The Objecto H4 is an ultrasonic humidifier with a unique hybrid design. Rather than releasing a standard cool mist like other ultrasonic units, the H4 first heats the water to 60 °C to sterilize it. It has a water tank with a usable capacity of 1.7 L (0.4 gal), and the manufacturer advertises it as suitable for rooms up to 450 ft2 in size. It also features an automatic off function for when its tank runs out. You can add a few drops of essential oil to the built-in aromatherapy tray for a scented mist.
The Objecto H4 is a passable choice for general home use. Its capacity is somewhat on the lower end of the scale, so you’re best using it within small to medium-sized spaces, like bedrooms or offices. It’s a bit of a chore to clean properly, though it’s also nowhere near the worst in this regard. Pros: – Comes apart easily. – Has an auto-off function. Cons: – Poor efficiency. – Limited capacity. – Has many parts that need cleaning. – Runtime is a little on the short end of the scale.