This under rug heater changed my rv floor from a barely usable space in the cold to warm and livable. A rug gripper is required so have that on hand or order. Allow a 1" margin all around the 24" wide runner ( I purchased) . Tape is included with heater, to tape it to gripper pad. Your rug must overlap heater and gripper. The 170w doesn't trip the breaker like a space heater. Comfortable to stand on. 5 stars!!

Super cozy. It keeps the dogs off the couch(they prefer to lounge on the carpet now.

In this review, I'll explain the room this is installed in, what problem I was trying to solve, why this product is better than alternatives, how I installed it, and how I use it.

My room: I'm using this in a large basement where I work from home every day in a northern climate. Not all the walls are insulated and the floor under me is carpet + pad on top of cement. It's heated, but poorly. In the winter, it's common for the room to be around 64-66*F. I have a 120V electric oil radiator heater that can bring the temperature in my office up to around 72*F, which still feels a bit chilly due to the radiating cold from the walls and the floor.

The problem: My hands and feet physically ache by the end of the day in the winter because they're so cold from the walls and floors being so cold, despite the ambient air temperature being 70-72*. (Physics lesson: all surfaces provide heat through infrared radiation. When surfaces are cold, they don't give off as much heat so your body emits more IR than it receives and thus: you're cold. Even if you have a carpet under your toes that doesn't feel cold or you're sitting 10' away from a poorly insulated wall, the lack of IR from the cement under the carpet and the cold wall drastically impacts how cold you feel. This is why houses feel significantly colder in the winter despite the ambient air temperature being the same.)

My experience: I bought an under rug heating mat from a different company that cost slightly less than this one, but it only lasted around a year before it burnt out. They offered to repair it for free, but the cost of shipping to them and paying for return shipping would have been almost the cost of a new heater. I have degrees in engineering and electrical engineering is a hobby, so I decided to just take apart the module myself and fix it myself. It ended up being a severed wire in the rug from where I roll my chair, but after seeing how thin the wire gauge was and how thin the insulation was, I opted to not keep using it and started searching for another under rug heater with thicker wires/insulation.

Enter Cozy Winter. The wiring on this unit is _substantially_ better than the previous under rug heater I was using and that alone absolutely makes the price justifiable. It also has in-line GFCI protection, which is an absolute must for something like this. My previous heater wasn't GFCI, but the circuit was -- but having it built-in and seeing the quality job of the wiring gives me a lot more confidence that they had real expertise when designing this product and confidence that it's not going to break after a year, catch fire, or injure me should I sever another wire and make contact with it.

I installed the rug heater over their insulated pad and under a large wool rug where I sit at my desk. The insulation is absolutely necessary to avoid losing heat to the cold surface under the heater. From there, I have it plugged into a smart outlet that's rated for more amperage than this rug uses and it turns on during the week when I think I might be downstairs. My work schedule varies, so I just set it to turn on for 14 hours a day M-F and manually turn it on Saturday/Sunday if I go to my office.

My Suggestions/Explanation: A lot of reviews here complain that it doesn't get very warm and that's really missing the point. You'll be able to feel that the rug is warm and it may raise the ambient air temperature in your room, but the rug will not be hot to the touch because the point is radiant heat. Because the floor under me is warm, I have warmth radiating toward me making my feet/legs/hands much more comfortable. Even if I turn off my radiator heater in the winter, the air temp in the rrom drops significantly but the aches in my hands and feet are gone thanks to this rug heater.

If you buy this product, buy the thermal insulation pad to put under it or install some sort of insulating pad under it. This will ensure you're not losing heat to the ground because you want to warm you up not the floor.

If you're skeptical this is doing anything: turn off the rug, let it cool off, and try sitting in the room for an hour. Then turn the rug on, let it get warm, and try sitting for another hour. You'll notice you're probably a lot more comfortable this time due to the radiating heat from below you instead of the radiating cold below you.

I even use this rug in the summer because the cement under the rug is still too cold to sit on for hours a day and I can tell within a half hour if I forgot to turn the rug on over the weekend.

Put in 2nd floor of garage. Wanted something to safely keep my electronics warm (>50F) at night during winter. I was skeptical but this worked. You have to be patient but it does the job. Glad I went with this and not something more expensive

Great product, great service! Thank you!