Ice bin sizing for modular commercial ice machines
A modular ice machine is two SKUs: a head that makes ice and a bin (or dispenser) that stores it. The brochure “up to 500 lb” number is pounds harvested in 24 hours, not pounds sitting in the cabinet when the dinner rush starts. Pairing a large head with a leftover undercounter bin is how the machine shuts off at 2 p.m. and the well is empty at 6:40.
This is a planning page from published dealer / OEM application copy and current public sheets. It is not a dealer quote, not a review, and not a health-code opinion. Confirm compatibility, adapter kits, electrical, plumbing, clearance, and sanitation with the people who inspect the building.
Daily production math lives on how to size a commercial ice machine. Form-factor background: undercounter vs modular vs countertop.
Production vs storage (two different numbers)
| Spec | What it measures | What it does not measure |
|---|---|---|
| Production (lb / 24 h) | How much ice the head can harvest in a test day. “Up to” is usually 70°F air / 50°F water. Many sheets also print 90/70 | How much ice is on hand at 5:30. How much you can scoop without bridging. Whether the kitchen is actually 70/50 |
| Bin / hopper storage (lb or ft³) | How much finished ice the bin is rated to hold. Modular heads are sold head only | Daily make. A 500 lb head does not include a 500 lb bin |
| Usable / scoopable ice | What staff can actually pull before the pile hits the shutoff or bridges | The printed application-capacity number, one-for-one |
Atlantic Store Equipment’s sizing guide (dated Jul 15, 2026) puts it in one sentence: size the machine for a realistic peak day, then size the bin around the largest service period, because lb/24 hr is not the amount of ice the system can hold. IceMachinesPlus (dated Jul 8, 2026) says the same split: production is the 24-hour make; the bin is how much finished ice sits there at once. On a modular setup those are two purchases.
The directory modular pages already mark storageLbs as empty for that reason: Hoshizaki KM-520MAJ, Manitowoc IYT0450A, Ice-O-Matic CIM0430A, and Scotsman C0330MA-1 are heads. Order a bin from the compatibility list on the current sheet.
An undersized bin throttles a larger head
When the bin is full, the ice maker stops until someone removes ice. That is the normal bin-control behavior, not a defect.
- Atlantic: a modular machine rated 600 lb / 24 h on a 350 lb bin can make its rated daily output only if ice is removed; at any moment only about 350 lb is stored. When the bin is full, production pauses.
- IceMachinesPlus: pair an 800 lb head with a 350 lb bin and you throttle the head. You never see the spec-sheet daily output if the bin fills and sits.
- The Kitchen Spot: bins that are too small “will not allow you to benefit from the full production capacity of your ice maker.” Ice that piles into a peak can trip the shutoff while there is still empty space around the mound. Their copy says to expect about 10–20% less than the specified bin pounds for that reason.
A bigger head does not fix a dinner-rush bin. If the leftover is empty at 6:00, the machine is only making whatever it can harvest during that window.
Size the bin around the largest service window
The machine replaces ice all day. The bin covers the hours when withdrawal is faster than harvest. Atlantic’s planning formula:
Bin capacity needed = ice used during the largest service window − ice produced during that window + opening safety stock
Their published restaurant example: 240 lb used in a three-hour dinner rush on a 600 lb/day machine. They divide 600 by 24 to get a theoretical 25 lb/hour, so three hours of make is 75 lb. Shortfall during the rush is 165 lb. They add 75 lb opening safety stock and call the minimum calculated usable storage 240 lb. Then they say to move to a larger practical bin and treat nominal pounds as not perfectly scoopable inventory — ice can bridge or pile unevenly.
That hourly split (24-hour rating ÷ 24) is arithmetic, not an OEM hourly guarantee. Harvest is cyclic. A boxed-in alcove will not even give you the 90/70 column. See how to size and air-cooled vs water-cooled.
Koller Ice Maker’s seasonal-peak article uses the same shape: highest short-term demand − production during that period + reserve stock. NORIOTA’s commercial sizing guide writes it as peak-period draw − expected production during the peak + reserve ice, and estimates peak-period production as daily capacity ÷ 24 × hours. Those are dealer / buyer-guide worksheets, not a warranty.
