Instruction: Evaluate the answerability of a question by analyzing the related document, outputting yes if the document contains information addressing the question, and no otherwise.

Input:
Question: Can it be mounted vertical?  Have 18 gun safe full of long guns. The only room is on one side and maybe the top.  Would like to mount vertical.
Document: It's a rod that gets warm... If you have power in you safe and the room on the floor there isn't anything else I could say. I do wish there were a better mount or stand because the one in the package is straight cheesey, it works but doesn't give a lot of mounting options.
I have one of these for my Gun safe and purchased this one for my metal ammo cabinet. I had purchased one of the plastic ones and was very dissappointed with it. The Goldenrod is a much better product. It heats consistantly and evenly throughout my gun safe. It keeps the humidity way down to around 15-20% depending on the time of year it is. I would highly recommend this product to anyone who wishes to lower humidity in a gun safe or metal cabinet. Rust kills guns and ammo.
I am using one of these in a vehicle stored in a garage that is not climate-controlled, where it tends to stay humid. Last year, both stored vehicles developed a small amount of mold on surfaces that are frequently touched (steering wheel, door handles.) I cleaned all surfaces prior to storage this year, and added the 18&#34; GoldenRod raised just above the front drivers side floor. Initially I was skeptical that the mild heat source would make a difference.
I have it in a safe in a cold garage during winters and it works very well keeping temperature warmer then outside temperature by about average of 9 degrees. No rust on guns at all. I also put portable condensate containers in safe made by Remington, but the golden rod keeps everything warm which is the key to control. Easy to install, doesn't get in the way, low on power, nice looking, works like a charm, and would buy another if needed.
This unit is, essentially, a heating rod. I think that to call it a dehumidifier can be misleading. It does not remove any humidity, it only warms the surrounding air. This does have the effect of a lower RH than the exterior of my gun safe so I suppose the label is semantics. I use the 18&#34; model in my gun safe. the safe has a volume of ~ 30 ft^3, ~ 48 guns.
I imagine you could mount it vertically but they say to place it on the horizontal so I have not tried. Remember it is hot to the touch so don't lay anything on top or against it. The first one I bought is 8 years old and still going strong- will buy more when needed.
This is the trick. By the way I have a 80 gun safe and it keeps it warm, so I am sure it would keep a smaller safe warmer, but I don't know for sure. It more of a heater then a dehumidifier in my opinion but I will tell ya with a condensate Remington container and a golden rod you will be 100% protected, Buy it if you love your guns and don't want rust on the.
My safe is in my garage. Its a 40 gun cannon and I was worried about having it in the garage until my Dad told me about these. I have mine mounted on the bottom of the safe and it keeps the whole thing nice and warm and dry.
I tried a 12&#34; brand X that was marketed as large enough for the capacity of my safe. It got warm but did not come close to being adequate. I use it now to warm my hands when working with bare hands on a cold day. The Goldenrod is doing a good job, but like others have suggested, buy the largest one that fits unless you keep your safe in a heated environment. They're inexpensive to run.
Works  good just as advertised,thanks.Also fast shipping on Amazon and I would recommend this to anyone.I also would recommend to buy the small one as it is plenty for a safe.
Answer: yes