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How to use a floor fan in a heatwave

Updated: 21 October 2026

You already own a floor fan, the bedroom is hot, and the question is where to stand it, how long to run it, and when to unplug it. A floor fan moves air you already have. It does not replace shade, a drink, or a sound plug. This is not a ranking. Model rows and prices stay on the [floor fans comparison](/hub/cooling/floor-fans). Peter F. used NHS, GOV.UK, and Electrical Safety First guidance, plus these listings, on 20 October 2026. We did not measure your room. A qualifying purchase through our links can earn a commission at no extra cost to you.

You already own a floor fan, the bedroom is hot, and the question is where to stand it, how long to run it, and when to unplug it. A floor fan moves air you already have.

Our top picks

DREO DREO silent pedestal fan, black

Best overall

DREO DREO silent pedestal fan, black
9.4/10about £79.99
View offer
DREO DREO tower fan, white

Rank 2

DREO DREO tower fan, white
9.2/10about £79.99
View offer
Belaco Belaco 16 inch pedestal fan

Best value

Belaco Belaco 16 inch pedestal fan
8.0/10about £29.99
View offer
On this page
  1. 1.What the fan is doing
  2. 2.Where to stand it
  3. 3.How long to leave it on
  4. 4.Clean it, then stop if it is wrong

What the fan is doing

The breeze helps because moving air evaporates sweat from your skin, so you feel cooler while the thermometer barely moves. The NHS heatwave page says fans can help when the temperature is below 35°C. At or above that, blowing hot air across you can make things worse. GOV.UK’s keep-cool checklist says the same threshold: do not aim the fan at your body. Point it so the air circulates. Watts move air. They do not refrigerate it. Shade the windows by day, and open them when the outside air is cooler, often later in the evening. If you are still choosing, the order of decisions is on the buying guide.

Where to stand it

Put the fan on a hard floor, not on a rug that lets a light pedestal walk, and not where the cable crosses the doorway you use in the dark. Schallen reviews describe feet and screws that loosen, and the Belaco 16-inch listing prints 1.36 kg for a fan up to 125 cm tall. Keep the intake a short distance off the wall, and keep curtains out of the grille. When it is cooler outside, open the window and move stale air towards that opening, still not at your face. In a bedroom, set the head so it washes past the bed. Sleep-specific noise and lights are on the bedroom floor fan page. A tower can sit closer to the skirting. A pedestal needs room for the base and the swing.
DREO DREO silent pedestal fan, black

Testsieger

DREO DREO silent pedestal fan, black
9.4/10about £79.99
View offer

How long to leave it on

Electrical Safety First says not to run an electric fan overnight or while you are out, to keep smoke alarms working, and to stop if you smell burning or the cable is damaged. Use a timer so the fan stops while you are awake enough to notice, or switch it off when you leave the room. An 8-hour timer on the DREO listings, 12 hours on the AirCraft Lume, and 7.5 hours on the ROVSUN are stop clocks, not a claim that an all-night run is safe. Set the lowest speed that still helps, and step up only if you are in the room and the air is under 35°C. If you go out, unplug it. Unplug it again before you clean it.

Clean it, then stop if it is wrong

Dust on a grille makes a fan noisier and weaker. Unplug first. On the DREO tower the grille is removable, and Belaco metal-fan reviews mention taking the front guard off to clean. Wipe with a dry or barely damp cloth, and let every part dry before you plug in again. Do not open the motor housing. Stop if you smell burning, the plug or cable is hot or damaged, you see smoke, or water has gone into the motor. A new rattle or a loose blade screw is a stop as well. If the fault arrives with the fan, the Consumer Rights Act 2015 gives a short-term right to reject, normally within 30 days. Photograph it and tell the seller. Do not file a pin or rewire the lead.

Common questions

Does a floor fan cool the room?
It cools you, not the air, by moving air across your skin. The NHS links that help to temperatures below 35°C. You should not expect a stated drop on a thermometer, and a higher wattage does not change that.
Where should you place it?
On a flat floor, clear of the cable route, with the intake off the wall and curtains out of the grille. Aim the flow across the room or towards an open window once the outside air is cooler, not into your face. In a bedroom, let it wash past the bed.
Can you leave it on all night?
Electrical Safety First recommends you do not. A timer of 7.5, 8, or 12 hours on these mains fans is a way to make the fan stop, not approval to sleep through until morning. Switch it off when you leave, and keep smoke alarms working.
Should you aim it at your face?
GOV.UK says not to aim a fan at your body. Use the oscillation or a slight tilt so air circulates, and keep the direct stream off your eyes for long stretches. Below 35°C that still helps.
How do you clean the blades or the grille?
Unplug, then remove the front guard if the listing says it comes off, as on the DREO tower and in Belaco metal-fan reviews. Wipe dust with a dry or barely damp cloth and dry the parts before power goes back on. Do not open the housing.
What do you do if it smells or rattles?
Unplug it and leave it unplugged. Burning, a hot plug, smoke, or water in the motor means stop, not another speed setting. A new rattle or a loose blade screw is the same. If the fault was there on arrival, use the 30-day short-term right to reject under the Consumer Rights Act 2015.
Should the fan run while you are out?
No. Electrical Safety First includes time away from home in the same caution as overnight running. Unplug the fan when you leave. A timer you set and then forget, with nobody home, is not the point of the timer.

Related pages

Pedestal fan vs tower fan

Floor fans

Best floor fan UK: DREO bedroom pick, Belaco value

Floor fan buying guide: which type, noise and plug

Quiet floor fan for a bedroom: speed, lights, timer

Sources

Public UK sources from the research digest, used for this page on 20 October 2026. Prices, stars and review counts are the amazon.co.uk figures in this comparison. Listing decibel figures were not treated as a reading at every speed.

  1. NHS: heatwave, how to cope in hot weather (retrieved 20 October 2026)
  2. GOV.UK: beat the heat, keep cool at home (retrieved 20 October 2026)
  3. Electrical Equipment (Safety) Regulations 2016, regulation 35 (retrieved 20 October 2026)
  4. Electrical Safety First: electric fans (retrieved 20 October 2026)
  5. OPSS: T-SUN 12-inch floor fan report, 17 August 2026 (retrieved 20 October 2026)
  6. Ofgem: price cap, 1 October to 31 December 2026 (retrieved 20 October 2026)
  7. Consumer Rights Act 2015, section 22 (retrieved 20 October 2026)
  8. Which?: how fan tests are run (retrieved 20 October 2026)