How large a room can the MinusA2 SPA-780A clean?

Rabbit Air rates it for rooms up to about 700 square feet. Real-world coverage is lower in rooms with open doors or heavy particle loads, so size down for a bedroom and up for open-plan spaces.

What filters does it use, and how often do they need changing?

It uses a pre-filter, a medium filter, the BioGS HEPA filter, a custom filter panel and an optional ionizer. Rabbit Air suggests replacing the HEPA filter roughly once a year and the custom panel about every 12 to 18 months, depending on use.

Can it be mounted on a wall?

Yes. It ships with a wall-mount bracket and can sit on the floor or hang on a wall. Wall mounting saves floor space but makes filter changes a bit less convenient.

The ionizer is optional and can be turned off. It produces trace ozone, so people with asthma or sensitivity may prefer to leave it off; filtration still works without it.

Does it have Wi-Fi or app control?

No. The SPA-780A has a remote control and onboard sensors but no Wi-Fi or app. If you want scheduling and air-quality tracking in an app, newer purifiers offer more.

How does it compare with the Rabbit Air BioGS 2.0?

The MinusA2 is larger, covers more space and adds the swappable custom filter panel. The BioGS 2.0 is smaller and cheaper to run but suits smaller rooms.