![Dyson Pure Hot+Cool™ purifier fan heater technology cutaway](https://dyson-h.assetsadobe2.com/is/image/content/dam/dyson/products/air-treatment/pure-hot-plus-cool-2018/Technology/air-quality-pure-hot-cool-heater-technology-fallback.jpg?$responsive$)
Technology
Advanced purification and even room heating
360˚ sealed filtration. Removes gases and pollutants.
The fully-sealed filtration system combines an activated carbon filter and a glass HEPA filter. They work together to lock in gases and pollutants, preventing dirty air from leaking back into the room.
![Close-up of glass HEPA filter](https://dyson-h.assetsadobe2.com/is/image/content/dam/dyson/products/air-treatment/pure-hot-plus-cool-2018/Technology/air-quality-pure-hot-cool-technology-hepa.jpg?$responsive$)
![Close-up of activated carbon filter](https://dyson-h.assetsadobe2.com/is/image/content/dam/dyson/products/air-treatment/pure-hot-plus-cool-2018/Technology/air-quality-pure-hot-cool-technology-carbon.jpg?$responsive$)
![](https://dyson-h.assetsadobe2.com/is/image/content/dam/dyson/products/air-treatment/pure-hot-plus-cool-2018/Technology/air-quality-pure-hot-cool-indoor-pollution-techcutaway_TEST.jpg?$responsive$)
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Some purifiers and heaters only treat the air surrounding them
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Dyson Pure Hot+Cool™ heats and purifies the whole room²
When purifiers and heaters don't distribute air through the room, areas can be left unheated and polluted. Dyson purifying fan heaters mix and circualate the air, so they heat and purify the whole room evenly.²
![Looking inside the Dyson Pure Hot+Cool purifier fan heater](https://dyson-h.assetsadobe2.com/is/image/content/dam/dyson/products/air-treatment/pure-hot-plus-cool-2018/Technology/top.jpg?$responsive$)
![Looking inside the Dyson Pure Hot+Cool purifier fan heater](https://dyson-h.assetsadobe2.com/is/image/content/dam/dyson/products/air-treatment/pure-hot-plus-cool-2018/Technology/bottom.jpg?$responsive$)
![Demonstration of Air Multiplier™ technology](https://dyson-h.assetsadobe2.com/is/image/content/dam/dyson/products/air-treatment/pure-hot-plus-cool-2018/Technology/air-quality-pure-hot-cool-technology-air-multiplier.jpg?$responsive$)
![Cutaway of Dyson purifier](https://dyson-h.assetsadobe2.com/is/image/content/dam/dyson/products/air-treatment/pure-hot-plus-cool-2018/Technology/air-quality-pure-hot-cool-technology-airflow-modes_1.jpg?$responsive$)
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Forward projection
Delivers a powerful stream of cooling, purified air from the front of the machine.
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Diffused projection
The machine diverts air through the rear annular at a 45˚ angle, creating a diffused airflow.
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Direct from Dyson
¹Tested for filtration efficiency at 0.1 microns (EN1822).
²Tested for air projection (DTM801), purification coverage in a 81m3 room (TM-003711) and heating performance in a 35m3 room (DTM 961)
³In maximum setting. Tested for air projection (DTM 801), purification coverage in a 81m3 room (TM-003711) and heating performance in a 35m3 room (DTM 961).