BLACK+DECKER Portable AC Review: Smaller Than the Box Says

We would only buy the BLACK+DECKER BPACT10WT portable air conditioner for a small room where a window unit is impossible, and only after reading the fine print on the box. It's the best-selling single-hose portable we found on Amazon, and it will make cold air. But the "10,000 BTU" on the listing is the old ASHRAE number. DOE's certification database lists the BPACT10WT at 6,300 BTU of seasonally adjusted cooling capacity (SACC), and its efficiency rating sits right at the federal minimum for a portable that size.

SACC is the number to shop by. It's the DOE test that accounts for what a single hose does to a room: the unit pulls room air you already paid to cool across its hot coil and blows it outdoors, and hot outdoor air leaks back in through every gap to replace it. That's why a 6,300 BTU SACC portable cools a bedroom, not the 450 square feet the listing promises.

The owner record adds two more reasons for caution: a run of BPACT10WT and BPACT08WT units that beep and switch themselves off at random, and a warranty process owners describe as slow. If the window takes a window unit, buy that instead. If it has to be a portable, Black+Decker's own inverter model or a dual-hose unit costs more up front and much less to run.

Read the box twice

Every BPACT listing leads with an ASHRAE number and tucks the SACC figure further along. Here is what DOE has on file for each model, next to what the listing headline says:

The room claims line up with ENERGY STAR's room air conditioner chart if you feed it the ASHRAE headline: 10,000 BTU maps to 400-450 square feet, and B+D says 450. Feed the chart the SACC instead and the BPACT10WT lands near a 250 square foot room. The chart was built for window units and assumes an 8 foot ceiling, so treat that as a rule of thumb, but it's a far better one than the box. One BPACT08WT owner reached the same place by experience: marketed for 450 square feet, good for about 300.

Two more wrinkles. The Amazon title for the BPACT10WT says 5,500 BTU SACC and one bullet says 5,550, both lower than DOE's 6,300; we go by DOE. And B+D's own product page for the BPACT08WT calls it 8,000 BTU ASHRAE and 4,100 DOE, while DOE and Amazon list 5,300. Size by DOE and you'll be in the right range.

What a single hose costs you

DOE's rule for portables, 10 CFR 430.32(cc), sets a minimum CEER that scales with SACC for units made from January 10, 2025. By our arithmetic from that formula, the minimum is 6.63 at 6,300 BTU, 7.34 at 8,350 and 7.89 at 10,200. The BPACT10WT is certified at 6.6, the BPACT12WT at 7.3, the BPACT14WT at 7.9. They meet the floor and go no further. (The higher room air conditioner minimums that took effect May 26, 2026 are in a different table, 430.32(b), and don't apply to portables.)

Put it in watts. At its rated SACC, the BPACT10WT draws about 955 watts for every hour of full cooling (6,300 ÷ 6.6). Black+Decker's own inverter single-hose model, the BPACT08NM, delivers 8,000 BTU SACC at CEER 12.0, about 667 watts for more cooling, roughly 45% less electricity per BTU. A dual-hose inverter goes further: DOE lists the Midea Duo 12K with heat at CEER 14.2 against the BPACT12WT's 7.3, so the Midea uses about half the electricity for the same rated cooling.

The single hose also shapes how the room feels. Air leaving through the hose is replaced by air from the hallway, the attic hatch and the window gaps, hot and humid in summer, which is why owners in muggy apartments complain that a single-hose unit never quite dries the room out. You can blunt it: keep the hose short and straight as the manual asks, seal the window kit with the foam it includes, and wrap the hose in an insulated sleeve so it stops radiating heat back into the room.

Where it fits and where it doesn’t

• Good fit: a bedroom or office up to about 250 square feet with a sliding or casement window that can't take a window unit, a rental that bans window units, or a few hot weeks a year where the purchase price matters more than the bill.
• Buy a window unit instead: if the window is double-hung. Frigidaire's budget 5,000 BTU window unit rates CEER 11.0 on the room-AC test, and the inverter window units we like rate around 15. Different test procedures, so the numbers aren't strictly comparable, but the gap is large.
• Buy an inverter portable instead: if you run it every night all summer. The BPACT08NM, a dual-hose Midea Duo or the Whynter ARC-1230WNH pay back their higher price in electricity.
• Size by SACC: skip the BPACT10WT for anything much over 250 square feet. The BPACT14WT's 10,200 BTU SACC covers about 400-450 on the chart, and none of the line is a garage cooler.
• California: B+D's product pages say BPACT models aren't sold there.

