This was posted 11 months 6 days ago, and might be an out-dated deal.

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Dyson Purifier Hot+Cool Formaldehyde Purifying Fan Heater HP09 $804.30 (Was $1099) Delivered @ Dyson

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Felt this needed it’s own post as it is such a good price. Credit to @wwei1129

Original post: https://www.ozbargain.com.au/node/775988

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  • Great deal

  • xiaomi purifier and a separate heater? guess you're paying for the style and 2 in. 1

    • I don’t buy xiaomi after having a DOA vacuum directly and took three months to get support to refund my money.

      • -3

        Bit different to purifier though

        • Not really they both use a motor

  • +2

    Wow. What world am I living in where an $800 pedestal fan is "such a good price"

    I get this is a deal website not a value judgement website but holy hell I'm out of the loop on this one.

    • yep,, I get this ,, not a deal for you … But sure for some…

    • +5

      To start with, it doesn't have a visible fan blades
      Can heat
      Can purify air
      Can operate through the app
      And support Mr Dyson retirement plan.

      Maybe little bit over priced, but I wanted one.

      • +3

        Personally , I trust Dyson products… I have few of them.. including DC19 being the oldest which purchased in mid 2007, even after almost daily use for 16yrs, still going strong. When I purchased that I knew it was "Huge amount" & moving from Bag to bag-less.. Same with other devices, never missed a beat,, but agree,, this is not everyone's choice..

    • +2

      A good heater is 200-300. A good purifier is around 400. Not just a fan. Having one device that is from a good name brand and has a good history of reliability I would take that over a cheaply made device. Also you can set it in your kids room as a temp and it maintains it and purifies the air at the same time.

    • Agreed. This is insane.

      I've spent the past decade testing air purifiers as a hobby, done a fair bit DIY builds (yes, because I am a total nerd). And the Dyson 'air multiplier' design is a terrible implementation- you want all the air going through the HEPA filters, not 5% that you get in the Dyson design. This is like speed stripes to make a car go faster.

      Even as a heater- the "blow air through heating coils" design is vastly inferior to oil heaters.

      Bladless fans are pretty decent as an idea, though I personally find that air movers are more effective and quieter. I have owned three bladeless fans over the years. This product is one decent idea (a bladeless fan) with two crap sideline products shoehorned into it.

      • +1

        Even as a heater- the "blow air through heating coils" design is vastly inferior to oil heaters.

        Huh ? Both are resistive electric heating - they're exactly the same. An oil heater simply adds lag to the heat it puts into the room.
        Both will put precisely 1KW of heat into the room from every 1KW of power they draw.

        • Sit in in the airflow of a coil/fan heater, and you dry the hell out of your skin. The upside is that the heat generation is pretty instant.

      • I've spent the past decade testing air purifiers as a hobby.

        During the Cbr bushfire years back, this (lower gread model) was the only purifier I could get hold of and it cleared my smoky yellow misty air to clear within hours.

        I don't have degree in air quality nor funds to buy 10 different products to compare, but it worked, case closed?

        • "cleared my smoky yellow misty air to clear within hours."

          That says it all right there why the Dyson design is half -arsed.

          The standard recommendation for air purifiers is they do 6 complete room volumes within one hour.

          I've tested smoke concentrations in my rooms (soldering fumes and fire alarm testing sprays), I'd expect things to clear well within 10-30 minutes.

          Sure, maybe the Dyson eventually works, maybe it's good enough for you, but it's not a good design.

          I've got one of these bladless fans that 'do air purification.' I regard the purifier part to be so crap that I haven't even bothered to install the filter unit.

          • @rumblytangara: Maybe install the filter and it would work. 🤣

            • -1

              @bne87: I've got properly designed purifiers for if I want to purify air. No point half arsing it and compromising the airflow of the fan.

              • @rumblytangara: I don’t think you know what your talking about. I also own a daikin mc55ypcm and now this. Dyson tested the hp09 and built it with zero air leaks. They made sure even screw holes do not leak air past the filter system.

          • +1

            @rumblytangara:

            6 complete room volumes within one hour.

            Where did you pull that up from? Comple room? What size room?

            • @boomramada: It's the industry standard. Just look around for how testing is done on these things.

              You size the purifier then select the airflow to allow for six room changes per hour.

              So you have a little room, get one of those little Xiaomi units that people on Ozbargain like so much. Big living room? Get something way bigger and run it faster.

              • @rumblytangara: Show us some links? Facts and figure?

                Or is this a one of those backyard mythical claims?

                • +2

                  @boomramada: If you want, you can find this easy enough yourself via 5 seconds on Google. But clearly you're not really interested in more than an internet argument and want to feel good about the Dyson. To which I congratulate you on.

                  Where did you pull that up from?" Comple room? What size room?

                  I mean, you somehow think that purifiers can be designed to clean the air in only part of a room(?!) so there's not going to be a meeting of minds here.

