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Real BTU Check product guide

Whynter ARC-122DS Elite Dual Hose Portable Air Conditioner

A humid 400 sq ft room with a drain point for the upper gravity port

An Elite dual-hose unit rated 12,000 BTU ASHRAE and 7,000 BTU SACC for 400 square feet, with 82 pints a day of dehumidifying, R32 refrigerant, a 61-89 degree thermostat and both upper and lower drain ports. The intake hose can be capped to run it like a single-hose unit on hot or rainy days, and the continuous-drain hose is sold separately.

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Published specifications

  • Maker: ARC-122DS, 12,000 BTU ASHRAE and 7,000 BTU SACC, 400 sq ft
  • Maker: 115 V, 1,200 W max, 10.5 A; CEER 6.88, EER 9.15; R32; 68 lb
  • Manual: 5.9 in exhaust hose and 5.0 in intake hose, each up to 60 in; 9 ft total limit
  • Manual: window kit 6.5 in W, 20 in min, 46 in max; maker page says 56 in max
  • Manual: 20 in clearance all round; separate 15-amp circuit; no extension cord or power strip
  • Manual: upper gravity drain port for continuous use, drain hose sold separately

Fit and limits

Strengths

  • Upper gravity drain port allows uninterrupted running without emptying a tank
  • True dual hose, and the intake can be capped to run single-hose in hot or wet weather
  • 82 pints a day of dehumidifying and both ASHRAE and SACC ratings published by the maker

Caveats

  • The hose for continuous drainage is sold separately, not in the box
  • Whynter's manual and product page disagree on the window kit maximum, 46 versus 56 inches
  • No humidistat, so Dehumidify mode cannot be set to a target humidity level

12,000 BTU ASHRAE, 7,000 BTU SACC, and a 400 square foot claim

Whynter publishes both ratings for ARC-122DS and the listing repeats them: 12,000 BTU under ASHRAE and 7,000 BTU under the DOE SACC test. Those come from different test procedures and cannot be converted into each other, so we quote both and leave them as they are. The coverage figure attached to this exact model by the maker is 400 square feet, and the listing's own bullets say 400 as well. One Amazon spec field says 450 square feet instead; the maker's number for this model number is 400.

The rest of the technical data agrees across sources: 115 V, 60 Hz, single phase; maximum 1,200 watts and 10.5 amps; CEER 6.88 and EER 9.15; thermostat 61 to 89 degrees Fahrenheit; three fan speeds; airflow 330 cubic metres an hour or 194 CFM; 68 pounds net and 79 gross; R32 refrigerant. The maker calls the colour Silver and the listing calls it Gray, which is cosmetic but worth knowing if you are matching a room.

Dehumidifying capacity is 82 pints a day, higher than the larger ARC-14S in the same range. That is a useful hint about where this unit earns its keep: humid rooms as much as hot ones.

Two hoses of two different sizes, and a cover that turns it into one

This is a genuine dual-hose unit, but the two hoses are not the same size. The exhaust hose is 5.9 inches in diameter and the intake hose is 5.0 inches, with matching slide-locking connectors that go on in opposite directions: counter-clockwise for the large exhaust, clockwise for the small intake. The larger port is on the left when you face the back of the unit, the smaller on the right. The fixtures and the window kit openings are 5.0 inches. Each hose extends to a maximum of 60 inches.

The manual makes a point that most listings do not: if the outside air is much hotter or more humid than the room, you can cover the intake hose with the included cover and the machine will then behave like a single-hose unit. That is a real operating choice, not a defect, and it is the same advice Whynter gives for rainy weather.

Both Whynter's manual and its accessories page say not to extend hoses beyond nine feet total. Because the two hoses have unusual diameters, Whynter sells version-specific replacement and extender sets and tells you to measure your existing hoses before ordering: one set is for 4.3-inch intake with 5.0-inch exhaust, the other for 5.0-inch intake with 5.9-inch exhaust. Check yours rather than guessing.

The window kit has two published maximum lengths

The window kit is 6.5 inches wide with a 20-inch minimum length. Whynter's product page and the Amazon bullets both say it extends to 56 inches. Whynter's own manual for this model says 46 inches, and the replacement window kit Whynter sells for it, ARC-WK-DUALN, is also listed as 20 to 46 inches. If your window opening is between roughly 46 and 56 inches, ask Whynter before assuming the supplied kit covers it.