Published planning ranges (sources disagree)
When you do not have an hourly log, the published shortcuts are ranges, not one magic percent. Charts also disagree on whether the percent is of daily production or of peak-day demand.
| Source | Published bin / storage shortcut | What they are talking about |
|---|---|---|
| Atlantic Store Equipment | 40–50% of daily production as a starting point for relatively even restaurant demand | When hourly records are unavailable. Calculate from the actual service window whenever you can |
| Atlantic Store Equipment | 50–70% of peak-day demand | Intense rush, banquets, bagging, or limited overnight recovery. Planning range, not a single number |
| IceMachinesPlus | About 40–50% of the machine’s 24-hour production for steady all-day use; larger if demand spikes in one part of the day | Also says many operators size the bin to roughly peak single-day demand so the head can build a reserve overnight |
| NORIOTA | About 30–40% of daily demand may be workable for steady demand | Storage target, not a lab measurement |
| NORIOTA | 40–60% for restaurants with heavy rush periods; 60–100% or more for bars, hotels, and event-heavy operations | Depends on how concentrated the pull is |
| The Kitchen Spot | Bin 10–20% larger than daily make (example: 700 lb bin on a 600 lb maker) | Different method: they want surplus storage so the pile-up / shutoff loss does not cut you short. They also say a bin twice daily make is usually a bad idea — unused ice melts and the bottom can stagnate |
| The Kitchen Spot | Exception: one- or two-day-a-week use (church, event center, music venue) | Their example: a 200 lb maker on a 700 lb bin, because the bin has days to refill. That is the church pattern, not a Tuesday restaurant |
| VenueIce sizing page (existing line) | “A bin that holds 60–80% of a day’s make is a common planning range” | Older compiled sentence on how to size. It sits inside the Atlantic / IceMachinesPlus / NORIOTA spread; use the cited sources on this page rather than treating 60–80% as a third invented rule |
Read that table as a spread, not an average. Steady all-day demand often lands in the 30–50% band (NORIOTA 30–40%; Atlantic / IceMachinesPlus 40–50% of production). Rush-heavy restaurant, bar, banquet, bagging, or event work is published higher — Atlantic 50–70% of peak-day demand, NORIOTA 40–60% (restaurant rush) up to 60–100%+ (bar / hotel / event), IceMachinesPlus “larger than 40–50%,” Kitchen Spot ~110–120% of daily make for a daily-turnover plant. We do not invent a VenueIce percent in the middle.
A catering commissary that bags every weekend is a daily plant — do not copy the church sit-all-week exception onto it. A school cafeteria or gym lunch / practice window is a rush-bin job even when the 24-hour rating looks fine.
Rated pounds, cubic feet, and “usable” capacity
Manufacturers do not all mean the same thing by “300 lb bin.”
- Hoshizaki B-series pages we opened print application capacity = internal volume × 30 lb/ft³. B-300SF: 300 lb from 11.51 ft³. B-500SF: 500 lb from 16.33 ft³. B-700SF: 700 lb from 24.77 ft³. Heights on those pages include 6″ legs. Top kits are sold separately.
- Manitowoc D-bin sheets print application capacity = 90% of volume × 33 lb/ft³ and the note “ice must be managed.” Current OEM copy we opened: D400 365 lb, 30″ × 34″ × 38″ including 6″ legs; D570 532 lb, 30″ × 34″ × 50″ including 6″ legs. The same family sheet also prints 2018 AHRI capacity in cubic feet (D400 12.3 ft³; D570 17.9 ft³).
- Scotsman current product page for B330P / B530P / B530S: B330P up to 344 lb, 30″ × 34″ × 31″ (add 6″ for legs); B530P / B530S up to 536 lb, 30″ × 34″ × 44″ (add 6″ for legs). Dealer reprints sometimes label 344 / 536 as application capacity and print a lower AHRI pound figure — treat application vs AHRI as labeled / confirm the current sheet.
- AHRI Standard 820 (ice storage bins) historically defined theoretical storage capacity as internal volume × 80% × 30 lb/ft³. A later addendum (KaTom’s learning-center summary of the January 2018 change) moved the certified bin rating toward measured internal volume in cubic feet, measured to the device that decides the bin is full. AHRI’s current ice-storage-bin certification materials still list measured internal volume and theoretical storage effectiveness (%).
- Theoretical storage effectiveness on the older ARI 820 text is the fraction of ice expected to remain after 24 hours under a standard hold test (ambient about 90°F, ice about 32°F). That is an insulation / melt metric. It is not “what percent of the sticker pounds you can scoop at 5:30.”
