Buying Checklist: The Fields That Decide Five-Year Cost
Most listings lead with boiler type and ignore what the machine costs to own. This checklist is built
from the fields that are actually published across 911 machines — and from the ones that are not.
How to use this checklist
Work through the five fields in order. The first two can be settled from a spec sheet; the last three need a dealer
call or a manufacturer email. If a seller cannot answer questions three to five, that is itself the answer.
1. Boiler type — verify it
328 of 911 models state a boiler type in the specification section or title. If a listing only
implies it, ask the manufacturer. Our first extraction pass mislabelled heat exchangers as dual boilers; the corrected
count is far lower and more honest.
2. Portafilter size
292 models publish a size, and 58 mm takes the clear majority. 54 mm and 51 mm limit aftermarket
baskets, tampers and bottomless portafilters.
3. Water source and plumbing
Reservoir-only versus plumbable changes where the machine can live. Only 88 models publish it, so
this is a question to ask the dealer, not a field to trust.
4. Serviceability
Ask for part numbers of the pump, the group gasket and the heating element. If the dealer cannot supply them, the
machine is disposable regardless of price.
5. The five-year math
Add the purchase price, a descaling service, a gasket set and one probable repair. On the dataset median of
$2,145 that is usually 15–25% of the sticker over five years — more than the difference
between adjacent models in the same range.
A ten-minute dealer call
Ask four questions and write the answers down: what pump is fitted and what a replacement costs; whether the group
gasket is a standard size; what a replacement heating element costs; and whether the machine can be descaled at home or
needs a service visit. The answers separate a machine you can own for a decade from one you replace in three years.
Red flags
- A price far below the category median with no explanation.
- “Dual boiler” claimed without a model number or spec sheet.
- No published replacement parts.
- Warranty that excludes the boiler.
What the data cannot answer
- Failure rates: not published anywhere public.
- Street prices: these are list prices, discounts vary by dealer.
- Build quality: specs are publisher statements, not teardown results.
FAQ
Is a dual boiler worth it for two drinks a day?
Rarely. The measured gap is about $1,700; at two drinks a day that buys convenience, not capacity.
Does a bigger boiler mean better coffee?
No. Temperature stability depends on the group and controller; boiler volume mainly affects recovery under load.
What should I ask that listings never answer?
Replacement pack price, pump part number, and whether the group gasket is a standard size.