VIVOSUN1500W Portable Greenhouse Heater with Adjustable Digital Thermostat, 1500W/750W Electric Heater with 3 Modes for Fast Heating, Overheat Protection and Dust Proof for Grow Tent, Patio, Outdoor

You almost forget it’s on because it is very quiet. Puts out plenty of heat! The size is perfect for small places. I recommend!

Update: Thermostat stopped working correctly after about 2 1/2 months. Contacted company via email and the problem was resolved. Good company.Heats tent quickly and the temp probe works nicely; other reviews had me worried about it causing excessive on/off cycles. I wish that there was more installation options - maybe outside of the tent with the warm air blowing into a vent.

Instructions say to keep the temperature dial set at "Max" and to never adjust to any other setting. Okey Dokey! At max setting this thing does not put out very much heat, it certainly looks the part ...looks like an industrial heater w/ it's bazooka can styling. The heat unit I paid $40 at Target works so much better. This is garbage. I bought as a second room heater for another room in our house, you can feel the heat if you stand about 1 foot in front of it.---UPDATEThis thing could have caught my house on fire. Using it in a small room had it on for 15minutes and smoke started coming out of it. It tripped the house fuse panel (thankfully). When I went to unplug it the chord was extremely hot. I have since thrown this piece of garbage into the trash. How this is being sold on Amazon is beyond me. THIS IS AN EXTREME FIRE HAZARD. NOT UL LISTED EITHER.

Bought 2 of these in preparation for the “arctic” weather predicted to hit Houston. I have 2 lemon trees - that while small - produced almost 200 lemons this season and I wanted to protect them. Together with my portable greenhouses (also from Amazon) - I placed one of these heaters inside each greenhouse - setting it on a concrete block (up off of ground and away from any potential ground moisture) about 4 feet from each tree. I used a heavy duty outdoor extension cord for power. Set up an outdoor camera in each greenhouse - which reads the $10 (Amazon) thermometer also placed inside of each greenhouse. So - I can monitor the temperature of the greenhouse without going outside in the frigid - below freezing weather. You gotta love technology!!READ the instructions.#1 - turn on the fan mode for 30 seconds.#2 - turn on the low mode#3 - then turn on the high mode (if you want high)At this juncture, very happy with my purchase.

The heater comes with a seperate temperature controller/thermostat. The small 15KW heater is adequate for a 6ft by 10 ft greenhouse. The seperate electronic thermostat has a high tempeature alarm but will not shut down heater when at high temp. It also has a very narrow band of 1 or 2 degrees. It thus tend to cycle the heater on/off at a high frequent rate. The heater itself does its job well and appears like a quality product. The separate electronic contrller is really not usable. its frequent on/off cycle will wear out the heater.

The heater has been in the greenhouse for a while and is working great.

I use this in a small greenhouse and it threw a lot of heat for the poinsettias I was trying to keep alive. I am eager to use it again in the spring to get my seedlings started.

Use it to heat up a 6 foot by 8 foot area never reached temperature stayed running the whole time it didn't put off much heat and I had it turn on high Ive bought a similar one from a different company that had a little bigger heater and that one works just fine don't waste your money on this one

Works as intended so far

Instead of this product I'm using a lower end oil filled radiator heater that i bought on Amazon. The greenhouse is water tight and the only moisture is inside. It's working much better than the vivosun which will be a portable heater laying around the houseI’m usually confident that when I buy a vivosun product it will be of good quality. This time I’m wrong. It feels cheaply made and the air flow is minimal. It’s just a glorified space heater sold as a specialty greenhouse heater, reflected in the price. I can’t imagine it being of any use to a greenhouse bigger than 6’ x 4’.