Setting it up

Setup is simple, and a few manual details are worth knowing before you start:

• Window kit: the slider fits openings up to 59 inches. Under 20.5 inches you cut the plain panel down; never cut the one with the hose hole.
• Clearance: at least 12 inches of open air all around. B+D recommends 31.5 inches at the sides and 19.7 inches above for best airflow, which is more floor space than the cabinet suggests.
• Power: a grounded 120-volt outlet, nothing else on it, no adapter and no extension cord. The cord has a leakage-detection plug (LCDI) that the manual says to test before each use.
• Moving it: the BPACT10WT weighs 47.3 pounds and the BPACT12WT 58.7. Keep it upright; if it's been on its side, the manual says to wait at least 6 hours, 24 recommended, before switching it on.
• Filter: the manual wants the evaporator filter cleaned every week of operation.
• Hose parts: keep the plastic hose connectors. Owners who bought used units without the hose inlet had trouble finding one; some fitted a DeLonghi part, and B+D support sent one owner a replacement.

Water: mostly invisible, until it isn’t

In cooling mode the BPACT is designed to evaporate its condensate into the exhaust, so most of the time you never empty anything. When the air is humid enough that the internal tank outruns the evaporation, the unit stops and shows "ft" until you drain it. For dehumidify mode the manual says to run the supplied drain hose to a floor drain or bucket, lower than the outlet.

That design explains most of the water complaints. One BPACT14HWT owner never emptied the tank for 11 months, then had to every few days through a rainy stretch. BPACT08WT owners describe sloshing from a puddle under the fan and, on a secondhand unit its new owner had never drained, water pouring out and rust above the waterline. In a humid summer, drain the tank from the lower plug every so often, and in dehumidify mode keep the hose connected. Clean the coils if it sloshes constantly; the manual says to leave anything beyond the filter to a qualified technician.

Reliability: the shutoff problem

The pattern that worries us most is the BPACT10WT and BPACT08WT that beep and switch off on their own, after ten minutes or after five hours, then turn straight back on when you press power. It comes up often enough with those two models, including on replacement units and on a two-year-old unit that suddenly started, that we treat it as a known fault rather than bad luck. There is no reliable cure. A few owners say draining the internal tank helped; one buyer returned two in a row and switched brands.

Other failures are scattered: a BPACT14WT that started stopping after four or five minutes, a BPACT10WT that died and wouldn't power on, a rattle on a BPACT08WT. There are happy long-term owners too, including one running three BPACT14WTs who calls them a good value that works within limits. Most of the reports come from troubleshooting threads, so they lean negative.

The warranty comes from W Appliance, which makes the BPACT line under the Black+Decker name: one year of parts and one year of labor, manufacturing defects only, and W Appliance can replace your unit with a new or remanufactured one. It excludes units transferred from the original owner, units bought refurbished or as-is, and shipping costs for the replacement. The manual says not to return it to the store and to call 844-299-0879 to open a ticket. Owner experiences with that line range from a replacement part sent free to no reply at all. Keep the receipt and the serial number, and buy from a seller with a usable return window; the BPACT10WT on Amazon was sold by a third-party appliance retailer when we checked.

Noise

Black+Decker publishes no decibel figure for the BPACT line. Expect a fixed-speed compressor that cycles fully on and off. A BPACT14HWT owner says the restart wakes them and shakes the room even on the lowest fan speed, and their workaround is the one we'd suggest: cool the room into the mid 60s, then switch to fan for the night. Sleep mode raises the setpoint 2°F over two hours; the manual doesn't describe any quieter compressor operation. If you sleep next to it, the inverter models are the better buy.

How it compares

• BPACT08NM: the Black+Decker we'd buy. Same single hose and window kit, but an inverter compressor and DOE-certified CEER 12.0, nearly double the BPACT10WT's efficiency, with more rated cooling. It costs more and has little owner history yet, and we couldn't confirm its warranty terms.
• Midea Duo and Whynter ARC-1230WNH: the dual-hose answer for a bigger room or nightly use: twice the efficiency of the BPACT12WT, quieter inverter operation and heat-pump heat. Both cost far more, and the Duo had no featured offer on Amazon when we checked.
• A window unit: cheaper, more efficient and out of your floor space. If your window is double-hung, start there.

Our call

Buy the BPACT10WT only for a room of about 250 square feet or less, only where a window unit won't go, and only if the price gap to the BPACT08NM matters more to you than a bill nearly twice as high per hour of cooling. Wrap the hose, seal the kit, drain it in humid weather, and keep the return window open for the first few weeks in case yours develops the shutoff habit. For anything else, buy the inverter.