Comfort at home: It's a must whether you're WFH all day/every day, returning to recharge at the end of one very long day, or just settling in for some flicks and chill. And primary to your comfort? Clean air that's cool and flowing -- or heated -- just how you like it. How to get from here to there? It's not (quite) rocket science. It's the Dyson Purifier Hot&CoolTM HP07 Purifier, Heater and Fan. It combines intelligent sensing -- automatically sensing, capturing, and trapping particulates, gases, and odor -- with an advanced filtration system. And it's all in a 3-in-1 cool-heat-purify package, so it keeps your space comfortable year-round (not just a few months of the year). Now, let's get to the nitty gritty (minus the gritty!). The 360-degree, fully sealed filtration system combines two phases of purification: an activated carbon filter to help remove gases and odors and a HEPA filter that removes 99.97% of particles as small as 0.3 microns. All that is pretty awesome, but it's Dyson's built-in Air MultiplierTM technology that generates the circulation power to draw particles, gases, and odors into the machine in the first place, projecting purified air throughout the whole room. Wanna talk tech? This fan, heater, and air purifier connects to the Dyson Link app via Wi-Fi, mobile data, or Bluetooth wireless technology. The Dyson Link app provides feedback about your home's air quality, and the air quality in your town. And when you're not using the included remote, you can even control it with voice commands with the help of Siri, Alexa, or Google Home! How will I know...when it's time to replace the filter? Dyson recommends replacing your filter every 12 months, as over time, filters can get clogged with pollutants, reducing airflow and its ability to absorb odors. Conveniently, your air purifier alerts you when your filter needs replacing! From Dyson.