Missing a magnet on the end of each piece. Still works as I had enough room to overlap.

Ordered this furnace filter slot seal at the recommendation of an HVAC professional. In fact, this particular guy was the first person to ever recommend such a thing!! For years I've noticed "basement" smells, etc. permeating through the registers when the heat or AC is on. It became very noticeable when my house smelled like smoke during the periods of time when we were experiencing poor air quality due to the Canadian Wildfires. After installing the seal, I notice an immediate reduction in odors from my basement. The air quality has dramatically improved and I notice less dust in my house.

The seal comes in two pieces and it is magnetic. You simply attach it to the slot, I started at the top. The first piece went about half way down the length of the slot. I then placed the other side at the bottom of the slot and they met in the middle. Perfect fit!! The filter will be easy to replace because again, they're magnetic so they will never lose their ability to "Re-adhere".

This was a great purchase and one that I highly
recommend for anyone who has their furnace in a basement or other unfinished space.

HVAC didn't have a cover on it and inspector recommended to get this so the dust didn't slip out of the filter slot and go into the house. It is easy to slap on and off to change the filter. Keeps the dust inside the duct where it should be. No issue with the magnets not sticking, covers the whole thing. Easy, no problem.

My system has an angle on one end so this product is not flush. Since the magnets are not pliable. It does not seal one end of my system well. I tried to mold it but ended up breaking it.

This is an amazingly simple invention that finally solves a problem that we had in our house. The area where I slide in my filter in the furnace had big gaps on the sides, top and bottom. To make matters worse there was an opening on both sides of the furnace so that you could install the filters from either side. So the air was getting sucked in from both sides and probably very little was coming in from the cold air returns.

It is beyond me why furnace installers have not figured out a way to fix this problem. I thought about calling someone to build a door or rework the metal so that there was a tighter fit but that would have cost a fortune. This little invention while perhaps not perfect, improved the situation 99%. I still may be getting some air going around the filter inside the cover but at least my system is relatively closed off so I am getting better air flow and I would not be surprised if this cuts down on my bills over time.

This consists of two pieces of heavy duty plastic that measure 4.5" x 14" each. The plastic reminds me of the type that you would find on a pool liner. It's pretty tough but flexible. There is a magnetic strip inside the plastic on one end of each piece and two that run up each side. The magnets inside the plastic being broken into pieces allow you to fold them over in a couple places to get a good fit on your duct.

Depending on how your duct work is constructed this may work better for some than others. I would urge you to take a look at my photos and then take a look at your ducts to see if this will work for you. For me it works perfectly at the bottom but at the top the way they constructed my ducts I have to fold it over and put it on a slight diagonal.

I found that the magnets were strong enough to stick to my duct work but pliable enough that I could bend them at the top where I had issues with the way they fit in order to get a tight seal. They come in two pieces so that they can bend over on each side and still get an exact fit for a variety of sizes. The two pieces overlap enough that there is no air escaping. My filters are 16" at the opening.

One thing I may do to make changing the filters and re positioning the covers easier is to tape the top edge and the bottom edge to the duct. It's not such a big deal for the bottom, but the top edge is wedged in to fit my odd fitting duct work so I think if I did not have to remove it completely to replace the filter that these will maintain a good fit longer.

I felt these were a decent value for what I paid ($8 each) I had to buy 4 so it was $32 but I would have spend a lot more had I called someone to rework the duct area and install a cover. Plus some covers still do not seal off the opening completely.

Thanks for reading my review

Becky Brooks

*I paid full price for this item it was not a free sample