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Model # T400L

Internet # 203633496

400-Watt Electric Wall Panel Heater with built-in Thermostat

This item has been discontinued.
The Home Depot no longer carries this specific product.

$103.49 /each




Model # T400L

Internet # 203633496

Heat your room to the perfect temperature with the T400U, runs of only 400-Watt and has a built in thermostat. Wall-mounted electric convection space heaters that use less than 1/3 of the energy typical space heaters use. An environmentally-responsible alternative to 1,500 Watt space heaters. The heater is mounted 3/4 off the wall to create a convection heat channel. The air between the wall and the panel is heated and rises, drawing cool air from the floor. Also comes with a heat reflector so none of the heat is absorbed by the wall.

  • Includes a stylish built in thermostat
  • Includes a heat reflector for the wall
  • Easy to install
  • Silent-flow natural heating technology no fan
  • A healthy way to heat the room as no dust or allergens are blown around
  • Paintable with wall paint to blend into any decor
  • UL 2021 certified by Intertek (ETL)
  • Paint it to match the color of the wall, easy Install
  • Home Depot Protection Plan:

    Home Depot Protection Plan


Product Depth (in.) 
Product Height (in.) 
Product Width (in.) 
Accessories Included 
Amperage (amps) 
Anti-freeze setting 
Automatic shutoff 
Color Family 
Fuel Type 
Heater Type 
Heating Product Type 
Electric Wall Heater 
Heating Technology Type 
Surface mounted 
Product Weight (lb.) 
15 lb 
Remote Control 
Room Size (sq. ft.) 
Less than 50 
Timer Included 
Voltage (volts) 
Wattage (watts) 
Warranty / Certifications
Certifications and Listings 
4-UL Certified,ETL Listed 
Manufacturer Warranty 
3 Years 


Rated 3.1 out of 5 by 26 reviewers.
Rated 1.0 out of 5.0 by In my experience, these units don't work well. The principle is solid, and the panels are quite attractive, however users complain that they in no way compare to space heaters that have a fan. The Eco-Heater gets quite warm to touch, however the convection doesn't function very well if a fan isn't blowing directly on the heater. I would return these if I still had the packaging. December 9, 2013
Rated 1.0 out of 5.0 by Eco-Heater Convection Heater T400U Unit was delivered without required mounting hardware, installation hardware, or instructions. In addition, product had scores and black marks on the surface, looking like it was previously used.. December 14, 2013
Rated 4.0 out of 5.0 by Good , cheap heat for spare room Mounted quick and plugged it into the outlet as per instructions. Painted it the same color as the wall and you cannot tell its even there. Best part is it did not take up any floor space. built-in thermostat seems to work well. Glad I picked this one. I will pick up another for the cabin up north. October 30, 2013
Rated 5.0 out of 5.0 by Quiet, easy to install I had hoped installing this in the master bath would keep the bathroom toasty while providing some extra heat for the bedroom, too. Unfortunately, that's just asking a bit much. The heater works great for the bathroom when the door is closed, but it really can't do it's job when it's trying to heat both areas. Nevertheless, I am impressed enough with it that I'm ordering a second one just like it for the bedroom. I believe that I'll get the results I need by placing one in each room. January 13, 2013
Rated 5.0 out of 5.0 by Works pretty well You have to make sure to put the temp sensor at the bottom as well as pull the temp sense out, otherwise, it won't read correctly. Does a good job heating up our RV bedroom. I installed it on a wall that was not insulated as per other reviewers recommendations, and think that made good sense. I'm happy enough with it that we're thinking about getting another for the living room. Another suggestion would be to wipe off the powder on both front and back before the first use. You also want to use the heat shield that it comes with. I didn't use the sticky backing.. I just pinned it (literally) to the wall. December 17, 2014
Rated 5.0 out of 5.0 by Great product I have purchased five of these over several years for a variety of uses. The latest was we put two of them in our 8' x 12' shed for an outdoor doghouse/playhouse. We live in a northern state that had several days with below zero temps. last winter with wind chills as low as 30+ below zero. When we went out to play with our dog it was never below 40 degrees and her water dish never froze up the entire winter. December 23, 2014
Rated 3.0 out of 5.0 by Only Good for Small/ Confined Space This is not a heater to heat up a whole room or large space. It should only be used for bathrooms or hallways because it doesn't put out much heat. It warms up the wall and maybe a foot around it. Pluses: Out of the way placement. Space saver. Nothing to trip over or get in the way. Heats the wall. Printable surface. Wall reflector for behind the heater. No noise. Downside: Installation makes it pretty permanent. After you drill it to your wall you better like it there. It makes big holes and the sticky backing on reflector takes off paint. Only puts out enough heat for a confined space like your bathroom. January 20, 2013
Rated 4.0 out of 5.0 by Heater fit our needs perfectly The heater arrived in fine condition as I requested extra packaging due to several website comments about receiving damaged goods due to insufficient packaging. We have a very cold family foyer because there are 3 exterior doors which are mostly glass, the heater raises the room temperature about 10° which brings it to just a bit colder than the rest of the house and is totally acceptable. We haven't received an electric bill so I can't speak to the economy of the unit. March 24, 2015
  • 2015-10-04T11:34:24.750-05:00
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