Hoshizaki KM-622MAK 22-Inch Air-Cooled Crescent Cube Ice Machine Head - 673 lb/Day

Quick Answer

The Hoshizaki KM-622MAK is a 22-inch air-cooled modular ice machine head that produces individual crescent cubes. Hoshizaki rates it at 673 lb per 24 hours at 70°F air and 50°F water, and at 540 lb per 24 hours under the AHRI Standard 810 conditions of 90°F air and 70°F water. It is a head only, so it holds no ice and must be installed on a compatible Hoshizaki storage bin or dispenser purchased separately. It fits restaurants, bars, cafés, hotels and healthcare kitchens that need high output from a narrow equipment line. Its most important constraint is installation: the KM-622MAK is hardwired at 115V and drains by gravity, with no drain pump.

Hoshizaki KM-622MAK At a Glance

Who Should Buy the Hoshizaki KM-622MAK?

The KM-622MAK earns its place when floor space is the binding constraint and ice demand is not. A 22-inch cabinet delivering a 540 lb AHRI-rated day is a high output-per-inch ratio, and it is why this machine ends up in tight back-of-house runs where a 30-inch head will not fit between a wall and a prep table.

It suits full-service restaurants running lunch and dinner covers, bars filling glasses through a long evening, hotel kitchens supplying both food service and guest floors, and healthcare or senior-living kitchens where crescent cube works for beverages and patient trays alike. Offices and convenience stores with lighter draw are usually better served by a smaller self-contained unit, since the KM-622MAK produces more ice than they will use and still requires a separate bin.

Crescent cube is a general-purpose shape: it displaces liquid well in a glass, packs without bridging in a bin, and is durable enough for blended drinks and buffet display. If you need chewable nugget for a healthcare tray line or clear gourmet cubes for a cocktail program, ice type rather than output should decide the model. Note too that this is a modular head, not an all-in-one appliance — Ice Maker Supply’s explainer on self-contained versus modular ice machines covers what changes in cost, service access and installation when the machine and the storage are split.

Who Should Consider Another Model?

Four situations should push a buyer toward a different machine rather than this one.

• You cannot accommodate a hardwired connection. The KM-622MAK is hardwired at the site and ships without a cord or plug, so a licensed electrician and a dedicated 20 A circuit are part of the project — a cost easily missed when comparing sticker prices.

• You have no floor drain within reach. The machine drains by gravity through a minimum 3/4 in. hard pipe, with a 1/4 in. per foot fall on horizontal runs and a minimum 2 in. air gap above the floor drain. No drain pump is built in. An island bar with no drain below it is a blocker, not an inconvenience.

• You need less than roughly 250 lb a day. Running a 540 lb machine at a fraction of capacity means paying for output you never harvest, plus a separate bin. A self-contained undercounter unit with integral storage is cheaper and simpler.

• Your application calls for a different ice shape. Crescent cube is wrong for a nugget-led healthcare tray line, a flake-ice seafood display, or a bar built around large clear cubes.

Two secondary constraints are worth checking. The KM-622MAK is approved for indoor use only and will not operate at sub-freezing temperatures, so an unheated garage or exterior alcove is out. And because the condenser rejects 8,400 BTU/hr into the room at AHRI conditions, a hot, poorly ventilated closet will both cut ice output and add load to the building’s cooling.

Maximum Output vs Real-World Production

Two production numbers appear on almost every listing for this machine, and they are not interchangeable. The larger is a catalog maximum measured under favorable laboratory conditions; the smaller is the AHRI-certified rating, measured under conditions closer to a working kitchen. Sizing a bin or a shift against the maximum is the most common mistake buyers make with modular heads.

The gap between the two published figures is 133 lb per 24 hours, or approximately 20 percent of the maximum. Hoshizaki publishes only these two data points for the KM-622MAK, so any figure quoted for an intermediate condition — 80°F air, for example — is an interpolation rather than a manufacturer specification. Plan around 540 lb and treat anything above it as headroom.

What moves production up or down

• Ambient air temperature. An air-cooled condenser rejects heat into the room it stands in, so the warmer that room, the longer each freeze cycle takes. The machine is rated for 45–100°F ambient, but output falls steadily across that range.

