Air purifiers in short-term lets: Levoit Core 300 vs Dyson, pet smell, and what guests actually notice

I bought a Levoit Core 300 for my Edinburgh flat after a family with a golden retriever stayed for three nights. The dog wasn't in the listing. Neither was the fact that they'd apparently brought the dog specifically because they assumed all Edinburgh Old Town flats allowed pets — which, to be fair, some do. Mine doesn't. But I didn't find out until I walked in to do the pre-next-guest check and the smell hit me in the hallway.

The cleaner couldn't fully shift it. We sprayed, we opened windows overnight, we washed the soft furnishings. The underlying smell — slightly doggy, slightly stale — persisted at a level I could detect but wasn't sure guests would. I bought the air purifier as an experiment. Left it running for 48 hours on high before the next check-in. No complaints. Whether that proves the purifier worked or whether the smell had cleared anyway, I honestly can't say.

But I kept it. And over the following year I added a second one to the living room, and eventually put one in my Brighton flat nearest the harbour (which has a damp problem in winter). I now have four air purifiers across three properties. Here's what I've actually noticed.

Does an air purifier make a guest-visible difference?

In my experience: sometimes yes, mostly no. Guests rarely mention air quality in positive reviews unless they have allergies. But I've had two specific instances where guests with allergies mentioned in their messages before arrival that they reacted to dust mites. Both stays were in the Edinburgh flat with the purifier running. Both left without mentioning any reaction. Both reviewed. One mentioned "really clean air" in the review, which I suspect was prompted by the fact that the purifier was visible and running on the bedside table.

That's anecdotal. But given the cost, I'm comfortable with it.

The Levoit Core 300 vs the Levoit Core 300S

The original Core 300 is the model I bought first. It's a compact unit, about 28cm tall, runs at three fan speeds, and covers a room of roughly 12m² effectively — according to Levoit's specs, though real-world performance on the higher end of that range is debatable.

The 300S is the same unit but with app control and a VoiceIQ compatibility for Alexa and Google. In a rental property, app connectivity is a liability rather than a feature — guests pairing their phones to the machine, changing settings, leaving it on full blast overnight. I use the original 300 without Wi-Fi capability. Set it to medium speed and lock the setting by putting a small piece of tape over the speed button. Yes, this is inelegant. It works.

Price: the Core 300 typically runs around £69–£85 on Amazon UK depending on the colour. Replacement filters are around £25–£30 for a two-pack. Levoit recommends replacing every 6–8 months with average use, which in a rental probably means every 4–5 months given higher occupancy.

I haven't verified current pricing direct from Levoit's UK site but Amazon UK listings I've seen recently put the Core 300 at around £75 as of mid-2026. Worth checking before you buy.

What about Dyson?

I looked seriously at the Dyson Purifier Cool Gen1, which combines an air purifier with a fan. Ideal for summer — guests get a fan and filtered air in one unit. The main issue: price. At around £350–£400 for the TP07 model, it's five times the cost of a Levoit Core 300. The Dyson also requires app setup and has a more complex filter replacement process.

For a higher-end property where guests expect premium kit, a Dyson on the bedside table looks the part and probably does impress. In my Edinburgh flat — which is a good flat, comfortable and clean, but not a luxury property — it would be absurd. Guests aren't paying for Dyson-level kit and I'd be spending money purely for aesthetics.

If I had a property charging £250+/night with a Sonos sound system and Nespresso Vertuo, yes, I'd put a Dyson in. At £140/night, a Levoit at £75 gives me most of the air quality benefit for a fifth of the cost.

Pet smell specifically

This is the scenario where purifiers actually earn their keep in rental properties. HEPA filters (H13 standard in the Levoit Core 300) capture pet dander and allergens down to 0.3 microns. Activated carbon filters absorb VOCs and odour molecules. It's the carbon filter that handles smell.

What doesn't work: those cheap Amazon purifiers with "HEPA-type" (not true HEPA) filters and minimal carbon layer. I bought one for my Lake District cottage early on — £35, looked fine. It made noise. It did not filter anything meaningfully. I ditched it after six months and replaced it with a Levoit.

For serious pet smell after an undisclosed dog stay, a purifier alone isn't enough. You need enzymatic spray (I use Simple Solution) on upholstery and soft furnishings first, then the purifier running for 24–48 hours. Combined, they clear most cases. Very stubborn cases need professional carpet cleaning.

Winter damp and the Edinburgh flat

The Edinburgh flat has a persistent winter damp smell in the main bedroom. The building is a stone Georgian tenement — beautiful, cold, slightly damp from November to March. I run the dehumidifier in that bedroom from October. But dehumidifiers don't filter air, they just remove moisture.

With both the dehumidifier and the Levoit running through the winter months, the damp smell is almost entirely gone by check-in time. Without both running, it's noticeable when you walk in. I know which version my guests experience — and it's the one with both.

Practical notes if you're adding one

A few things I've learned through trial and error:

Put it on a shelf or windowsill, not the floor. Floor placement means it's constantly pulling in floor-level dust and the filter clogs faster. Height matters for air circulation.

Don't put it directly next to the bed. Running on medium speed, the Levoit Core 300 produces about 24 dB of noise — quiet, but not silent. Guest feedback was neutral when I had it two metres from the bed. When I moved it to the corner of the room, no one mentioned it.

Replace filters on schedule. The indicator light on the Levoit glows red when it's time. Don't ignore it hoping it'll sort itself. An expired HEPA filter starts pushing particulates back into the air instead of capturing them — counter-productive.

Don't leave it set to "Auto" mode with a smart sensor if the unit has one. In my experience, auto mode runs the fan at high speed whenever cooking smells drift in from the kitchen. Guests who wake up at 3am to a suddenly-loud purifier react poorly.

The listing copy question

I've added "HEPA air purifier in bedroom" to my Edinburgh flat description. Since adding it, I've had three enquiries from guests specifically mentioning they have allergies and asking whether I use scented cleaning products. I've switched to fragrance-free products for that flat as a result. Two of those three guests have now stayed and reviewed positively, one mentioning the air quality directly.

Is it worth the £75 unit cost and £25/year on filters? For my Edinburgh flat with its winter damp problem and periodic pet incidents, yes, clearly. For a modern flat in a dry climate with no allergy guests and no pet history — probably not, unless you're targeting that market specifically.

Do the maths for your own properties. The Levoit pays for itself after one prevented 3-star review.