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Dyson Purifier Hot+Cool Purifying Heating Fan HP4B | White/Silver | RefurbishedThe Dyson Purifier Hot + Cool intelligently purifies, heats and cools you. The Dyson Purifier Hot+Cool purifying heating fan automatically senses and reacts to changes in air quality, then reports pollution in real time on the LCD screen and on your MyDyson app. ² The 360° filtration system uses activated carbon to remove gases and odors and a HEPA filter to capture 99.97 % of particles 0.3 microns in size.
¹ In Maximum setting. Tested for air projection and purification coverage in a 2860ft3 room, and heating performance in a 1236ft3 room.
²Requires device to run app, Wi-Fi or mobile data, Bluetooth 4.0 support, and iOS version 10 or Android version 5 (or above). Standard data and messaging rates may apply. 6 Month Dyson Official Warranty.
Features: Senses.: Automatically detects airborne particles and gases, then diagnoses and
reports them in real time. Captures.: HEPA filtration system captures allergens, pollutants, gases and smoke. Fully sealed to HEPA H13 standard. So what goes inside, stays inside. Projects.: Projects purified air throughout the room. Air Multiplier technology generates the circulation power to draw distant pollutants into the machine, projecting purified air throughout the whole room. ¹Heats.: The Dyson Purifier Hot + Cool purifies, heats the whole room, and cools you. Heats with thermostatic control - monitoring the temperature in the room and adjusting in the winter to bring heat the room to the right temperatureCools you in summer.: In warmer weather, a powerful stream of purified airflow can cool you down. Night-time mode.: In Night mode, the machine monitors and purifies using the quietest settings, with a dimmed display. Program your machine to turn off after pre-set intervals between 30 minutes and 8 hours. Oscillates up to 350.: Adjustable oscillation angle from 45 to 350, to project purified air
around the whole room. Remote control.: Curved and magnetized to store neatly on top of the machine.
In The Box: Remote Control (Color may vary), 360 Combi Glass Filter
¹ In Maximum setting. Tested for air projection and purification coverage in a 2860ft3 room, and heating performance in a 1236ft3 room.
²Requires device to run app, Wi-Fi or mobile data, Bluetooth 4.0 support, and iOS version 10 or Android version 5 (or above). Standard data and messaging rates may apply. 6 Month Dyson Official Warranty.
Features: Senses.: Automatically detects airborne particles and gases, then diagnoses and
reports them in real time. Captures.: HEPA filtration system captures allergens, pollutants, gases and smoke. Fully sealed to HEPA H13 standard. So what goes inside, stays inside. Projects.: Projects purified air throughout the room. Air Multiplier technology generates the circulation power to draw distant pollutants into the machine, projecting purified air throughout the whole room. ¹Heats.: The Dyson Purifier Hot + Cool purifies, heats the whole room, and cools you. Heats with thermostatic control - monitoring the temperature in the room and adjusting in the winter to bring heat the room to the right temperatureCools you in summer.: In warmer weather, a powerful stream of purified airflow can cool you down. Night-time mode.: In Night mode, the machine monitors and purifies using the quietest settings, with a dimmed display. Program your machine to turn off after pre-set intervals between 30 minutes and 8 hours. Oscillates up to 350.: Adjustable oscillation angle from 45 to 350, to project purified air
around the whole room. Remote control.: Curved and magnetized to store neatly on top of the machine.
In The Box: Remote Control (Color may vary), 360 Combi Glass Filter
Warranty & Returns
Warranty, Returns, And Additional Information
Warranty
- Please contact the Seller directly for warranty information. Warranty information may also be found on the Manufacturer's website.
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Return Policies
- Return for refund within: 30 days
- Return for replacement within: non-replaceable
- This item is covered by Dyson Return Policy
Manufacturer Contact Info
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The Dyson Purifier Hot+Cool HP4B is a room air purifier, thermostatic heater, and cooling fan for people who want one appliance for year-round air circulation and comfort, with real-time air-quality monitoring and sealed HEPA H13 filtration.
Recommended For
- People furnishing a small room who want one appliance for air circulation, supplemental heat, and air filtration rather than separate devices for each job.
- Desk-side or bedside users who want airflow directed around a room and occasional supplemental warmth, with remote or app control and an adjustable sleep timer.
- Users who want to see air-quality readings and let the purifier adjust its fan automatically, rather than choosing settings only by feel.
- People who want a fan-like breeze in warm weather, but do not need the device to lower the room temperature like an air conditioner.
Real-World Use Scenarios
- In a chilly home office or living room, use the heater to add room warmth without turning up the central heating for the whole home; it provides thermostatically controlled supplemental heat, though it is not a replacement for whole-home heating.
- On a warm day, run it as a fan to circulate air and feel a breeze while working or relaxing; it can improve personal comfort, but it does not function as an air conditioner or lower the room temperature.
- For a room used through changing seasons, keep one unit available for heating in colder weather and fan airflow in warmer weather, with air purification as an additional function; this can reduce the need to keep separate heater and fan units in that room.
- In a bedroom overnight, use Night mode and the sleep timer for dimmer, quieter low-speed operation; note that the heater can be noisy, so heating overnight may be less comfortable for noise-sensitive sleepers.
- When indoor air quality changes, such as during cooking or cleaning, leave the purifier in Auto mode so its sensors can detect changes and adjust operation; treat this as supplemental air cleaning, since independent testing found the HP4B’s particle-cleaning rate is limited.
Spec Summary
| Attribute | Value |
|---|---|
| Best For | Room air purification with real-time particle and gas monitoring, plus whole-room heating and cooling |
| Air Purification And Monitoring | HEPA H13 filtration captures allergens, pollutants, gases, and smoke; automatically detects airborne particles and gases and reports them in real time |
| Heating And Cooling | Thermostatically controlled heating adjusts to the room temperature; purified airflow provides cooling in warmer weather |
| Airflow And Oscillation | Air Multiplier technology circulates and projects purified air throughout the room, with adjustable oscillation from 45° to 350° |
| Modes And Scheduling | Night mode uses the quietest settings with a dimmed display; sleep timer offers intervals from 30 minutes to 8 hours |
| Color And Dimensions | White; 30.08 in tall and 12.54 lbs |
| Model Identifiers | Dyson HP4B |