![Technology inside a Dyson purifier fan heater](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?$responsive$)
Pure Hot + Cool 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?$responsive$)
![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/overview/air-quality-pure-hot-cool-technology-machine-top-fahrenheit.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/overview/air-quality-pure-hot-cool-technology-machine-base-fahrenheit.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 2.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?$responsive$)
-
Forward projection
Delivers a powerful stream of cooling, purified air from the front of the machine.
-
Backwards airflow projection
The machine diverts air through the rear annular at a 45˚ angle, creating a backwards airflow.
Buy from Dyson.com
¹Tested for air projection (DTM801), purification coverge in a 2860ft³ room (TM-003711), and heating performance in a 1236ft³ room (DTM961).
²In maximum setting. Tested for air projection (DTM801), purification coverage in a 2860ft³ room (TM-003711), and heating performance in a 1236ft³ room (DTM961).