How Big of an Ice Machine Does a Coffee Shop Need?

The question “how big of an ice machine does a coffee shop need” depends on your iced-drink volume, the machine’s output at your operating conditions, and how much ice its bin can hold. A machine can make enough ice over a day and still run dry during a rush.

This guide walks through the sizing math, labels vendor estimates, and compares six undercounter machines using their makers’ specifications.

Why real output runs below the sticker

The six maker sheets below publish output at ideal conditions of 70F ambient air and 50F incoming water, alongside lower output at 90F air and 70F water. If your shop and water are warmer than the ideal test conditions, the higher figure may overstate available production.

Per Scotsman’s 03-21 sheet, the UC2024MA-1 produces 227 pounds per day at 70/50 and 166 at 90/70. Manitowoc’s UDF0240A sheet gives 215 and 160; Scotsman’s 2018 UN324A-1 sheet gives 340 and 266. These are defined test points, not forecasts for your premises.

AHRI’s certification program verifies participating ratings through independent testing. A maker’s published 90/70 figure alone does not establish that a particular model is certified. ENERGY STAR qualification also requires certification; a family page or an archived logo is not evidence of current certification for every revision.

The sizing math, labeled

Here is a working estimate, with each rule of thumb attributed. These are vendor recommendations, not independently validated consumption data.

• Per customer: vendor KaTom lists 2.5 pounds per customer for a coffee/smoothie cafe. This covers a different scope from a per-drink estimate; do not treat the two as interchangeable.
• Per iced drink: vendor Naixer suggests roughly 0.3–0.5 pounds per iced drink, with about 0.3 for an iced latte, 0.4 for an iced Americano and more than 0.5 for blended frappés or smoothies. Those are its estimates, not measured results for your menu.
• Peak buffer: Naixer uses 20%; vendor IceMachinesPlus also recommends adding 20%, while KaTom suggests another 10 or 20%. A buffer is a planning assumption, not a standard or guarantee.

A worked example, clearly directional: a shop selling 200 iced drinks on a busy day at an assumed 0.4 pounds each needs 200 × 0.4 = 80 pounds; adding an assumed 20% gives 80 × 1.2 = 96 pounds for the day. Compare that demand with the machine’s output at relevant conditions, then check peak storage and recovery. Once you open, combine POS iced-drink counts with measured ice per drink, waste and other ice uses; counts alone do not measure pounds consumed.

Production versus bin: the buffer that gets forgotten

Daily production and bin capacity are different specs. In these six picks, storage ranges from about 23.5% to 50% of the stated 70/50 daily output, calculated from the maker figures below. For example, the UC2024MA-1 has an 80-pound bin and a 166-pound daily rating at 90/70; neither number says how much ice will be ready at a particular moment.

If a rush consumes more than stored ice plus replenishment, you can run dry even when daily production looks adequate. Use your measured demand pattern rather than assuming a morning peak. Scotsman’s sizing guide calls for hourly, daily and weekly demand; compare peak withdrawals, available storage and time to recover before the next rush.

The picks: undercounter ice machines for a coffee shop

Machine	Ice type	lb/24hr at 70/50 (per maker)	lb/24hr at 90/70 (per maker)	Bin (lb)	Width	Best for
Hoshizaki AM-50BAK	Top hat	54	35	27	14⅞ in	Low measured demand and a narrow cabinet
Scotsman UC2024MA-1	Medium cube	227	166	80	24 in	Medium cube with an 80-lb bin
Hoshizaki KM-231BAJ	Crescent cube	213	147	80	24 in	Crescent ice
Ice-O-Matic ICEU220FA	Full cube	238	165	74	24.54 in	Full cube in a shallower cabinet
Manitowoc UDF0240A	Full dice	215	160	90	26 in	Largest absolute bin among these picks
Scotsman UN324A-1	Nugget	340	266	80	24 in	A menu calling for chewable ice

Figures are per the linked maker sheets; “Best for” is selection guidance subject to measured demand and site fit. Scotsman’s 03-21 UC2024MA-1 sheet gives 166 lb at 90/70, matching its current maker figure. Its earlier 10-19 sheet gives 174 lb; no maker explanation for that revision is available here. The 03-21 UC sheet and 2018 UN sheet describe R134a generations, while current family pages describe R290. Confirm the exact revision offered rather than combining their specifications.

The products below were listed in stock on Amazon as of October 2026; availability can change. Confirm the exact model and electrical configuration before ordering. FranchiseFeast is a participant in the Amazon Associates Program. As an Amazon Associate I earn from qualifying purchases.

