An undercounter ice maker is the appliance that finally kills the frantic pre-party scramble for bagged ice. You install a water line, plug it in, and it quietly fills a storage bin with clear, slow-melting cubes while you focus on everything else. The market splits between models that pump water out and those that drain by gravity, daily production ratings that vary from 50 to over 100 pounds, and bin sizes that determine how often you need to scoop. Getting the installation right the first time matters.
I’m Mohammad Maruf — the founder and writer behind Gardening Beyond. I’ve spent countless hours studying manufacturer specifications, comparing compressor types, and analyzing aggregated owner feedback to find which 18-inch undercounter ice makers actually deliver on their production claims and hold up under daily use.
Whether you are outfitting a home bar or a small cafe, choosing the right machine requires understanding build quality and real-world output, not just the listed specs. This guide breaks down the most reliable options so you can find the 18 inch undercounter ice maker that fits your space and schedule without guesswork.
How To Choose The Best 18 Inch Undercounter Ice Maker
An undercounter ice maker is a long-term appliance that sits in your cabinetry for years. Choosing the wrong feature set—like a gravity-drain model in a basement bar—can lead to costly plumbing modifications or constant service issues. Focus on these factors before you buy.
Drain Type: Gravity vs. Drain Pump
This is the single most important installation decision. Gravity-drain models require the drain outlet to be positioned below the machine’s drain port, usually by at least six to ten inches. That works fine for a main-floor kitchen but becomes impossible in a basement or a remote bar island. Drain-pump models include an electric pump that pushes water upward through a hose, giving you far more flexibility in where the machine sits. If you are installing under a counter with no floor drain below, a model with a built-in pump is essential, not optional.
Daily Ice Production vs. Storage Bin Capacity
Manufacturers list a production number—typically between 50 and 120 pounds per day—but that rating assumes ideal ambient and water temperatures. In a warm kitchen, the real output may be lower. Storage bin capacity matters just as much: a machine that makes 100 pounds a day but only stores 25 pounds means you need to transfer ice to a freezer bin regularly during a party. Match the storage size to your peak usage window, not your average day.
Ice Shape and Quality
Most undercounter models produce clear, restaurant-style cubes that melt slower than the cloudy, hollow-center ice from a countertop portable unit. Some machines produce crescent-shaped or nugget-style ice, each with different surface-to-volume ratios that affect cooling speed and drink dilution. If you serve cocktails or whiskey, a larger, denser cube with a slow melt rate is the goal. If you run a coffee shop, soft chewable nugget ice may be more popular with customers.
Installation Dimensions and Ventilation
An 18-inch width is standard, but depth and height vary significantly. The machine needs to fit inside the cabinet cutout, and it also needs at least two inches of clearance around the compressor vent panel. Many buyers overlook the height requirement: some models exceed 34 inches, which can interfere with standard countertop overhangs. Measure your cutout depth, width, and height, and check the spec sheet for minimum ventilation space on all sides.
Compressor and Refrigerant Type
These machines use sealed compressors that cycle on and off to freeze the ice mold and then harvest it. Units with R290 refrigerant (propane-based) are slightly more energy-efficient and run cooler than R134a units, but they require careful handling during service. Compressor quality varies between brands—a compressor from a well-known supplier (Embraco, Secop) generally means fewer service calls. Budget-tier machines often use generic compressors that may fail sooner under continuous commercial use.
Quick Comparison
On smaller screens, swipe sideways to see the full table.
| Model | Category | Best For | Key Spec | Amazon |
|---|---|---|---|---|
| EdgeStar IB450SSP | Premium | Restaurant-grade clear cubes | 50 lbs/day, 25 lbs bin | Amazon |
| Coolake IM180S | Heavy Duty | High-volume commercial use | 320 lbs/day, 120 lbs bin | Amazon |
| COTLIN Drainless | Quiet Run | Drain-free installations | 42 lbs/day, 22 lbs bin | Amazon |
| Electactic Nugget | Nugget Ice | Chewable ice for drinks | 66 lbs/day, dual bin | Amazon |
| Gilati Y40FA | Fast Cycle | High output in narrow width | 120 lbs/day, 30 lbs bin | Amazon |
| ICYGLEE Drain Pump | Best Value | Drain pump on a budget | 100 lbs/day, 24 lbs bin | Amazon |
| EUHOMY CIM002-80S | Compact Fit | Standard cabinet installation | 85 lbs/day, 24 lbs bin | Amazon |
| Mojgar 15″ | Reversible Door | Flexible left/right door swing | 100 lbs/day, 30 lbs bin | Amazon |
| RAPSUAR 95 Lb | Large Bin | Generous storage capacity | 95 lbs/day, 35 lbs bin | Amazon |
| ICEVIVAL CIM010 | Entry Level | Affordable drain-pump model | 80 lbs/day, 25 lbs bin | Amazon |
| EUHOMY CIM-01 | Industrial | Large-scale commercial output | 400 lbs/day, 250 lbs bin | Amazon |
In‑Depth Reviews
1. EdgeStar IB450SSP
The EdgeStar IB450SSP is a 15-inch-wide unit that produces restaurant-quality clear sheet ice. The sheets come out of the mold and drop into a 25-pound storage bin, and you break them apart by hand. The internal drain pump means this machine works in locations where gravity drainage is impossible, which opens up installation options for basement bars and kitchen islands. It uses an R134a compressor that has a long track record in residential undercounter appliances.