• Incoming water temperature. Water entering at 70°F carries more heat to remove than water at 50°F, and long uninsulated supply runs through a hot kitchen raise inlet temperature measurably.

• Ventilation and clearance. Hoshizaki specifies 6 in. at the rear, both sides and the top. Boxing the machine in recirculates its own warm discharge air through the condenser.

• Water quality and scale. Mineral scale insulates the evaporator, lengthening freeze time and shrinking harvest. Hard water is the usual cause of a machine that quietly loses output over a season.

• Air filter condition and cleaning interval. The KM-622MAK uses removable air filters; a blocked filter has the same effect as poor clearance, and a machine overdue for descaling makes less ice long before it shows a fault.

Ice Maker Supply’s article on how hot kitchens affect commercial ice machine production goes into the ambient-temperature relationship in more detail. Daily production cannot be guaranteed for any installation; treat the AHRI figure as the planning number and verify actual harvest after commissioning.

Choosing the Right Storage Bin for the KM-622MAK

The KM-622MAK is an ice-making head and holds no ice. Every installation needs a Hoshizaki storage bin or dispenser, purchased separately — which makes cross-retailer price comparison misleading unless you check what is in the box. A listing bundling this head with a 300 lb bin will always look more expensive than a head-only listing, and is not.

Hoshizaki’s current specification sheet lists these as compatible: B-250SF, B-300SF, B-500SF, B-700SF, B-800SF, B-900SF, B-1150SS, B-1300SS, DB-130H, DB-200H and DM-200B. Ice Maker Supply lists several individually.

Price checked on September 10, 2026. Prices and availability may change; confirm current bin stock before ordering. Budgeting note: the KM-622MAK head at $5,460.00 plus a B-300SF at $1,555.00 puts a complete 22-inch machine-and-bin package at $7,015.00 before freight, installation and filtration.

Does the head need a top kit?

When head and bin share the same 22 in. width, they stack directly. When a 22-inch head sits on a wider bin, Hoshizaki’s application matrix specifies a top-kit arrangement to close the gap and support the head. The installation manual also warns that a top kit must not obstruct the bin control lens sensing area, or the icemaker will not run correctly. Confirm the exact kit for your pairing rather than assuming one is included.

R290 note that affects bin choice: because the KM-622MAK carries a 5.3 oz. charge of R290 hydrocarbon refrigerant, Hoshizaki’s installation manual specifies that it be used on a bin without electrical components, or one designed for use with flammable refrigerants. This rules out casually pairing the head with an unlisted or third-party bin that has powered components.

Sizing the bin against real demand

Storage capacity and daily production answer different questions. Production is how much ice arrives across a full day; storage is how much is available at one moment. A 300 lb bin under a machine rated at 540 lb per 24 hours does not let you draw 540 lb at once.

The arithmetic is simple. At the AHRI-rated 540 lb per 24 hours, average replenishment is 540 ÷ 24 = 22.5 lb per hour, assuming continuous running and that the bin control has not shut the machine off because the bin is full. A B-300SF full at opening therefore supports roughly 300 lb immediately plus about 22.5 lb for each hour the peak lasts — around 390 lb across a four-hour rush, around 435 lb across six. If your busiest stretch draws more than that, step up to the B-500SF rather than assuming the 540 lb figure covers it.

One dimension check that catches people out: the head is 28 in. tall and the B-300SF is 46 in. tall, so the assembled machine stands about 74 in. high, and the bin is deeper than the head at 32.3 in. Measure the alcove against the larger of the two, and allow the 6 in. clearance above the head.

Browse the full range of ice storage bins or ask the Ice Maker Supply team to confirm current bin stock before you commit to a pairing.

Installation Requirements

These are the manufacturer-published requirements for the KM-622MAK. Confirm each against your site before freight is booked — a modular head that arrives ahead of its electrical and plumbing rough-in sits in a hallway for weeks.

Electrical

• 115V, 60 Hz, single phase, 3-wire with ground. Operating voltage range 104–127V.

• 14.6 A running current; 20 A minimum circuit ampacity; 20 A maximum fuse or HACR-type circuit breaker.

