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: How many heaters will one thermostat control, 4 - 5 or more?
Document: This thermostat works great, holds heat within ! or 1.5 degrees. Works with baseboard or fan forced wall heaters. Good instruction sheet. Only negitive is when you try to calibrate it the plastic you have to twist is way too tight. I gave up afraid I would break it. I have two of these and will buy more as I upgrade my heaters.
The thermostat quit working on one of our upstairs electric baseboard heaters and I discovered that you can't just buy a regular low voltage wall replacement furnace thermostat. 220 volts goes through this thing so you have to be careful to turn off the circuit breaker to it and replace it with a good quality thermostat that is meant for this type of heater. This one is good quality and a bargain price here. It works great and has a built in thermometer that shows you the current room temperature.
I have tried verious brands of thermostats over the years and this one seems to keep a more even control of the tempature.
I bought three in 2010. By 2013, the thermostat didn't work on two on them. One stays on all the time no matter what the setting and the other needs to be set 20+ degrees higher than the room temp for the heater to engage.
I had this 220 V line level thermostat installed in my basement. One day we smelled burning plastic and traced it to the thermostat. I shut off the power and removed the thermostat. One of the inside contacts (red wire,lower contact) was badly charred,  the gray housing was also melted and charred and the wire insulation was melted. Fortunately, we smelled the overheated plastic and turned off the power immediately. I believe the problem is in the design or the manufacturing.
It is adjustable and controls very well. Not like the junky ones that cost more at Lowes these control to a couple of degrees.
Easy to install and works great. Best I've found for 220V Baseboard heaters.Tried others - no Thermometer, no idea what temp.
But it is nice to have since the original one didn't have one.
These appear well made, I figure you can trust Honeywell. The unit sticks out from the wall a lot more than I expected, so it is not 'unnoticeable'. The temp reading/setting seem to be far from perfect. I bought them for small baseboard heaters that are undersized for the rooms, so I don't expect alot of cycling. If you want good temperature setting accuracy, get a digital unit for about 20-30 dollars more. These don't require batteries and should probably last forever.
The thermostat seems to work fine but I bought 8 of these and none of the temperature gauges are even nearly accurate.
Answer: yes