I have an 8 person arctic spa and I live in alberta. I use my hot tub 3 to 4 times a week for about 45 minutes to an hour each time. I keep it at 102 degrees. I was told it would raise my electric bill by about 30 a month during winter, but I have seen it raise my electric bill by closer to 80 per month. I am trying to figure out if this is normal. Thank you for any help.