Below the minimum, the manual says the slider can be cut to fit, never through the hose cut-outs. Above the maximum, you need extra material such as Plexiglas, PVC or plywood, or a second kit used alongside the first. The manual's install sequence has you open the window about five inches, adjust and secure the slider, screw the fixtures through the hose cut-outs, then snap each hose connector to its fixture. Extra holes can be drilled in the kit for more adjustment range, and the kit can be screwed to the window frame for a long-term install.

The manual also notes that a window or sliding door held open by a kit may need additional security measures. That is worth planning for on a ground-floor room rather than discovering later.

Twenty inches clear, its own 15-amp circuit, and four hours upright

The manual asks for at least 20 inches of clearance around the unit and says not to use it in closets, cabinets or cramped gaps between furniture. It needs a hard, even, level surface strong enough for 68 pounds. The casters are for smooth flat floors, with caution on carpet and no rolling over objects. Do not tip it beyond 45 degrees when moving it, and leave it standing upright for at least four hours before it is first plugged in.

Electrically the rules are the same as across Whynter's portable range and they are firm: never cut or remove the ground prong, use a correctly grounded outlet, do not use an extension cord or power strip, and use a separate 15-amp circuit for the air conditioner. The cord has a built-in LCDI circuit breaker with a reset button. Flammable substances and pressurised containers such as aerosols should stay at least 50 cm away, and the refrigerant is R32 with the full flammable-refrigerant warning set in the manual.

Whynter says the unit is optimised for an ambient temperature of 64 to 90 degrees Fahrenheit. The compressor has an automatic three-minute delayed start after a quick off-and-on, which prevents overheating and breaker trips. There is also a five-degree cushion: when the set temperature is within five degrees of the room temperature, the unit runs on fan only.

Two drain ports, and the hose for the useful one is extra

The self-evaporating function fully exhausts condensate in most environments when humidity is below 70 percent. Above that it still exhausts about 98 percent, with the remaining 2 percent collecting in the tank. When the tank fills, the unit stops, a warning light comes on and STOP appears on the display, and it will not run again until you drain it.

Manual draining means switching off, rolling the unit to a drain or putting a flat container or the optional drain bucket under the lower drain port, pulling the cover and rubber plug, letting it empty and refitting both firmly. The better option for long runs is the upper drain port: pull the upper drain plug at the back, fit a drain hose and run it downhill to a drain, and the unit can run uninterrupted. Note that the manual says the drain hose for this is sold separately. If continuous drainage is part of your plan, budget for the hose.

Dehumidify mode has its own quirks. The compressor cycles intermittently and the fan sits on Low below 77 degrees. Venting is optional in this mode: vent the hoses and the room cools as it dries but outside air enters; leave them unvented and warm air recirculates, which the manual warns will mean more frequent draining. There is no humidistat, so you cannot set a target humidity level. Fan-only mode needs no hoses at all.

Filters, end-of-season storage and the warranty to check on paper

Two filters sit in one frame: a washable pre-filter for dust, pet hair and dander, and an activated carbon filter for smoke and odours, held on three pins. Clean the filters at least every two weeks, vacuuming or tapping the pre-filter then rinsing it under running water no hotter than 100 degrees, and dry it fully before refitting. The carbon filter is not washable and is replaced every two to three months; Whynter's part for this unit is ARC-CF-12SD. Never run the machine without the filter in place.

Storage is a short routine with one step people skip: on a warm day, run Fan-only mode for half a day so the inside dries out, then drain the condensate completely, clean the filters, bundle the cord, pull the remote batteries and fit the supplied storage cover. If you leave the window kit up, unclip both hoses and cap the fixtures with the included covers. Whynter asks you to contact its support address for internal cleaning instructions rather than improvising.

Both the maker's page and the listing state one year on the unit with three years on the compressor. The warranty pages at the back of this manual are scanned images with no extractable text, so we are not quoting terms from them. The warranty pages of this model's manual are scanned images we could not read as text, so read the printed warranty that comes with your unit and check the seller and condition of the specific offer before you rely on coverage.

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Primary sources

  1. Whynter product page for the exact model ARC-122DS, with specification block and accessories
  2. Whynter user manual for the exact model ARC-122DS, 2022 revision

Primary sources checked .

Compare with

Side-by-side pages, this model next to: Whynter ARC-14S 14,000 BTU Dual Hose Portable Air Conditioner, BLACK+DECKER BPACT10WT Portable Air Conditioner, BLACK+DECKER BPACT14WT Portable Air Conditioner.

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