• Hardwired at the site. Hoshizaki supplies no cord or plug, and the installation manual states the connection must be hard-wired and must meet national, state and local electrical code.

• The appliance must be grounded.

Water and drain

• Potable cold water inlet, 1/2 in. FPT connection, fed by a minimum 1/4 in. nominal ID copper water tubing run or equivalent.

• Supply pressure between 10 and 113 PSIG. Above 113 PSIG a pressure-reducing valve is required.

• Gravity drain only, 3/4 in. FPT outlet, minimum 3/4 in. nominal ID hard pipe. There is no built-in drain pump on this model.

• Horizontal drain runs need a fall of 1/4 in. per foot, with a minimum 2 in. vertical air gap between the end of the drain pipe and the floor drain.

• External filters, strainers or softeners may be required depending on local water quality.

Location, clearance and ventilation

• Indoor use only. The machine will not work at sub-freezing temperatures.

• Operating ambient temperature 45–100°F; incoming water temperature 45–90°F.

• Allow 6 in. of clearance at the rear, both sides and the top for air circulation and service access.

• The bin carries adjustable legs and the assembly must be levelled; Hoshizaki warns that improper levelling causes faulty performance and possible damage.

• R290 refrigerant requirements: a minimum room floor area of 77.3 sq. ft. (7.2 m²), and the machine must not be installed within 20 ft. of an open flame.

Freight and access are part of installation planning. The cabinet is 28 in. tall, but the shipping carton measures 33.5 in. x 25.88 in. x 34.6 in., and the crated head weighs 180 lb. Measure doorways, elevators and turns against the carton, not the cabinet.

Confirm local requirements before you order. Plumbing, electrical, health-department and building-code rules vary by state and municipality, and some jurisdictions require permitted work or an approved backflow device for commercial ice equipment. Verify the requirements that apply at your address with your licensed installer and your local authority having jurisdiction.

Related reading: commercial ice machine electrical requirements, 115V vs 208–230V, and water pressure requirements, PSI, flow and filters.

Operating Cost and Efficiency Considerations

Hoshizaki publishes two consumption figures for the KM-622MAK, both at 90°F air and 70°F water: 5.25 kWh per 100 lb of ice, and 17.0 gal of potable water per 100 lb of ice. Those are the numbers to build an estimate on, and they are the numbers most competing listings leave out. A worked example, with every assumption stated:

Substitute your own utility rates and realistic daily production and the arithmetic holds. The estimate deliberately excludes filter cartridges, cleaning chemicals, preventive maintenance labor and the extra HVAC load from 8,400 BTU/hr of condenser heat rejected into a conditioned kitchen — all real, none fixed enough to publish as a single number.

Three efficiency points specific to this machine. It is air-cooled, so there is no condenser water bill but there is heat discharged into the room; a water-cooled machine reverses that trade. R290 is a hydrocarbon refrigerant with very low global warming potential, which matters where refrigerant rules are tightening. And Hoshizaki states the model is ENERGY STAR qualified, so it may be eligible for utility rebates in some territories — check your own utility’s current program list. Ice Maker Supply’s guide to commercial ice machine operating cost treats filters, chemicals and service as separate line items.

Cleaning and Maintenance

Hoshizaki recommends cleaning and sanitizing the KM-622MAK at least once a year, and notes that more frequent cleaning and sanitizing may be required in some water conditions. Treat that as a floor rather than a target: water hardness, dust load and hours of operation all push it shorter, and many health departments and insurers set their own schedules.

• CleanAssist. The machine includes Hoshizaki’s CleanAssist function, described by the manufacturer as a simple one-hour cleaning process. Descaling and sanitizing are separate steps; both must be completed.

• Air filters. Removable air filters should be inspected far more often than annually — monthly is a common practical interval in a busy kitchen — and cleaned whenever they show dust loading. A blocked filter cuts output before it triggers any alarm.

• Water quality. Scale is the main enemy of a cube machine. Where water is hard, an ice machine filter with scale inhibition extends the descaling interval and protects the evaporator. Cartridges are a consumable, not a one-time purchase.

