The best towel warmers for a sauna or plunge room

The verdict: buy the Fontaines bucket warmer. It takes up to three oversized towels, which is the only capacity here that fits a robe alongside the towels — and the robe is the item you actually want warm after a December plunge. It is also the single listing in this category that names ice baths and cold plunges as an intended use. If a damp towel from yesterday is the real problem, the VIPBATH is the only unit here with a drying mode as well as a warming one, and it folds flat out of season. If you want numbers, the FLYHIT publishes both its wattage and its warm-up time — 450 W, about 25 minutes — which is the pair that tells you when to switch it on. And if you want one button and nothing to think about, the SereneLife is one touch and one hour.

Capacity is the whole decision

Every listing in this category quotes capacity as 'up to two 40 by 70 inch towels', and that phrasing hides the real difference. A 20-liter bucket genuinely takes two bath towels. It does not take two bath towels and a sherpa-lined changing robe, which is what a cold plunge in January actually requires — see the best sauna and cold plunge robes for the robes in question. Only the three-towel and 35-liter units here have the volume for that. Measure the robe before you buy, because a warmer you have to choose between the towel and the robe for is a warmer you will stop using.

Where it goes, and where it does not

1. 1Not inside the hot room. This is a mains appliance with a plastic or fabric exterior, and a sauna interior runs at 175 to 195 degrees F. It belongs in the changing area, the bathroom or the mudroom between the plunge and the house.
2. 2Within reach of where you get out. The whole value is a warm towel at the moment you are coldest. Twenty feet away and three doors along is a warm towel you will not bother with.
3. 3On a surface that tolerates a drip. You will load it with towels that have been near water. A 450 W element and a puddle are not a combination to be casual about.
4. 4Not as a dryer, unless it says so. Four of these five explicitly say not to put damp items in. Only the VIPBATH publishes a drying mode.

Who each pick is for

• Fontaines — a robe and towels together. Three oversized towels of capacity, four timer steps, ETL certified, and the only listing naming plunge use. Skip it if the plunge is indoors and the walk back is three steps.
• VIPBATH 35 L — damp towels and small rooms. Drying mode as well as warming, folds flat, tip-over shut-off. Skip it if you want something that looks like spa equipment; this is a smart appliance in a nice finish.
• FLYHIT 20 L — the published numbers. 450 W, warm in about 25 minutes, up to a 4-hour hold. Skip it if you want to warm a robe: measure first, because 20 liters is a two-towel bucket.
• aGratHav — a temperature readout. LCD showing temperature and time, metal heating plate, ETL and FCC. Skip it if you want a long hold; it stops at one hour.
• SereneLife — one button. Single-touch, 60-minute shut-off, insulated cool-touch lid, from a brand already in this site's chiller coverage. Skip it if you want to choose a hold time; there is no alternative to one hour.

What none of them publishes

• A temperature the towels reach. Five for five. Everything is described as warm, cozy or spa-like; nothing gives a figure except the one unit with an LCD, and that reports rather than specifies.
• Wattage, on three of five. Two publish 450 W. The others leave you unable to compare running cost — see sauna running costs for how we treat electricity figures.
• Warm-up time, on four of five. Only FLYHIT commits to about 25 minutes, which is the number that decides whether you switch it on before your first round.
• Interior material, on four of five. One names a stainless inner tub. For the rest, the part in contact with your towel is unspecified.

Every pick on this page comes from published specifications, not from hardware we own. Read how we pick — including what spec-led ranking cannot tell you.