Which Roomba for 1,750 sq feet lower level with dark brown hardwood floors?

Get the 650. No need to overspend if all you need is a vacuum to keep things tidy. Hardwood is easy for roomba. 1750 sq ft is kind of a lot for one battery life to really give a good pass over everything, though. So consider how you want to use roomba.

It's going to come down to how much work you want it to do in a single cycle, how often you want to run it, and how much you want to interact with roomba.

If you don't mind tinkering and figuring out how best to divide up your house into parts, then use the lighthouses to confine it to a certain area; let it do a cycle in that chunk of the house; then, move the lighthouses, then run roomba, and so on. You might have to carry roomba to parts away from the charging station, and then find it and take it back to the charging station when it runs out of battery.

There are extended life batteries available if you wanted to make those chunks of your house bigger or have roomba be able to have more time to clean.

If you just want to press start and have roomba do everything at once and not have to mess around with light houses you could just run it daily (or whatever does the job) in the whole space and expect its day to day efforts to cross over and combine for an end result. One thing, while this can happen with both methods, this method increases the chance that roomba will get lost and run out of battery in the corner or under the couch. The bigger the cleaning area the more places for roomba to hide under and run out its battery.

Again, an extended life battery would would get you more coverage on a single charge.

A top of the line Roomba 980 can be programmed to do a room, return to the charger, go do another room, return to the charger, then go do another room, until it is done with all the rooms. It's got Wifi, too, so you can start it remotely, check it's progress, and all that stuff. They are pricey.

Or, you could get something supposedly smarter like the Neato Botvac. It's got lasers. It apparently uses more efficient navigation to optimize the path it uses and does more work on a single battery charge. Still don't know how it would do in 1750 sq ft on 1 battery cycle.

/r/roomba Thread