Owner feedback highlights the quiet operation compared to older Scotsman models. The computerized controls include an indicator light for full bin and low water, and the reversible door allows you to match your cabinet layout without ordering a separate hinge kit. The stainless steel door and removable bin make routine cleaning straightforward. The unit weighs 76.7 pounds, so it stays planted when the compressor cycles.
The trade-off is production volume: 50 pounds per day is adequate for a family or a small bar, but a large party will empty the bin quickly. Some owners report that the ice must be broken apart before it goes into glasses, which adds a step. A few users note that the machine can beep every two weeks, requiring a reset, which becomes a minor annoyance over time. Despite that, it remains a strong choice for buyers who prioritize ice clarity and a pump-assisted drain.
What works
- Produces clear, dense sheet ice that melts slowly.
- Built-in drain pump allows flexible installation locations.
- Reversible door and stainless steel build.
What doesn’t
- Ice comes out in sheets that must be broken apart.
- Only 50 lbs daily production and 25 lbs storage.
- Some units require periodic resets or become louder over time.
2. Coolake IM180S
The Coolake IM180S is built for high-volume environments where 50 pounds per day is not enough. It produces up to 320 pounds of clear cube ice every 24 hours and holds 120 pounds in its insulated storage bin, which uses thickened foam layers to keep ice solid for seven to nine hours without power. The machine includes a food-grade activated carbon filter that reduces scale buildup and improves taste, which matters for coffee and cocktail service.
The LCD panel gives you control over ice thickness and includes a self-cleaning cycle. The compressor runs on R290 refrigerant, which is more energy-efficient than older refrigerants. The unit measures 26 inches wide and 37 inches tall, so it requires a larger cabinet cutout than standard 15-inch models. The commercial-grade stainless steel outer shell withstands frequent cleaning and front-panel access makes component service manageable.
Owner reports consistently mention the fast ice production and responsive customer service. The included water filter is a practical upgrade that saves you from buying a separate inline system. The warranty covers parts for three years and the compressor for five years, which is longer than most competitors. The downside is the footprint: this machine needs dedicated space, and its 575-watt draw is higher than residential-grade units. The storage bin is also deep, so scooping ice from the bottom requires bending over the bin opening.
What works
- Very high daily production and large storage capacity.
- Built-in water filter reduces scale and improves ice taste.
- Long warranty coverage on parts and compressor.
What doesn’t
- Large dimensions require significant cabinet space.
- Higher power consumption than standard undercounter units.
- Deep bin makes scooping the last ice inconvenient.
3. COTLIN 15″ W Drainless
The COTLIN drainless ice maker eliminates the need for a drain line entirely, which is a game-changer for installation spots where running a drain pipe is impractical. It connects only to a water supply and a standard electrical outlet. The unit produces crescent-shaped ice at a rate of 42 pounds per day, storing 22 pounds in an insulated bin that keeps the temperature between 26.6 and 32 degrees Fahrenheit. The brushed stainless steel exterior matches standard kitchen appliances.
Customer feedback consistently praises the quiet operation and simple hookup. The reversible door and adjustable leveling feet make it easy to fit into an existing cabinet cutout. The one-touch start button removes the learning curve, and the R600a compressor is efficient for the production level. ETK certification indicates that the machine has passed safety and quality testing, which adds confidence for a long-term appliance.
The trade-off is production output: 42 pounds per day is the lowest on this list, and the 22-pound bin fills quickly during a gathering. The drainless design means water is recirculated, and owners report that changing the water periodically is necessary to maintain ice clarity. Some initial units had compressor or fan defects, but the replacement process from the seller was straightforward. For a small home bar or a guest house where drainage is impossible, this machine solves a real problem.
What works
- No drain line required, simplifies installation significantly.
- Very quiet operation compared to similar machines.
- One-touch start and easy setup.
