The Dyson Pure Hot+Cool HP4B is a multifunctional air purifier, heater, and cooling fan designed for small to medium-sized rooms up to 290 square feet. This Costco-exclusive variant of the HP04 model intelligently purifies, heats, and cools using Dyson's Air Multiplier technology to circulate purified air throughout the entire room.

The device features a 360-degree Glass HEPA H13-grade filter combined with an activated carbon layer that captures 99.97% of particles as small as 0.3 microns, including ultra-fine dust, allergens, and pollutants. It includes advanced onboard sensors that monitor and display real-time air quality data including PM2.5, PM10, volatile organic compounds (VOCs), nitrogen dioxide levels, temperature, and humidity.

Equipped with Wi-Fi connectivity, the HP4B can be controlled remotely through the MyDyson app or via voice commands using Amazon Alexa, Apple Siri, or Google Home. The tower-style unit stands 30.1 inches tall and weighs 12.54 pounds, featuring 10 fan speeds for both cooling and heating modes, oscillation capability, and a magnetized remote control that stores on top of the unit. The LCD display includes a color-coded air quality indicator strip (green for good, yellow for fair, orange for poor, red for bad) and can be dimmed in Night mode, which also adjusts the fan to its quietest setting. The device operates on 120 volts with a 6-foot power cord and carries a CADR rating of 80 for dust.