Instruction: Analyze a question and its supporting document. Predicting answerability based on the information provided in the document. Output yes if the document contains relevant information to answer the question, otherwise output no.

Input:
Question: How short do they come in?
Document: works great and easy to install and electric is less then my fuel oil bill has ever been. great Buy,
You must buy a thermostat and be sure you've got at least AWG 14 supply line (15 Amp) as this is a 500 watt 4+ Amp heater. Easy installation for the DIYer proficient in household electrical wiring. NOT recommended for person expecting to just screw this into a wall joist and plug it in... as this is not a plug-in unit and you must purchase a thermostat.
Too expensive to return.
This unit works geat in a small space.Good unit for smaller bedrooms ect. Just what I was looking for! !Recommend to anyone.
This is a small baseboard heater that works really well in a bedroom. It is very easy to install (20 minutes max) and works great!
This heater I was told ran up the electric bill. So when I picked it up from the post office I ask how should I return it. The postal worker said, do not open it just refuse it. So I did, and now after talking to their customer service.... I have to pay shipping to and from plus 5 bucks to put it on their shelf. Should have kept it and sold it on craigs list. I have still to see the half of my money back.
The problem with this type of dial is that the heater will always remain on (unless you turn the dial off). So for instance, even on the lowest "LO" setting, it's still running, and in the case of my closet, even "LO" makes it hot.
The only solace is that the units look good where they are installed.
The installation seemed easy for the electrician who came to install 2 units: 1 in the hallway and 1 in the bathroom. Both seemed to be working well, but since winter is over, the real test will be how well they perform next winter. Our electrician said to leave the heater on for a few hours following installation to burn off some oils from the factory. Overall, the heater and thermostat units are cheap $60 compared to the labor to install ($200).
The heater is well made and very easy to install, they have been made for years and the instructions provided are excellent for either 110 or 220 volts.
Answer: no