Kitchen Spot’s 10–20% less than specified (mound hits the shutoff) and Atlantic’s “nominal pounds are not perfectly scoopable” are the buyer-guide usable-capacity sentences we have. We do not invent a third “always use 80%” rule. If two labels disagree (application lb vs AHRI ft³ vs AHRI lb), prefer the latest OEM page or PDF and say which number you used.
Width and compatibility
Heads and bins must match brand, width, and the adapter / top kit on the current sheet. A 22″ head does not drop onto a 30″ or 44″ lid without the kit the manufacturer lists. A wider head does not sit on a narrower bin.
| Head in this directory | Head width | Compatible-bin language we actually opened | Do not assume |
|---|---|---|---|
| Hoshizaki KM-520MAJ | 22″ | Product page: bins B-250 through B-1300 and DB/DM dispensers. Same-width B-300SF is 22″. Two slim heads side by side is a documented Hoshizaki layout | That a 22″ head bolts to a 30″ B-500SF or 44″ B-700SF without the top kit on the bin sheet |
| Manitowoc IYT0450A | 30″ | URI listing already cited on that directory page suggests D400 / D570 and marks the head not stackable | A Hoshizaki or Scotsman lid. Confirm adapter if you mix series |
| Ice-O-Matic CIM0430A | 30.25″ | Cited CIM0430 PDF: B25 through B1660. Dual exhaust; 6″ intake/exhaust clearance on that PDF | Capacities for every B-series SKU — we did not extract a full Ice-O-Matic bin table here. Open the current bin sheet |
| Scotsman C0330MA-1 | 30″ | Circulated copy already on that directory page includes B330 / B530. Current Scotsman B330/B530 page is 30″ wide | A 22″ Hoshizaki lid. Confirm the bin-top kit on the C0330 sheet |
Stack height is head + bin + legs. A 22″ × 28″ KM-520MAJ on a 46″ B-300SF is a different hole than a 21.5″ IYT0450A on a 50″ D570. Measure the door, the drain, and the scoop side. See undercounter vs modular vs countertop.
Worked examples (directory heads + published bins)
Use only production numbers already on the directory pages or the OEM/dealer sheets those pages cite. 90/70 is the kitchen column when the sheet has one. Hourly make = that column ÷ 24. That is planning arithmetic.
Atlantic’s 240 lb / three-hour dinner-rush pull, plus their published 75 lb opening safety stock, against heads in this directory:
| Head | Column used | Theoretical make in 3 h | 240 − make + 75 lb stock | Bin class already cited on site |
|---|---|---|---|---|
| Scotsman C0330MA-1 | 288 lb AHRI @ 90/70 | 288 ÷ 24 × 3 ≈ 36 lb | ≈ 279 lb usable | B330P 344 lb application (30″) covers that paper number if the bin is full and scoopable. B530 536 lb is the larger 30″ leftover |
| Ice-O-Matic CIM0430A | 320 lb @ 90/70 on the Webstaurant CIM0430 PDF. A 2025 depot reprint is already flagged as 310 lb — treat 90/70 as labeled / uncertain | 320 ÷ 24 × 3 ≈ 40 lb (310 ÷ 24 × 3 ≈ 39 lb) | ≈ 275–276 lb | Head only; B25–B1660 on that PDF. We do not invent a B-series pound figure. Compare the current Ice-O-Matic bin sheet to ~275 lb usable |
| Manitowoc IYT0450A | 378 lb AHRI @ 90/70 already on that directory page | 378 ÷ 24 × 3 ≈ 47 lb | ≈ 268 lb | D400 365 lb application covers the paper rush if actually usable. D570 532 lb matches Kitchen Spot’s “10–20% larger than daily make” idea on a ~450 lb 70/50 head |
| Hoshizaki KM-520MAJ | ~556 lb @ 70/50 on the current product page. 90/70 not on that HTML — do not invent a kitchen column | 556 ÷ 24 × 3 ≈ 70 lb at 70/50 only | ≈ 245 lb at 70/50 arithmetic | Same-width B-300SF 300 lb. A hot kitchen will make less than 70 lb in three hours; the 245 lb paper number gets worse. B-500SF 500 lb is 30″ (top kit). B-700SF 700 lb is 44″ (top kit) |
A 240 lb three-hour pull is not this site inventing restaurant demand. It is Atlantic’s own example. Your dining room may be smaller. An 80-cover restaurant on the 1.5 lb line is 120 lb for the day before bar and display — the bin question is still how much of that day hits one window.