What doesn’t
- Low daily ice production suitable only for light use.
- Small 22-pound storage bin fills quickly during parties.
- A few units arrived with compressor defects initially.
4. Electactic Nugget Ice Machine
The Electactic nugget ice machine produces soft, chewable ice that is popular in healthcare settings and coffee shops. It makes up to 66 pounds of nugget ice per day, and the first batch drops in under 10 minutes. The dual bin design allows continuous production while you pull ice from the lower section. The stainless steel front and compact 15-inch width let it slide into a standard cabinet space. Enhanced insulation keeps 80 percent of the ice from melting over 12 hours.
Owners note that the nugget ice is consistent and holds up well in drinks without clumping. The LCD panel displays ambient temperature and sends low-water and full-bin alerts. The self-cleaning mode reduces the frequency of manual descaling. The unit weighs 61.1 pounds, which makes it manageable for a two-person install. The reversible door gives you flexibility in layout orientation.
The main limitation is the 66-pound daily output, which fits a busy home kitchen or a small cafe but not a high-traffic restaurant. Some owners report that the fan noise is noticeable when the compressor runs, though not disruptive. The metal exterior shows fingerprints more readily than brushed finishes. If chewable nugget ice is your priority—and it is a strong preference for many drinkers—this machine delivers that texture better than any cube-producing model.
What works
- Produces soft nugget ice that is easy to chew.
- Fast first batch in under 10 minutes.
- Good insulation keeps ice from melting for hours.
What doesn’t
- 66 lbs/day may not be enough for commercial-grade demand.
- Fan noise is noticeable during operation.
- Metal exterior shows fingerprints easily.
5. Gilati Y40FA
The Gilati Y40FA pushes 120 pounds of ice per day from a 15-inch-wide chassis, making it one of the most output-dense undercounter options on the market. It produces 40 clear cubes every 10 to 16 minutes and stores up to 30 pounds. The three-layer insulated housing keeps the bin cold enough to minimize melting between harvest cycles. The reversible stainless steel door gives you the same layout flexibility as the other units in this width class.
Owners report that the ice hardness is adjustable through the LCD panel, which allows you to balance production speed against cube density. The 24-hour timer lets you schedule production to avoid running the compressor during peak electricity hours. The self-cleaning function activates by holding the Timer Clean button for five seconds. The unit requires gravity drainage, so ensure the drain hose is positioned below the outlet.
Some users mention that the machine is slightly taller than standard undercounter cutouts, so verify your cabinet height before ordering. The noise level during ice drop is louder than some competing models. A few owners experienced shipping damage, but the replacement process was handled quickly. For buyers who need high production from a narrow footprint, the Gilati delivers the best output-to-width ratio in this price range.
What works
- High daily production in a compact 15-inch width.
- Adjustable ice hardness and 24-hour timer.
- Three-layer insulation keeps ice frozen longer.
What doesn’t
- Height may exceed standard undercounter clearance.
- Ice drop noise is louder than some competitors.
- Shipping damage reported in a few cases.
6. ICYGLEE Drain Pump
The ICYGLEE undercounter ice maker includes a built-in drain pump and produces 100 pounds of clear cubes per day, with a 24-pound storage bin. The pump allows the machine to discharge water upward, so you are not restricted to a location above a floor drain. The LCD panel shows operating status and lets you adjust cube thickness. The compressor uses R290 refrigerant and runs on 203 watts, which is efficient for this production level.
Owner reviews highlight the fast ice production and quiet humming sound during operation. The auto-shutoff when the bin is full prevents overflow. The reversible door feature allows you to choose the hinge side during installation. The included water inlet and outlet hoses simplify the connection process. Several owners note that the ice cubes are crystal clear and hold up well in drinks for extended periods.
The most critical concern involves the drain pump design: the drain pipe must drop at least 10 inches below the unit before leveling out, which can be impossible in installations with limited vertical space. A few owners reported water damage when the pump could not push the water far enough. The overall build quality is acceptable for the price point, but the plastic bin components may not withstand years of heavy commercial use. For a home bar or small office, this machine offers strong value with pump-assisted drainage.
What works
- Built-in drain pump for flexible installation.
- Produces clear cubes at 100 lbs/day on low wattage.
- Quiet operation with auto-shutoff function.
What doesn’t
- Drain pump requires significant drop height to work.
- Plastic bin components feel less durable than stainless.
- Some units had drain pump defects causing leaks.