• Condenser access and EverCheck. The 6 in. clearance matters as much for reaching the condenser as it does for airflow. Hoshizaki’s EverCheck alert system flags conditions needing attention but does not replace a scheduled clean.

• Professional service. Sealed-system work on an R290 machine must be done by a technician trained and equipped for flammable refrigerants. Confirm a qualified provider covers your area before installation, not after a fault.

Warranty and Service Considerations

Hoshizaki’s current specification sheet for this model (item 13260K, revised 1/8/25) states three years parts and labor on the entire machine, five years parts and labor on the evaporator, and five years parts on the compressor. Hoshizaki’s model page additionally lists five-year parts coverage on the air-cooled condenser coil. Confirm the exact schedule in the warranty document supplied with your unit, since Hoshizaki revises coverage by model year.

Before you rely on that coverage, verify five things with the manufacturer or your installer:

• Installation requirements. Warranties on commercial ice equipment are commonly conditional on installation to the manufacturer’s published specifications, including electrical, water, drain and clearance.

• Registration. Ask whether registration is required and what the deadline is after commissioning.

• What labor actually covers. Parts-only coverage in years four and five means you pay the technician even when the part is free.

• Excluded maintenance. Cleaning, descaling, sanitizing and filter replacement are routine maintenance and are typically not warranty items; neglecting them can also void coverage on damaged components.

• Local service availability. Coverage is only useful if an authorized technician is reachable from your address, and R290 adds a training requirement.

Warranty service is provided under Hoshizaki’s terms through its authorized service network. For a general comparison of how the major brands structure coverage, see Ice Maker Supply’s commercial ice machine warranty guide.

Comparison With Relevant Alternatives

All four machines below are air-cooled modular heads sold on Ice Maker Supply with no storage included, so the comparison is like for like. A bin is an additional purchase in every case.

Price checked on September 10, 2026. Prices and availability may change.

Which one fits depends on the constraint that binds first. If width is the constraint, the KM-622MAK is the clear answer here — nothing else in this group delivers a 540 lb rated day in 22 inches. If you have 30 inches and expect demand to grow, the KM-730MAK adds roughly 80 lb of rated production for about $300, better value per pound provided the extra width is genuinely free. If your daily draw sits closer to 300–350 lb and capital is tight, the MC0530MAX-1 saves nearly $1,500 up front and its 370 lb rated figure is honest about warm-kitchen performance. The IM-0550-AH sits between them and offers half-dice ice some beverage operations prefer, but its listing publishes no AHRI-certified figure, so weigh its 399 lb at 90/70 against the others’ AHRI numbers with that caveat. There is no overall winner across these four — only the right match for your width, your peak draw and your ice type.

Before You Buy Checklist

• Daily ice volume. Calculate your peak-day requirement, then compare it against 540 lb, not 673 lb.

• Ice type. Confirm crescent cube suits your drinks, displays and any patient or buffet service.

• Machine dimensions. 22 in. W x 27-3/8 in. D x 28 in. H for the head alone.

• Assembled height and depth. About 74 in. tall and 32.3 in. deep on a B-300SF — check the alcove and any overhead shelf.

• Doorway and delivery access. Plan against the 33.5 in. x 25.88 in. x 34.6 in. carton and 180 lb crated weight, plus the bin, which ships separately.

• Bin. Choose the bin and confirm the top kit for that pairing. The bin is not included.

• Voltage and circuit. 115V single phase, dedicated 20 A circuit, hardwired — confirm an electrician is scheduled.

• Water connection. Potable cold water, 1/2 in. FPT, minimum 1/4 in. ID supply line, 10–113 PSIG.

• Drain. Floor drain within reach, 3/4 in. hard pipe, 1/4 in. per foot fall, 2 in. air gap. No pump is fitted.

• Ventilation and room size. Indoor only, 45–100°F ambient, minimum 77.3 sq. ft. floor area for R290, and not within 20 ft. of open flame.

• Clearance. 6 in. at rear, both sides and top.

• Water filtration. Budget for an ice machine filter and replacement cartridges if your water is hard.

• Freight delivery. Confirm liftgate, inside delivery and who uncrates and positions the equipment.