Steady vs rush, same ~400 lb head. Take the Scotsman C0330MA-1 400 lb @ 70/50 / 288 lb @ 90/70:
- Atlantic / IceMachinesPlus 40–50% of production: 0.40–0.50 × 400 ≈ 160–200 lb at the 70/50 sticker, or 0.40–0.50 × 288 ≈ 115–144 lb if you apply the percent to the 90/70 column. NORIOTA’s 30–40% of daily demand is in the same neighborhood if demand ≈ production.
- Atlantic 50–70% of peak-day demand on a 288 lb kitchen day: 144–202 lb.
- Kitchen Spot 10–20% larger than daily make on 400 lb: 440–480 lb → B530 / D570 / B-500 class, not a 300 lb leftover.
- IceMachinesPlus “roughly peak single-day demand”: if the peak day is 288–400 lb, they are telling you to shop a bin in that band.
Those answers disagree on purpose. We show the methods. We do not average them into a new pound number.
Church / event leftover (Kitchen Spot exception). Kitchen Spot’s one-or-two-days-a-week example is a 200 lb maker on a 700 lb bin. This directory does not carry a 200 lb modular cube head. The closest storage class already cited on the church and catering pages is Hoshizaki B-700SF 700 lb, 44″. A KM-520MAJ on that lid needs the top kit. Do not park a week of ice in a sealed bin on a restaurant that turns the leftover every day.
Undercounter leftover is not a modular bin. Largest built-in bin in this directory is 90 lb (Manitowoc UYF-0140A / UYF-0190A). A 240 lb dinner-rush pull does not fit it. That is when Atlantic, GoFoodservice, and HVACDirect tell you to leave undercounter class — see undercounter vs modular.
Current modular heads (OEM / directory sheets)
Figures are manufacturer ratings already cited on each directory page. Street prices omitted. Pair each head with a bin from its compatibility list.
| Model | Ice | Cited make | Cabinet / power | Bin note |
|---|---|---|---|---|
| Hoshizaki KM-520MAJ | Crescent | ~556 lb (“approximately” / “up to 556”). 90/70 not extracted from that HTML | 22″ × 27.375″ × 28″; 115 V hardwire, 10.6 A, 20 A max fuse; 7,000 BTU/h | B-250–B-1300 on the page. ENERGY STAR stated. Slim-line |
| Manitowoc IYT0450A | Half-dice | 490 lb @ 70/50; 378 lb AHRI @ 90/70 | 30″ × 24–24.5″ D × 21.5″; 115 V, MCA 11.9 A, 20 A max fuse. Cord vs hardwire: confirm the current sheet | URI copy: D400 / D570; not stackable on that listing. R410A |
| Ice-O-Matic CIM0430A | Half cube | 435 / 320 lb on the Webstaurant CIM0430 PDF. 2025 reprint 310 lb @ 90/70 already flagged | 30.25″ × 24.25″ × 21.25″; 115/60/1; min. circuit 11.0 A, 15 A fuse; 5,100 BTU/h | B25–B1660 on that PDF. ENERGY STAR mark. Water-cooled CIM0430W is a different water-use story |
| Scotsman C0330MA-1 | Medium cube | 400 / 288 lb (70/50 and AHRI 90/70) | 30″ × 24″ × 23″; 115/60/1, 14.3 A. Often hardwired — confirm the current sheet | ENERGY STAR on that listing. Common bins in circulated copy: B330 / B530 |
Hoshizaki bins already cited on the restaurant, church, catering, and gym pages:
| Bin (current OEM page) | Application capacity | Width × depth × height | Why it shows up here |
|---|---|---|---|
| B-300SF | 300 lb (11.51 ft³ × 30 lb/ft³) | 22″ × 32.5″ × 46″ | Same width as KM-520MAJ. Covers Atlantic’s ~240–245 lb paper rush only if the bin is actually full and usable. 3/4″ FPT drain |
| B-500SF | 500 lb (16.33 ft³) | 30″ × 32.5″ × 46″ | Kitchen Spot 10–20% larger than a 400–450 lb day. 22″ head needs the top kit |
| B-700SF | 700 lb (24.77 ft³) | 44″ × 32.5″ × 46″ | Kitchen Spot’s weekend 700 lb leftover example. A 22″ KM-520MAJ needs the top kit |
A dispenser hopper is not a dump bin. Scotsman HID525 current page: 500 / 380 lb make, 25 lb hopper. That is a hotel / break-room chute, not a 240 lb dinner leftover. See hotel and ice dispenser vs ice bin.