7. EUHOMY CIM002-80S
The EUHOMY CIM002-80S fits the standard 15-inch cabinet opening and produces 85 pounds of cube ice per day. The 24-pound storage bin is adequate for daily use, and the 203-watt R290 compressor keeps energy consumption low. The LCD panel shows ambient temperature and allows you to adjust the ice-making cycle time to control cube thickness. A 24-hour timer lets you schedule production windows to avoid noise during sleeping hours.
Owners describe the setup as straightforward, with the water inlet connection and drain hose requiring only basic plumbing skills. The stainless steel door matches standard kitchen appliances. The self-cleaning function is activated by holding the timer clean button for five seconds. The reversible door hinge gives you the ability to choose the opening direction during installation. The three-layer insulated housing reduces ice melt between cycles.
Some owners note that the machine requires gravity drainage, so installation is limited to locations where the drain outlet sits below the unit. A few reports mention that the ice cubes can be slightly cloudy rather than fully clear if the water supply has high mineral content. The included ice scoop is basic but functional. For a mid-range investment, this machine delivers reliable daily ice without demanding complex installation or high electricity draw.
What works
- Simple gravity drain installation for standard kitchens.
- Energy-efficient compressor at 203 watts.
- Adjustable ice thickness and 24-hour timer.
What doesn’t
- Gravity drain limits installation to above-drain locations.
- Ice may appear cloudy with hard water.
- Basic included scoop and manual.
8. Mojgar 15″ W
The Mojgar 15-inch ice maker produces 100 pounds of hard, slow-melting cubes each day and stores 30 pounds in the bin. It uses R290a refrigerant and runs on 110 volts. The reversible double-door design allows both left and right opening. The LCD touch screen gives you access to four core functions: ice thickness adjustment, scheduled ice making, automatic cleaning, and real-time temperature display. The built-in LED bin light helps you see the ice level in low-light spaces.
Owner feedback from office installations highlights the adjustable timer and ice hardness settings as useful features for customizing the ice to different drink types. The unit uses gravity drainage, so the drain pipe must be lower than the machine outlet. The 304 food-grade stainless steel interior resists corrosion. The ABS inner tank and three-layer vacuum insulation foam reduce energy consumption compared to industry averages.
Some owners mention a learning curve when setting up the timer and hardness controls for the first time. The unit is 31 inches tall, which is shorter than many competitors and should fit under most standard countertops without height issues. A few reviews note that the drain system requires careful hose routing to prevent standing water in the bottom of the machine. For an office or home bar where gravity drain is possible, the Mojgar offers a strong combination of production and storage.
What works
- High 100 lbs/day production with 30 lb storage bin.
- Reversible door design for flexible layout.
- LED bin light and LCD touch controls.
What doesn’t
- Gravity drain requires careful hose routing.
- Control panel has a learning curve.
- Some units had issues with standing water in the bin.
9. RAPSUAR 95 Lb
The RAPSUAR undercounter ice maker stores 35 pounds of ice in its bin, which is larger than most competitors in its width class. It produces 95 pounds of clear cubes per day, with a cycle time of 15 to 20 minutes for a batch of 40 cubes. The 750-watt R290 compressor is more powerful than the 200-watt units, which can help maintain production in warmer ambient temperatures. The stainless steel body and reversible door match standard kitchen fixtures.
Owner reviews frequently mention the large bin capacity and fast initial ice production. The machine comes with an on/off switch, which is a simple feature that some competitors omit. The self-cleaning function activates by holding the timer clean button. The automatic water supply connection means you do not have to refill a reservoir. The unit works as a built-in or freestanding installation.
Some owners experienced door durability issues, with the hinge or handle breaking after a few months of use. A few users report that the machine is not suitable for nugget or chewable ice, so confirm that you want standard clear cubes before purchasing. The compressor runs louder than some competing models, which may be noticeable in an open-plan kitchen. If bin capacity is your priority and you can manage the noise, this machine keeps you scooping less often.
What works
- Large 35-pound storage bin reduces scooping frequency.
- Powerful 750-watt compressor maintains output in heat.
- Simple on/off switch and self-cleaning cycle.
What doesn’t
- Some doors have hinge or handle durability issues.
- Compressor noise is higher than some units.
- Not designed for nugget or chewable ice types.
10. ICEVIVAL CIM010
The ICEVIVAL CIM010 is one of the most affordable ways to get a built-in drain pump and undercounter installation in one package. It produces 80 pounds of ice per day and stores 25 pounds. The electric drain pump allows water to be discharged without gravity, so you can install this machine in a location where running a gravity drain is impossible. The LCD control panel shows operating status and lets you adjust ice thickness.
Owners note that the machine produces ice quickly and the modern design fits well in a home bar setting. The self-cleaning feature reduces manual maintenance. The unit can be installed as a built-in or freestanding model. The included drain pump hardware and hoses simplify the connection process.
