Dyson Purifier Hot+Cool HP1 Review: Heater, Fan, Purifier (vs HP07)

HP1 vs HP07

The HP07 (2021) and the HP1 work the same way: air is drawn through a cylindrical glass HEPA and activated carbon filter in the base, then pushed out of the loop either as a cooling stream or over a ceramic heating element. Both are on the California Air Resources Board's list as mechanical air cleaners, the HP07 under certification G-22-240 and the HP11 under G-24-318. Dyson's current US range lists the HP1, so it is the one to buy new; an HP07 at a discount from a reseller is a reasonable buy only if the warranty terms are clear.

Dyson lists the HP1 at 30.1 in tall and 11.7 lb, with 350° oscillation, app control and a remote. One Dyson page gives 12.5 lb for a different finish; the difference is small.

No CADR, and why that matters

Dyson does not publish a CADR for the HP1, and the AHAM Verifide directory listed no Dyson models when we searched on November 3, 2026. Dyson's "76 gallons per second" figure describes the fan stream it projects, about 610 cubic feet per minute of moving air, most of it room air pulled along by the loop rather than air that has passed through the filter. It is not comparable with a CADR. What Dyson does state is that the filter captures 99.97% of particles down to 0.3 microns and that the whole machine is sealed to HEPA H13, so filtered air is not diluted by leaks.

The practical upshot: use the HP1 to purify a bedroom or office, not a big living space or a home on a wildfire smoke day, where you want a certified high CADR. Our CADR guide explains the measurement.

As a heater

Dyson says the HP1 heats a whole room evenly in winter. Like any plug-in space heater, it uses far more power heating than purifying; Dyson does not print the wattage on the pages we read, so check the rating plate on the unit, plug it straight into a wall outlet rather than an extension cord, and follow the manual's clearance rules. The US Consumer Product Safety Commission's advice for any space heater applies: plug it directly into a wall outlet, never a power strip, and keep anything that can burn at least three feet away. Using the HP1 as a heater is a cost decision too: an electric heater adds to the power bill in a way a purifier does not.

Noise

Dyson lists a sound level of 63 dB for the HP1, which is the loud end of its range; purifiers like the Blueair 411i Max quote 46 dB on high. On low settings the HP1 is far quieter, but Dyson does not publish a low-speed figure on the pages we read.

Filters

Dyson's parts pages list the 360 Combi Glass HEPA + Carbon filter (965432-01) at $79.99 as compatible with HP1 and HP11 models, and a separate HP1 parts page lists a HEPA + K-Carbon filter (974527-01) at $89.99. The two pages are not consistent, so enter your model in Dyson's parts finder before ordering. Dyson recommends replacing the filter every 12 months or when the machine notifies you.

Dyson HP1 vs the alternatives

CADR from AHAM's directory; Dyson publishes none.

Model	Smoke CADR	Heater	Fan
Dyson Purifier Hot+Cool HP1	Not published	Yes	Yes
Dyson Purifier Cool PC1	Not published	No	Yes
Levoit Core 400S-P	234 cfm	No	No
Blueair Blue Pure 211i Max	435 cfm	No	No

Who should buy the Dyson Purifier Hot+Cool HP1

• Buy it if it replaces both a space heater and a fan in a bedroom, nursery or office, and you want one machine on the floor all year.
• Buy it to replace an HP07 that has died; same concept, current model.
• Skip it if purifying is the main job; a certified purifier plus a separate heater costs less and cleans more air.
• Skip it if you only want a cooling fan with purification; the Dyson PC1 costs less.

For purifiers chosen on certified figures, see our best air purifiers.