Instruction: Answer the given question by extracting information from the supporting document.

Input:
Question: How efficient is this unit? Did your electric bill change after you began using it?
Document: I've been satisfied with this unit, it's easy to vent through the window. The portability is a plus, the unit can be moved to where it is needed. Very effective and efficient. It cools quickly and the set up is straight forward. Basically just plug in and turn-on. This product was exactly what I was looking for. It is humid here, and I needed a unit with a strong de-humidifier.
I live in a dryer area so don't know yet how long it can go without draining.OTHER INFO--The hose that connects the unit to the window expands to around 5 ft long (the unit works more efficiently if you keep this as short as possible) and the electric cord is around 6 1/2 ft long.--There is a non-heater version (12000e) of this unit but with free shipping this one was the same price.
I haven't seen a monthly statement to see how efficient the portable AC has performed. It runs quieter than I expected.
This works great.It seems to be smaller and more portable than my other portable heat pumps.The only thing to be cautious about when using this model is that you need to be patient with it. When you put it in heat or cooling mode it takes a few minutes to warm up before it starts really pumping out the hot or cold air. Otherwise it seems to heat and cool my room quickly.
I bought this unit new and waited until this summer to open it. The unit did not work right out of the box. NewAir charged me $50 for s/h to return it, and they sent a replacement promptly. That one worked for only a month--and this was an extremely cool summer here. It comes on but does not cool the room.
Packaging was good for this unit. I uncrated it and let it sit upright for a couple days before starting it up (as it arrived up-side down) so that any oil could drain back into the compressor. The adapter for the window was better than most. Functions are easy to understand and use. The unit is quiet as far as these portable units go. I would recommend it.
It is a powerful unit and, as far as stand alone air conditioners go, relatively quiet. I purchased  a different brand from a local hardware store and it sounded like a jet engine was taking off in the room. This unit, while forcing the television volume up a little, was about as loud as any window unit.Well worth the money.
We purchased after are other AC unit quit working and we use it in our attached storage shed and also were our two dogs stay in out of the weather. It keeps this area cool and dry in the summer for them and warm in the winter. It is a small area, but we want it to be nice for our pets, and my husband has tools and other items that he doesn't want to get damp and rusted. Bottom line this is a great buy and has worked very well.
This is great product that cools a medium size room well. We had one in our bedroom and then bought another for the office. My bedroom is now a comfortable place to both sleep in and read, relax, etc. The unit is not too noisy. I can still see out my window unlike a window unit. I like how I haven't had to empty out any water buckets. Would definitely recommend this air conditioner to others.
works great heating this last winter and cooling this 105* degree summer (whew).I.ve had no problems you do have to exhaust the air hose out the window, but it hasa kit for that included. you have to drain the water some where it does have a float if the tank fillsbut rolling it somewhere to drain would be such a pain, so i ran a drain line outside.im getting one for my mom now for a backup incase her unit fails.
Answer: Good question...I hooked up my Watts UP and the unit when cooling uses right at a kilowatt (mnfg says 1.16 KW.)   So in North Dakota that's probably under 10 cents an hour, but if you are top tier PG&E; Customer in the Peoples Republic of California its more like 40+ cents an hour.  The way I use it is to temporarily cool a home office for no more a few hours a day (afternoon) in summer, so I'd guess it is about $50.-75./yr for electricity for that (rates are between the extreme rates above(California Central Valley where we have nice cool evenings and dry hot days)).  I don't usually use it for heating.   It has a pretty powerful fan that is easy to direct where you want it so if it is too warm and you don't mind the fan air that makes it feel like its cooling quite a bit more than it is so you don't run the cooling as much...when the thermostat turns cooling off the fan uses 0.075 KW...less than a tenth of the cooling usage.  I'd expect this is similar to what a Window air conditioner would cost to run with similar cooling effect but less flexibility in where to send the air. So in my application the electrical cost isn't a big deal compared to the purchase price + CA Sales Tax.