barista) | 3 groups | Keeps multiple baristas working without waiting |
Tip: a two-group machine with strong steam and a separate hot water tower often outperforms a three-group machine with weak steam on a latte-heavy menu.
The features that matter
Boiler design
- Heat exchanger: one steam boiler heats brew water through a heat exchanger. Proven and economical; temperature can drift under heavy use.
- Multi-boiler / dedicated brew boilers: separate boilers (sometimes one per group) for brew and steam. Better temperature stability; higher cost.
Volumetric vs. semi-automatic
Volumetric machines stop shots automatically by water volume, making shots more consistent across baristas and freeing hands for milk. Semi-automatic machines give baristas manual control. Many cafés prefer volumetric for speed and training.
Steam power
Milk drinks dominate most U.S. menus. Ask about steam boiler size, recovery time and how many wands can run at full power simultaneously.
Hot water
A dedicated hot water tap or separate tower keeps americanos and tea from stealing steam and brew capacity.
Controls and data
Some machines offer shot timers, programmable temperature, counters and service alerts. Useful for training and maintenance scheduling.
Energy features
Eco modes and scheduled on/off timers help control energy use. ENERGY STAR lists commercial coffee brewers among its rated food service categories; for espresso machines, ask the manufacturer about standby and eco settings.
Infrastructure: power, water, drains
Before you order, confirm with your electrician and plumber:
- Electrical: voltage, amperage and dedicated circuit per the spec sheet
- Water line: pressure and a dedicated feed with shutoff
- Filtration: matched to your water and the manufacturer's requirements. The SCA's brewing water targets about 150 mg/L total dissolved solids with no chlorine. See our water filtration guide.
- Drain: with any air gap your local code requires
- Counter: depth, height and weight capacity; room for knock box and grinders
Budget beyond the machine
| Item | Why |
|---|---|
| Grinders (often two) | Espresso quality depends on the grinder as much as the machine |
| Water filtration | Protects the machine and warranty |
| Installation | Plumbing, electrical, calibration |
| Service plan | Preventive maintenance beats emergency calls |
| Spare parts | Gaskets, screens, blind baskets |
| Training | Your team needs to dial in and clean correctly |
New, used or leased
New machines bring warranties and current technology. Used machines can save money but need a technician's inspection. Leasing preserves cash but read the service and buyout terms. Whichever you choose, confirm a local technician can service it and that parts are available quickly.
Test before you buy
Visit a café or showroom using the model you're considering. Pull shots, steam milk back-to-back, and ask the owner about reliability and service. The SCA is also developing standards for fully automatic espresso machines, a sign of how much performance testing matters.
Next steps
Use our complete equipment checklist to plan the rest of the bar, and build cleaning into day one with our espresso machine cleaning guide.
Equip the rest of the bar
Affogato Bean supplies branded cups, sleeves, lids and packaging, and can help source equipment as you build out. See products or talk to us.
Frequently asked questions
How many groups does a coffee shop espresso machine need?
It depends on peak-hour volume and how many baristas pull shots at once. Many neighborhood cafés use two groups. Very busy shops, drive-thrus and bars with multiple baristas often use three. Low-volume kiosks or restaurants may manage with one.
What is the difference between volumetric and semi-automatic espresso machines?
Semi-automatic machines rely on the barista to start and stop the shot. Volumetric machines stop automatically after a programmed water volume, which improves consistency and frees baristas to steam milk.
What power does a commercial espresso machine need?
Many commercial machines need a dedicated higher-voltage circuit, and requirements vary by model and boiler size. Check the manufacturer's spec sheet with your electrician before installation.
Should I buy a new or used espresso machine?
New machines offer warranties and current technology. Used or refurbished machines can save money but should be inspected by a qualified technician, and you should confirm parts and service availability.
Sources
- Specialty Coffee Association, “SCA Standards.”
- Vixxo, “What Water Quality Does Coffee and Specialty Beverage Equipment Need?.”
- ENERGY STAR (EPA), “ENERGY STAR Commercial Food Service Equipment.”
Sources checked October 2026. Statistics are reported as published by each source.