Instruction: Given a question and the related document, and generate the answer to the question based on the information provided in the document.

Input:
Question: 8x10 addition...Will this AT LEAST keep pipes from freezing within the wall that it would be mounted on, if mounted over the location of the pipes?ty
Document: The wall above the heater is always extremely hot. The heater was mounted on an inside wall. We do live in NY but I would have expected much better performance. Now they want to charge a 15% stocking fee and also deduct the amount they paid for shipping plus I need to pay to send it back.
I bought one of these heaters for my mom to keep her bedroom at a more comfortable temperature. During the winter months she uses a wood burning stove as the main source of heating. Her bedroom is on the other side of the house and normally gets really cold. I bought and mounted her heater in minutes! It was super simple to mount.
I purchased my Envi Heater for this winter season and ordered it just in time. A cool front came through last night and I cranked on the Envi, which I have mounted in my bedroom, and was toasty all night long as the outside temperature dropped to freezing. I turned off the central heating in my apartment and left this one on and had no issues whatsoever. I can't wait to see my electric bill this month now that I have switched from central heating to a low wattage Envi Heater!
I installed this heater in my 12 x 12 office. The room is very insulated. I had no problems heating this room with my old heater. Unfortunately it quit after 10 yrs. I seen great reviews on this heater. No one mentioned the horrible smell the heater gave off for 3 days. I could not plug it in somewhere else to burn off since it had to be mounted to the wall to run.
This not a condemnation of the heater. It's good for small areas. The fact is I bought these heaters for my apartment building and my office...18 of them to be exact. I read all the &#34;raving&#34; reviews and thought it was the best choice to have without running new pipes through the building. Some one said it warmed up a log cabin and I assumed it would do the same for our apartments here in New Jersey.
My bathroom is 8' by 10' and cold. Even turning this heater on, with a timer, a few hours before I got up  did not make any noticeable difference in room temperature. I live in California where we don't have extreme cold but even here this wall heater is not making it. Would not recommend this.
And if the wall isn't perfectly flat, enjoy the process. I wouldn't want to try and hang these in an older home with wavy plaster walls. Terrible design!Now that the units are hung and running, I must say, they are not so hot and for a heater, that isn't a good thing. I have one unit in a small retail room which is 8'by 7' and we still are running our heat in that room or it would be too cold.
if you are heating anything more than a closet,keep looking.By the way,they don't answer there phones either.This afer 2 months has quit all together.junk!
As for the rest of the house we keep the furnace at a lower temp which eliminates the need to have the furnace cycling on and off day and night heating the entire home.
I mounted it behind her bed so you don't even know its there! The design is sleek, the heater is super quiet, and cool to the touch. Well done eheat. I'm going to continue to tell my friends and family about your amazing heater.
Answer: The Envi works by reflecting heat on the wall it is hung on.  The wall ABOVE the envi gets fairly hot!  That hot wall is what heats the room... more so than the heat escaping from the Envi.  I've located my Envi about a foot above a hot water baseboard that I was concerned about.  I'm not running that hot water baseboard much, so I've been afraid the pipes would freeze.  That's why I installed the Envi!  So far, in my application of a far bigger room, and installing the Envi on an OUTSIDE wall, I haven't frozen any pipes.  Tomorrow?  We'll see!  If you use yours differently, and don't leave it on, your mileage could vary as well!  There are few guarantees in life!