Narrowest cabinet among these picks

Hoshizaki AM-50BAK Undercounter Ice Machine

24-hr production

54 lb at 70F/50F; 35 lb at 90F/70F, per maker

Bin capacity

27 lb built-in bin, per maker

Ice type

Top-hat cube

Dimensions

14.875"W x 22.625"D x 33.5"H

Electrical, per maker

115V/60Hz/1 phase; 2.0A operating; 15A circuit/fuse

At under 15 inches wide, this has the smallest footprint among these picks. Check installation clearances as well as cabinet size. Its 35 lb at 90/70 and 27 lb bin limit the demand it can cover.

Specs: Hoshizaki AM-50BAK maker spec sheet, hoshizakiamerica.com

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Medium cube with an 80-pound bin

Scotsman UC2024MA-1 Undercounter Ice Machine

24-hr production

227 lb at 70F/50F; 166 lb at 90F/70F, per maker

Bin capacity

80 lb built-in bin, per maker

Ice type

Medium cube

Dimensions

24"W x 28.5"D x 39"H

Electrical, per maker

115V/60Hz/1 phase; 15A maximum fuse/breaker

Per the 03-21 maker sheet, output is 166 lb at 90/70; the earlier 10-19 sheet gives 174 lb. Neither is a guaranteed minimum. Check the offered revision and the 39-inch height against your installation.

Specs: Scotsman UC2024 maker spec sheet, 03-21, scotsman-ice.com

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Crescent-cube alternative

Hoshizaki KM-231BAJ Undercounter Ice Machine

24-hr production

213 lb at 70F/50F; 147 lb at 90F/70F, per maker

Bin capacity

80 lb built-in bin, per maker

Ice type

Crescent cube

Dimensions

24"W x 28"D x 39"H

Electrical, per maker

115V/60Hz/1 phase; 6.5A operating; 15A circuit/fuse

The 80 lb bin pairs with 147 lb at 90/70. Compare that output with measured demand; it is not a floor. These are BAJ specifications, not the newer BAK model.

Specs: Hoshizaki KM-231BAJ maker spec sheet, hoshizakiamerica.com

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Full cube with a 74-pound bin

Ice-O-Matic ICEU220FA Undercounter Ice Machine

24-hr production

238 lb at 70F/50F; 165 lb at 90F/70F, per maker

Bin capacity

74 lb built-in bin, per maker

Ice type

Full-size cube (7/8" cube)

Dimensions

24.54"W x 26.27"D x 39"H

Electrical, per maker

115V/60Hz/1 phase; 11.9A minimum circuit ampacity, not running draw

At 238 lb at 70/50, this has the highest output among the roughly 24-inch cube machines listed here. Its 74 lb bin is about 31.1% of that figure, the lowest ratio among these cube picks; the nugget UN324 has a lower ratio. Check peak storage and recovery separately.

Specs: Ice-O-Matic ICEU220 maker spec sheet, iceomatic.com

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Largest absolute bin among these picks

Manitowoc UDF0240A Undercounter Ice Machine

24-hr production

215 lb at 70F/50F; 160 lb at 90F/70F, per maker

Bin capacity

90 lb built-in bin, per maker

Ice type

Full dice cube

Dimensions

26"W x 28.5"D; 32.5" cabinet height + standard 6" adjustable legs

Electrical, per maker

115V/60Hz/1 phase configuration: 7A; 208–230V configuration also listed

The 90 lb bin is the largest absolute bin here, not the highest storage-to-output ratio. The 160 lb rating at 90/70 is not a worst-case guarantee. Nominal height with standard legs is 38.5 inches before leveling adjustments. The Amazon offer does not establish the electrical suffix; confirm it with the seller.

Specs: Manitowoc NEO maker spec sheet, exact UDF-0240A row, manitowocice.com

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Chewable nugget ice

Scotsman UN324A-1 Nugget Ice Machine

24-hr production

340 lb at 70F/50F; 266 lb at 90F/70F, per maker

Bin capacity

80 lb built-in bin, per maker

Ice type

Nugget

Dimensions

24"W x 28.5"D x 39"H

Electrical, per maker

115V/60Hz/1 phase; 9.5A total load

ENERGY STAR describes nugget ice as softer and chewable. Choose it for the ice form your menu needs, then measure consumption. Its 80 lb bin is about 23.5% of the 340 lb rating at 70/50, the lowest ratio among these six picks. These electrical specifications come from the archived 2018 sheet.

Specs: Scotsman UN324A-1 maker spec sheet, 2018, scotsman-ice.com

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These units are also sold through foodservice dealers, who handle installation; confirm installation service for your location with Hoshizaki distributors, Scotsman distributors, Ice-O-Matic representatives or Manitowoc dealers.

What you’ll keep buying

Cleaners, sanitizer and replacement filter cartridges belong in your operating supplies. The scoop/holder and initial filter system below are reusable equipment, not recurring purchases on a fixed schedule.

