Drying clothes indoors, humidity and condensation

This is the part of indoor drying nobody mentions when they tell you to save money by skipping the dryer. The water has to go somewhere, and indoors, somewhere is your home.

How much water is involved

A washer load leaves the drum holding roughly two to five pints of water depending on load size, fabric type and spin speed. Denim and towels are at the top of that range; a light load of shirts is at the bottom.

Where it goes

Water vapor moves through a home and condenses wherever it meets a surface cold enough. In practice that means, in order: single-glazed windows and window reveals, external wall corners, behind furniture pushed against an outside wall, and inside closets on external walls.

Those are the places to check. If any of them shows water, black spotting or a musty smell, the indoor drying is contributing to it.

What humidity to aim for

US health and environmental agencies broadly recommend keeping indoor relative humidity below about 50 percent to control mold and dust mites, with 30 to 50 percent the usual comfort range. A cheap hygrometer costs a few dollars and takes the guesswork out entirely.

The three ways to deal with it

1. Ventilate. An open window, a trickle vent or an extractor fan lets the moisture leave. Free, and ideal in mild weather.
2. Dehumidify. A dehumidifier collects the same water into a tank you pour away. About 23 cents a load, and the right answer in winter when opening a window is not realistic.
3. Dry somewhere else. A balcony, a shared laundry room, or outdoors. Free and best of all, if you have the option.

What does not work is drying in a closed room and hoping. That is the arrangement that produces condensation, and adding heat to it makes the moisture enter the air faster rather than removing any of it.

Signs it has gone too far

• Windows running with water in the morning after a drying day.
• Black spotting in window reveals, on sealant, or in ceiling corners.
• A musty smell in a closet or behind furniture on an outside wall.
• Wallpaper lifting or paint blistering on an exterior wall.
• Laundry taking noticeably longer than it used to - the room is saturated.

Any of those means the moisture load exceeds what the room can shed. The fix is ventilation or dehumidification, not a different rack.

What to use

Top pick · Drying a load overnight

VEAGASO Dehumidifier, 28 Pints, 2000 Sq Ft

28 pints a day on a published 158 W draw - the best pints-per-watt figure here, and quiet enough at 38 dB to run in a bedroom.

What the manufacturer publishes

Open

10.6"D x 6.7"W x 15.9"H

Folded

Not applicable

Drying line

Not applicable

Load capacity

28 pints per day

Material

Compressor dehumidifier

Rated wattage

158 W

Costs 2.9¢ an hour to run - 14.5¢ for a 5-hour session, at 18.34¢/kWh (US residential average, June 2026).

Figures from Manufacturer listing on Amazon, retrieved 2026-09-02.

A dehumidifier does not blow air at your laundry; it removes the water your laundry has just put into the room. That is why it dries a closed room full of washing and a fan does not.

158 W is the number to compare against a heated rack. Running it for eight hours costs about 23 cents at the current US average rate - roughly what a 270 W heated rack costs for five.

38 dB is quiet enough to sleep through, which matters because the natural way to use one is overnight in a closed room with the rack.

This is a compressor unit, not a thermoelectric one, which is why it can pull 28 pints where the small desktop units manage a fraction of that.

Good

• 158 W published - the running cost is calculable
• 28 pints per day
• 38 dB quiet mode
• 16.5 lb, portable between rooms

Not so good

• 35.3 cfm airflow is modest, so it works best in a closed room
• Compressor units lose capacity in a cold room
• Tank needs emptying or a hose run

Skip this if your drying room is under about 60 F. Compressor dehumidifiers slow down badly in the cold - that is a physics limit, not a brand problem.

$199.99 - View on Amazon

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Pick 2 · A whole damp apartment

Waykar 34 Pint Energy Star Dehumidifier, 2000 Sq Ft

34 pints a day across 2,000 square feet with a 90 degree aimable vent, from the one unit here sized for a flat rather than a room - and it publishes no wattage.

What the manufacturer publishes

Open

12.08"D x 8.46"W x 19.84"H

Folded

Not applicable

Drying line

Not applicable

Load capacity

34 pints per day (at 95 F, 90% RH)

Material

Compressor dehumidifier, Energy Star certified

Rated wattage

not published

No wattage published. Waykar publishes a 34 pint rating, an Energy Star listing and a 2,000 sq ft coverage figure, but no rated wattage anywhere on the current listing. No running cost can be computed from a pint rating, so none is published here.

Figures from Manufacturer listing on Amazon, retrieved 2026-10-03.

The 34 pint rating is quoted at 95 F and 90% relative humidity, which is the industry test condition and not your apartment. Every dehumidifier's headline pint figure is quoted this way; expect less in a real room. Waykar at least states the conditions.

The 90 degree manual airflow swing is the feature worth having for laundry specifically - it lets you aim the dry outlet air at the rack, which turns the unit into a dehumidifier and a directional fan at once.

No rated wattage is published, so this site publishes no running cost for it. That is a real step down from the VEAGASO, which states 158 W and is therefore the only dehumidifier here whose cost per session can be calculated at all.

Humidity control runs 30% to 80% in 5% steps with a 3% hysteresis band, there is auto-defrost and a 24 hour timer, and it takes either the 0.66 gallon tank or a continuous hose. At 34 pints a day the tank is about four empties, so plan on the hose.

Good

• 34 pints a day with the test conditions stated
• Adjustable 90 degree airflow direction, aimable at a rack
• Energy Star certified, rated for 2,000 sq ft
• Dual drainage - 0.66 gallon tank or continuous hose

Not so good

• No published wattage, so no running cost can be computed
• No published airflow figure in cfm
• Headline pint rating is a test-condition figure, not a room figure
• Warranty is one year, extended to two only on registration

Skip this if you want to know what it costs to run. The VEAGASO publishes 158 W and this publishes nothing, which on a unit that runs for eight hours at a time is the specification that matters most.

$201.47 - View on Amazon

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