Instruction: Output yes if the supporting document can answer the given question. Otherwise, output no.

Input:
Question: are these heaters 220
Document: The only downfall to these heaters is you must have 220 volt to operate them. Make sure that your electrical service can handle the voltage and there is enough space on your electrical panel for a 220 breaker.
Works well, worth the money so far. Happy with the purchase. Installation was not bad, 220 volt makes for quick heating.
purchased this item for my garage, It holds one car and two motorcycles. This unit is perfect and maintains a perfect 72 degrees in the winter. I highly reccomend it. Easy to install requires a 220 line.
5000 watts over 220 volts is about 23 amps. It has two hot wires and a ground. Therefore, I ran 10/2 wire to a dedicated 30 amp double-pole (220 volt) breaker in a hardwired style configuration. The instructions that came with it provided absolutely no electrical installation guidance.
I installed this heater in my garage to be more comfortable when I work out there in the winter. It only takes a few minutes to take the chill out of my three-car garage. In fact, I often have to turn it off while I'm out there because I get too warm.Be aware, this little heater draws 50 amps at 220 volts. You will need to install a separate circuit breaker.
This is a heck of a heater! My shop is one large bay and this heater heats it very well! The hardest part was having it wired for the 220v. I put it on a 20amp breaker and never kicks it off. Mounted very easily and its got a quality weight to it. The front vents are adjustable so you can somewhat adjust the airflow direction. Definitely a good decision to buy. Just remember, it's not a plug and play, you have to run 220 to it.
As to comparisons with other heaters at "the jobsite," what distinguishes the Dayton, is the fan. It's strong enough to push the heated air out over far more area than the little heaters that are designed to work with most electrical systems - 15 amp outlets...
For it's size, it sure puts out a lot of heat and at a good breeze. The electrician commented on how well it was designed and more efficient (copper heating coil) than other garage heaters he had installed for other customers. Even suggested he would look into getting the same unit, especially for the price and efficiency.
The walls and ceiling are well insulated the two overhead doors are not. I really need two heaters to decrease the warm up time. The area under the ceiling mounted heater is comfortable in minutes. If I decide to add a second heater this is one I'd definitely consider again.
I haven't seen the electric bill yet so I'm giving this heater 5 stars. I had previously bought one of the propane Reddy Heaters (RLP50VA see my review on that) to heat my garage but that heater was completely unsuitable for that task. This one is perfect, it heats up the garage quickly and is quiet and clean.
Answer: yes