Reusable ice scoop and holder

San Jamar SI5000 Saf-T-Scoop & Guardian

Capacity, per CFS Brands

6–10 oz

Bundle, per maker

Scoop, Guardian holder with removable drainage cap, mounting tools

The holder provides a place to store the scoop between uses. Select its mounting location around the utensil-storage requirements applicable to your shop.

Specs: CFS Brands SI5000 page and San Jamar Saf-T-Scoop & Guardian specification

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The FDA Food Code 2022, 3-304.12 states: “During pauses in FOOD preparation or dispensing, FOOD preparation and dispensing UTENSILS shall be stored:” Its paragraph (E) reads:

(E) In a clean, protected location if the utensils, such as ice scoops, are used only with a food that is not time/temperature control for safety food; or

This is one permitted storage provision, not the whole section. The Food Code is a model code; confirm the requirements adopted by your local authority.

Maker-approved cleaners

Cleaner/descaler and sanitizer are separate products with different functions. Follow the manual for the exact machine and revision for dilution, handling, rinsing and sanitizing; these product choices do not replace those procedures.

Scale remover named in the selected Scotsman manuals

Scotsman Clear 1 Cleaner, 19-0653-01

Bottle

16 oz, per listing

Maker guidance

Clear 1 named in UC24 and UF424/UN324 manuals

Scotsman names Clear 1 for both selected machine families. Its UN324-family manual separately names NuCalgon IMS III sanitizer; use the appropriate model procedure.

Specs: Scotsman UC24 and UF424/UN324 service manuals; Amazon product listing

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For the Ice-O-Matic ICE series, Ice-O-Matic’s service manual recommends “a ‘nickel-safe’ cleaner such as Nu-Calgon or equivalent,” and separately names Nu-Calgon’s sanitizer. Nu-Calgon states that it does not authorize or endorse sales on public online marketplaces such as Amazon, so buy its Nickel-Safe Ice Machine Cleaner through an authorized HVAC or foodservice distributor.

Maker-specified cleaner/descaler

Manitowoc Ice Machine Cleaner 000005162

Cleaner part

000005162

Separate sanitizer

000005164, per Manitowoc

Manitowoc directs owners to use Manitowoc descalers and sanitizer. Its guidance includes undercounter 190\u2013310 cubers; follow the exact machine instructions rather than treating cleaner and sanitizer as interchangeable.

Specs: Manitowoc descaler and sanitizer guidance, manitowocice.com

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For the Hoshizaki models, the AM-50BAK and KM-231BAJ manuals name Hoshizaki Scale Away. Hoshizaki sells it through its distributors. Their sanitizer instructions differ, so use the manual for your model rather than transferring dilution instructions between them.

Water filtration and replacement cartridges

Ice-machine filter system

Everpure Insurice Single PF-i2000\u00b2, EV932421

Maximum flow, per Everpure

1.67 gpm

Capacity, per Everpure

9,000 gallons

Scale reduction, per Everpure

Reduces scale and clogging; claim based on Pentair testing

Application, per Everpure

Cubers up to 750 lb/day

Match flow, pressure, connections, water conditions and available space to your machine. The stated cuber capacity does not establish nugget-machine sizing or universal compatibility. The initial system is equipment; replacement cartridges are the recurring purchase.

Specs: Pentair Everpure EV9324-21 Insurice Single PF-i2000\u00b2 maker spec sheet

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Everpure’s sheet identifies the i2000² EV9612-22 replacement cartridge and EC210 EV9534-26 prefilter. Use its maintenance guidance rather than assuming a universal replacement interval. See the water filtration guide for background.

Putting the sizing together

Estimate daily demand from the labeled assumptions above, convert it to pounds, add your chosen buffer, then compare output at relevant operating conditions. Separately, check storage, peak withdrawals and recovery between rushes. Consider a modular head and separate bin if demand or storage exceeds these units, or if layout and service needs favor that arrangement. Several picks are 39 inches tall; an undercounter name does not establish fit beneath your counter.

Every unit here requires a water-supply connection. Have a licensed plumber and local water authority establish the applicable backflow protection and installation requirements. For example, ICC’s 2018 plumbing update discusses coffee machines and noncarbonated beverage dispensers at Section 608.17.1.2 with ASSE 1022, ASSE 1024 or an air gap; the 2024 New York plumbing code also lists ASSE 1032. Neither example establishes the code or device applicable to your ice machine. The espresso machine backflow preventer guide provides related background for that conversation.

The ice machine is one line on a longer equipping list, so pair this with the full coffee shop equipment list, the undercounter refrigerator guide, and the coffee shop startup cost calculator. Once you open, replace the assumptions with POS counts, measured ice use, waste and peak recovery data.