Does the Lasko HF25630 use a HEPA filter?

No. It uses a carbon filter for odors, plus a UV light and an ionizer. Shoppers who need HEPA-grade particle capture should look at a HEPA purifier instead.

How large a room will it handle?

Lasko rates it for rooms up to about 200 square feet. That fits a bedroom or small office, not an open-plan living area.

Is the ionizer safe to leave on?

Ionizers can produce small amounts of ozone. If that concerns you, run the unit without the ionizer or choose a purifier without one.

Does it come with a remote?

Yes, a remote control is included, so you can change fan speed from across the room.

How often does the filter need changing?

Carbon filters typically need replacing every few months depending on use. Check the filter indicator and swap it when odors return.

How does it compare with a HEPA tower purifier?

It is better at odors than fine particles. A HEPA tower cleans dust, pollen and smoke particles more thoroughly but usually costs more and needs pricier filters.