What this page is not
- Not a replacement for the lbs/day table. Guest, seat, room, and cup factors stay on how to size and the venue pages.
- Not a form-factor explainer. Built-in vs head-plus-bin vs countertop stays on undercounter vs modular vs countertop.
- Not a single invented percent. Published shortcuts span roughly 30–50% (steady) through 40–80%+ (rush / event) and Kitchen Spot’s 110–120% daily-make rule. We cite the range. We do not pick a VenueIce winner.
- Not a health-code letter. Ice in a glass is food. Follow the clean/sanitize interval on the machine sheet. We are not writing a health-department opinion.
- Not a review or a price list. No scores, no invented “we ran this bin for N services.”
- Not a mixed-brand adapter catalog. Use the kit on the current sheet.
Sources
- Atlantic Store Equipment, Commercial Ice Machine Sizing Guide — production vs storage; full-bin shutoff on a 600 lb head / 350 lb bin; bin formula peak-window use − make during the window + opening safety stock; 240 lb / 3-hour dinner-rush example; shortcuts 40–50% of daily production (even restaurant) and 50–70% of peak-day demand (rush / banquet / bagging); nominal pounds not perfectly scoopable. Dated Jul 15, 2026 (retrieved 2026-09-12).
- IceMachinesPlus, How To Size a Commercial Ice Machine by Daily Output and Bin Size — production vs bin as two modular purchases; 40–50% of 24-hour production for steady use, larger for a single rush; 800 lb head on a 350 lb bin throttles output; bin should cover the busiest demand period. Dated July 8, 2026 (retrieved 2026-09-12).
- NORIOTA, Commercial Ice Machine Sizing Guide — required storage = peak-period draw − production during the peak + reserve; steady 30–40% of daily demand; restaurant rush 40–60%; bars / hotels / events 60–100% or more (retrieved 2026-09-12).
- The Kitchen Spot, Ice Machines: Sizing for Application — bin usually 10–20% larger than daily make (700 lb bin on a 600 lb maker); expect 10–20% less than specified because the mound trips the shutoff; bin twice daily make “not advisable”; church / one-or-two-days-a-week exception (200 lb maker on a 700 lb bin) (retrieved 2026-09-12).
- Koller Ice Maker, How to Size Ice Production Machines for Seasonal Peak Demand — required bin = highest short-term demand − production during that period + reserve stock; plan for usable, not only nominal, capacity (retrieved 2026-09-12).
- KaTom, Ice Bin Capacity Ratings — AHRI “theoretical storage capacity” in pounds vs the 2018 move to measured internal volume in cubic feet, measured to the full-bin control (retrieved 2026-09-12).
- AHRI / ARI Standard 820 language in public circulation (ARI 820-2000 text; AHRI ice-storage-bin certification materials) — theoretical storage capacity historically volume × 80% × 30 lb/ft³; theoretical storage effectiveness as a 24-hour hold percentage under about 90°F ambient; current certified data include measured internal volume and theoretical storage effectiveness. Certification overview: AHRI Automatic Commercial Ice-Makers and Ice-Storage Bins (retrieved 2026-09-12).
- Manitowoc, D-Style ice storage bins spec — application capacity 90% × 33 lb/ft³; D400 365 lb, 30″ × 34″ × 38″; D570 532 lb, 30″ × 34″ × 50″; 2018 AHRI 12.3 / 17.9 ft³; heights include 6″ legs (retrieved 2026-09-12).
- Scotsman, B330P, B530P, B530S product page — B330P up to 344 lb, 30″ × 34″ × 31″ plus 6″ legs; B530P/S up to 536 lb, 30″ × 34″ × 44″ plus 6″ legs (retrieved 2026-09-12).
- Hoshizaki, B-300SF, B-500SF, and B-700SF product pages — 300 / 500 / 700 lb application capacity; 22″ / 30″ / 44″; volume × 30 lb/ft³; top kits sold separately (retrieved 2026-09-12).
- Hoshizaki, KM-520MAJ product page — ~556 lb, 22″ × 27.375″ × 28″, 115 V hardwire, compatible B-250–B-1300 (retrieved 2026-09-12).
- Directory pages already citing the same OEM language: KM-520MAJ, IYT0450A, CIM0430A, C0330MA-1.
If two sheets disagree, we say so and prefer the latest OEM page or PDF.