• Installation. Confirm your installer handles both the hardwire and the drain, and who levels the assembly.

• Warranty service. Confirm an authorized Hoshizaki technician trained on R290 covers your area.

Frequently Asked Questions

How much ice does the Hoshizaki KM-622MAK make in a day?

Hoshizaki publishes 673 lb per 24 hours at 70°F air and 50°F water, and 540 lb per 24 hours at the AHRI Standard 810 conditions of 90°F air and 70°F water. Plan around 540 lb, since most commercial kitchens run closer to the AHRI conditions.

Does the KM-622MAK come with an ice storage bin?

No. It is a modular head with no storage of its own and must be installed on a compatible Hoshizaki bin or dispenser, purchased separately.

Which storage bins fit the Hoshizaki KM-622MAK?

Hoshizaki lists the B-250SF, B-300SF, B-500SF, B-700SF, B-800SF, B-900SF, B-1150SS, B-1300SS, DB-130H, DB-200H and DM-200B. The B-300SF matches the head’s 22-inch width for a direct stack; wider bins use a Hoshizaki top-kit arrangement.

Can the KM-622MAK be plugged into a standard outlet?

No. It is hardwired at the site and ships without a cord or plug. It needs 115V, 60 Hz, single-phase power on a circuit with a minimum 20 A ampacity and a 20 A maximum fuse or HACR breaker, wired to code.

Does the KM-622MAK need a drain pump?

The machine has no drain pump. It drains by gravity through a 3/4 in. FPT outlet into a minimum 3/4 in. hard pipe, with a 1/4 in. per foot fall and a 2 in. air gap at the floor drain. With no gravity drain in reach, an external pump must be specified separately.

How tall is the KM-622MAK once it is installed on a bin?

The head alone is 28 in. tall. On a 46 in. Hoshizaki B-300SF the assembly stands about 74 in. high and 32.3 in. deep, and Hoshizaki asks for 6 in. of clearance above the head.

What refrigerant does the KM-622MAK use, and does it restrict where it can go?

R290 hydrocarbon, 5.3 oz. (150 g). Hoshizaki’s installation manual specifies a minimum room floor area of 77.3 sq. ft., no installation within 20 ft. of an open flame, and a bin with no electrical components or one designed for flammable refrigerants.

How often does Hoshizaki say the KM-622MAK should be cleaned?

At least once a year for cleaning and sanitizing, more often in some water conditions. The machine includes CleanAssist, which Hoshizaki describes as a one-hour cleaning process. Air filters need checking far more frequently than annually.

How does the KM-622MAK compare with the Hoshizaki KM-730MAK?

The KM-730MAK makes 756 lb per 24 hours at maximum in a 30-inch cabinet, against 673 lb in 22 inches. If you have the width, the KM-730MAK buys more capacity for a modest price difference; if you do not, the KM-622MAK is the higher-output choice at 22 inches.

Final Buying Recommendation

The Hoshizaki KM-622MAK suits an operator who needs a dependable 500 lb-plus day of general-purpose cube ice and cannot give up 30 inches of floor line to get it. Its strengths are specific: 540 lb of AHRI-rated production from a 22-inch cabinet, crescent cube that works across drinks, displays and service, a low-GWP R290 charge, manufacturer-stated ENERGY STAR qualification, and a strong warranty schedule at three years parts and labor on the machine and five on the evaporator.

Its limitations are about installation rather than performance. The machine is hardwired, so an electrician is part of the project. It drains by gravity with no pump, so a floor drain within reach is non-negotiable. It stores no ice, so the bin is a second purchase and a second delivery. And the R290 charge brings a minimum room floor area and an open-flame separation distance that a tight utility closet may not satisfy. Before ordering, confirm four things: the dedicated 20 A hardwired circuit, the gravity drain route, the bin model and its top-kit arrangement, and the delivery path measured against the 34.6 in. shipping carton.

Check current price and availability on the Hoshizaki KM-622MAK product page, request a quote or ask about compatible bins and accessories through the Ice Maker Supply team, and confirm your installation requirements and freight delivery terms before you order. If you are still comparing configurations, the full range of commercial ice machines is a useful next step.