Under Furniture Magnetic Vent Extender, 1.5mm Thick Heavy Duty Premium Material, Fits Floor Registers 10" and 12" Wide, Adjusts from 17" to 33" Long (1-Pack)

I put this under a bed that really couldn't go anywhere else. But first I accidentally stomped on it really hard (on the extender part). Nothing happened. It didn't even dent. Also, it works. I can feel the air just fine. This is just genius, and well made, even though it doesn't feel like it (it's thin). The magnets stick well. I'm impressed. Worth it.

This is exactly what we needed! It does a fantastic job redirecting the airflow from under our furniture and pushing it out into the room. In our living room and bedroom, every piece of furniture ends up sitting over a vent, and this has been a must-have solution. The magnetic attachment makes it easy to install and keeps it securely in place. Since adding these, we’ve noticed a big difference in how evenly the rooms heat and cool. Simple idea, but it works great—highly recommended if you have vents blocked by furniture!

This does what it is designed to do. It directs the air floor from the vents in the direction we wanted. It can expand and contract. However, the material is pretty flimsy plastic, and there's nothing keeping the two parts together but the fact that they fit inside each other. Also one of the magnets fell off at some point after we'd had it for months. Still, for the price, I can hardly complain.

Works well. I used it under a desk in my office. Directs the heat out to the room instead of under the desk. Magnets to the floor vent, so easy to put on.

It is very effective -- just a little too high for the base of our couch so I just raised the couch an inch or two with some wood blocks. :)

Update: perfect example of why it can benefit you to submit reviews. The seller saw my review and contacted me about their updated product they are in the process of releasing. They sent me a partial refund since I didn't feel I got my money's worth. They totally didn't have to do that... they did it because that's what smart business minds do when they care about a happy customer (my words, not their's). This was not a recent purchase and it clearly wasn't high enough on my priority list to try to return it, but they made things right anyway. (Can't remember another company doing that in the last 5 years). If you're looking to support a business that cares about a quality product and happy customer, keep Spectrum Products LLC in mind. It works as it should... but the little double sided adhesive stickers... are so small they didn't make it through the first day. I'll add new ones and another magnet... but it directs the air the way it should for an easy fix. One of those "get what you pay for" items.

Awesome and allows us to have our couch over a vent against a wall. Durable plastic, connects well with the magnets to the vent. We have it where we have lvp and the air flow is great!

Easy to install and if you have to Modify can cut down easily or extend to fit your needs! Well made

These work perfectly.

Had to trim a bit but it worked great under our dresser.

It does the job under by daughter's dresser. However, it feels like it should be about half the listed price.

Ecellent brings heat under couch.

This is a costly item for a piece of plastic but it works so well you will soon forget the cost. The magnets are strong and the glue stickers to customize the desired length are a fantastic.