              • +3
                • @bne87: Couple of issues with that video. Both are major.

                  First and far most important, however 'effective' they claim the filter is, you have to reduce it by 94%. By Dyson's own claims, 15x air is sucked through the back of the oval opening than goes through the fan blades (and the filter) hidden in the base. So… 6% % of air goes through the filter unit. 100% of the air that comes out of a traditional purifier goes through the filter.

                  Secondly, that demo which relies on orange smoke. Smoke particles big enough to be visible are simply huge. PM2.5 is mostly invisible at distances of a couple of metres, totally invisible. I've run tests (using soldering equipment as the pollution source) in an enclosed room- the air looks smokey when the pollution is crazy high, and after fifteen or so minutes when the air looks normally clear, the particle counters still show PM2.5 to be at unhealthy levels.

                  It's a great marketing video though, but without a particle counter showing counts over time in an closed room or positioned in the airflow, it's about as meaningful as this excellent Dyson video:

                  https://www.youtube.com/watch?v=MS5uKv0q-WM

  • Perfect timing!

  • idk if its a weird question, but how is this for people who own cats? I imagine the air purifying bit would be nice, so that's good. Does it catch the cat fur? will that mess up the filter? very new to this stuff and have been looking at these cool+heat+purifier options

    • Hair normally not but pet dandruff yes. Vacuuming is best for hair

  • I thought Formaldehyde was bad for humans. Whats the go ?

    • +1

      It preserves you, and slows down the aging process

    • It's in packaging, glue, cardboard, paint, foam etc. So this filters the output.

  • Can the filters be replaced with cheaper aftermarket options?

    Also, I'm guessing the filter function can be turned on/off as required? We have indoors plants at home and air is relatively clean (all electric, no gas home… Well except flatulence) So would prolly only wanna use the filter function during the bad pollen days and so would hope to get 2-3years out of the filter.

    Lastly, did anybody get Cashback tracked on Shopback after using this code?

    • cashback tracked at shopback, as did the dyson challenge $25 - but i'm not convinced this code passes the t&c's so will just have to see if it comes through.

    • You can't disable filtering, but you can physically remove the filter and continue operating the appliance. I don't recommend this, as it will ultimately result in the turbines gumming up with dust, and I'm not sure they're user serviceable. Better to consume filters to lengthen appliance life.

      Also, this is really an air purifier much more than it is a fan. If you want to keep cool on hot days, you have to be sitting within a metre or two from it. A cheap Kmart pedestal fan will have at least 3x the range. I can't speak for the heating, as this is based on my "Dyson Purifier Cool" TP07.

      Keep in mind, if the filter is being consumed, then it must by definition be removing particulates from your air, which is good! If your air is already fairly clean, then your filter should last longer. I suspect the app's filter change notification is purely based on time operated, so you should be able to simply tap "reset filter life" in the app to use your filter for twice as long, or more.

      I suspect the best way to filter longevity would be good household practises like cooktop extraction fan (it's not only gas cooktops because the food itself releases particulates), automated vacuuming, duster that attracts dust, rather than sweeping it, keeping windows shut on poor air quality days, minimise use of paints, solvents, aerosols etc.

      I'm not sure a few indoor plants make a notable improvement. At least I found no evidence of it in my casual measurements. I did measure a degradation of air quality after watering them, I think from gases released from the soil, but that might be limited to certain soils and/or fertilisers.

      • I forgot to mention another reason why the HP09 makes a terrible cooling fan. It's only 76 cm high, and the exhaust vents are only in the straight edges, so it will blow at around 45-65 cm height and keep your knees cool. If you're sitting, it will be blowing at waist height and definitely not reaching your chest or face unless you have the appliance standing on a stool.

  • Great unit, particularly if you have a smart home. But I'm pissed I just bought one two weeks ago at Harvey Norman (had a voucher to spend)….

  • Great product and Perfect timing and bought one!

  • Wow, this sounds great for all the formaldehyde I have laying around the place.

  • I got one of these, received this week and has had multiple power failures. The machine makes a popping noise, turns off and becomes totally unresponsive.

    I contacted Dyson and they want me to send it in to their service centre to be assessed, which takes days, and then they'll assess how my machine will be up and running again. For a brand new product I just received this week…

    I asked them to send a replacement and I'll return the faulty one but no.

    What horrible service for a DOA product.

  • If anyone has experience with the HP09, could you please share your thoughts? I'm trying to determine if it's truly effective or if I should consider the Xiaomi Air Purifier Pro instead. Additionally, I'm curious about its heating performance during the winter in Melbourne. 🙏

    • +1

      Additionally, I'm curious about its heating performance during the winter in Melbourne.

      These are all resistive heaters, they're a terrible choice as a winter heater. Your exisiting AC unit is somewhere around 4x more efficient as a heater - if you don't already have a split system, then start your heating search here.

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