Purifier Hot+Cool HP09

Oh, fuck no. As an owner of four of these things, they’re some of my most regretted purchases. They have a laughably low CFM, are stupid loud on even medium speeds, develop squeaky bearings within months, the filters are expensive as shit, and the software sucks. Seriously, do not buy one of these. Edit: I have two TP07s, an HP04, and an HP09. They all suck equally.

We've got a Dyson HP09, I've integrated with Home Assistant, so it will turn on or off automatically if the air quality drops (while I'm cooking), then on and off during certain times when I turn the room's lights on or off. Haven't don't much more than that but it's a great bit of kit, and also looks good in the room

Look for true HEPA filtration, and formaldehyde filtration. Dyson TP09 or HP09 are amazing, as is their BEAST the new Big+Quiet Formaldehyde purifier. These are very well made and designed purifiers with a true commitment to air quality. Some of these purifiers end up making things worse.

We ended up buying a Dyson because we wanted a air purifier / tall fan and the ability to control it from our phones / set a schedule for the fan. I don’t think anyone necessarily needs an air purifier that fancy though if it is purely to get dog smells out. 

i splurged and got the dyson air purifier that also works as a fan and space heater. personally, it was well worth the investment. i'm able to monitor the air quality, humidify and temperature in my home through an app.

Its great that Dyson is able to combine all these feature into one product but it doesn’t do the best job with air purification. Had a tower fan with air purification and the sensor failed in 9 months. Instead of replacing the sensor, the service center determined that it is easier to give us a replacement unit but only honor the original one year warranty.

It’s not necessary unless you have bad allergies or if there is smoke from some huge fire (knock on wood). I have Dyson combo fan/heaters with air purifier, so it’s automatically working when I use them.

I went to Costco to buy a winex brand for 500.00. When I got there the Dyson air purifier/ heat and cool were marked down from 600.00 to 200.00. So I bought two for less than one! I really, really like them.

Been using hot+cool since a few years and it makes my room so warm and toasty in winters.

I changed my filter after 2 years so I don’t agree with this. The technician just cleaned it and told me it isn’t as bad and I should continue using it.

**The Good** * **Longevity**"My Dyson fan/air purifier has been going strong for 10 years and it runs all the time." *(13 upvotes)* * **Quiet Operation**"Fan speed 1 is inaudible which is a shock to me. You can control it from the app and it even tells you the filter life as a percentage." *(14 upvotes)* * **Health Benefits**"I don't wake up super stuffy as I used to, less sneezing and wheezing. When you see the filter, you will see just how much nastiness collects in there." *(19 upvotes)* * **Heating Function**"Haven't tried the purifier, but the hot+cool works great. Mostly used the hot-function on cold days and it heats the room incredibly fast with low energy-consumption." *(16 upvotes)* **The Not So Good** * **Quality Concerns**"Anything Dyson is absolute garbage." *(26 upvotes)*"Yeah, I thought Dyson anything was a known brand to avoid." *(16 upvotes)* * **Poor Value for Price**"I kinda want one. I don’t want one for $950, want one." *(14 upvotes)* * **Filter Replacement Costs** Many users noted the ongoing expense of replacing filters. * **Reliability Issues**"Over the last 5 years Dyson has had a monumental fall off a cliff. Check out the horror stories on r/dyson. Literal thievery and extortion." *(26 upvotes)* * **Effectiveness Questions** Some users questioned whether Dyson purifiers improve air quality enough to justify the cost. **Comparison to Alternatives** * **Preferred Brands**"Some WAY better alternatives: \[...\] Air purifiers: Alen." *(26 upvotes)* * **User Rankings**"'Best purifiers' 1. Blue Air 2. Germ Guardian 3. DIY (Box fan + filter) 4. Honeywell 5. Dyson 6. [Levoit](https://go.shopmy.us/p-33552697)." *(12 upvotes)* * **Expert Opinion**"[Blue Air](https://go.shopmy.us/p-33552493). My wife suffers from airborne allergies, and these air purifiers practically eliminated her allergy episodes at home." *(44 upvotes)* * **DIY Options** Several users recommended simple box fan + filter setups as cost-effective alternatives. **Tips and Tricks** * **Remote Replacement**"You can download the Dyson app and use your phone as the remote! Might not be compatible with all models though." *(97 upvotes)* * **Filter Maintenance**"Order and install new filters!" *(415 upvotes)* * **Filter Inspection**"You may be surprised if you compare those filters to actual new ones… I thought they were fine, but compared to new ones they definitely weren't." *(41 upvotes)* * **Thrift Shopping Strategy**"I find the trick is to go every day! I have 4 thrift stores within a 5-mile radius of my work. On lunch, I hit one of the 4." *(128 upvotes)* **The Verdict** Reddit users are divided on [Dyson air purifiers](https://go.shopmy.us/p-33552975). Some praise their longevity, quiet operation, and health benefits, while others criticize high cost, brand reputation, and questionable value compared to alternatives. The consensus suggests that Dyson purifiers work, but more affordable brands such as [Blue Air](https://go.shopmy.us/p-33552493), [Coway](https://go.shopmy.us/p-33553147), and [Levoit](https://go.shopmy.us/p-33552697) offer similar or better performance at lower prices. For those committed to Dyson, thrift stores are a popular source for substantial discounts. Across discussions, the most common advice is to prioritize **true HEPA filtration and sufficient airflow** rather than brand prestige or extra features.