The most common complaint is that the machine requires a manual restart if the power blinks or goes out, even if the unit remains powered on. Some owners experienced an E2 error code early in the machine’s life, which in some cases required a replacement unit. A few buyers note that the plastic components feel less robust than the all-metal construction of higher-priced machines. For a budget-friendly entry into undercounter ice with drain pump capability, this machine handles the basics.
What works
- Built-in drain pump at an entry-level budget.
- Fast ice production and self-cleaning mode.
- Flexible built-in or freestanding installation.
What doesn’t
- Requires manual restart after power interruption.
- Some units show error codes early in life.
- Plastic components feel less durable than stainless.
11. EUHOMY CIM-01
The EUHOMY CIM-01 is a full-size commercial ice machine that produces 400 pounds of ice per day and holds 250 pounds in its storage bin. This is not a 15-inch undercounter unit—it measures 22.5 inches wide and 63.5 inches tall—but it belongs on this list for buyers whose definition of undercounter includes a dedicated commercial-grade appliance. The machine uses R290 refrigerant and a 700-watt compressor that cycles in 11 to 20 minutes per batch.
Owner reviews from small coffee stands and restaurants confirm that the machine keeps up with continuous demand. The LCD panel includes a 24-hour timer, full ice reminder, and self-cleaning function. The ice cube size is adjustable through the control panel. The machine ships in two boxes that may arrive separately. ETL certification confirms it meets commercial safety standards.
The most significant drawback is the dual-box shipping, which can lead to one box arriving days after the other. Some owners experienced an E2 error after a month of use, which was traced to a locked water pump that was inexpensive to replace. A few customers report that the water purge drains into the ice bin rather than through a separate hose, which requires monitoring during cleaning cycles. If you need industrial output and have the floor space and electrical capacity, this machine delivers production that no 15-inch unit can match.
What works
- Extremely high daily production and storage capacity.
- Adjustable cube size and timer functions.
- ETL certified for commercial use.
What doesn’t
- Large footprint requires dedicated floor space.
- Dual-box shipping can cause delivery delays.
- Purge water drains into the ice bin instead of a separate line.
Hardware & Specs Guide
Compressor & Refrigerant
These machines use sealed compressors that cycle on and off to freeze and harvest ice. R290 (propane-based) refrigerant is more energy-efficient and runs at lower discharge temperatures than R134a, but it requires certified technicians for service. R600a refrigerant is also common in smaller units and offers similar efficiency. The compressor wattage rating—anywhere from 200 to 750 watts—gives you an idea of the unit’s thermal capacity. Higher wattage generally means faster freeze cycles and better performance in warm ambient conditions.
Drain System
Gravity drain models rely on the drain pipe being lower than the unit’s drain port, usually by at least six inches. This works in basements with a floor drain or on a main floor where the drain line drops into a crawlspace. Drain pump models include an electric pump that pushes water up to four feet vertically, giving you more installation options but adding a potential failure point. The pump motor in some units can be noisy, and the drain hose must be routed without kinks to prevent overflow.
Ice Production Cycle
Most undercounter ice makers use a vertical evaporator plate with pins that form individual cube molds. Water flows over the plate, freezes in layers, and then a harvest cycle releases the cubes into the bin. Cycle time ranges from 8 to 20 minutes depending on water temperature, ambient temperature, and set ice thickness. Thicker cubes take longer to freeze but melt slower in the glass. The harvest cycle includes a brief reverse-flow of hot gas to loosen the cubes from the mold.
Bin Insulation
Storage bin insulation quality is measured by how long ice stays frozen without melting into a solid block. Units with three-layer vacuum insulation foam or thickened polyurethane walls can keep ice solid for 7 to 12 hours after the compressor stops. Units with thinner insulation may cause the ice to clump together within a few hours, especially in warm kitchens. Look for units that advertise at least one inch of foam insulation around the bin walls and door.
FAQ
Can I install an undercounter ice maker without a drain line?
How much clearance does an undercounter ice maker need for ventilation?
Why is the ice from my undercounter maker cloudy instead of clear?
What does the E2 error code mean on my undercounter ice maker?
How often should I clean my undercounter ice maker?
Final Thoughts: The Verdict
For most homeowners who want clear ice, flexible installation, and long-term reliability, the 18 inch undercounter ice maker winner is the EdgeStar IB450SSP because it balances a drain pump, commercial-grade cubes, and proven owner satisfaction. If you need nugget ice for drink stations, grab the Electactic Nugget Ice Machine. And for high-volume cafe or bar use, nothing beats the Coolake IM180S.