We have been using the fireplace almost exclusively for our heat, and now we want to experiment with the mini splits and see how they work to heat our home. We have been working with them the past couple of days - as it's been about 4 days since we had a fire in the fireplace. We finally got out the manual we got with them to look it over real good for the heat mode. One thing we were reminded of was that there are filters in them that are supposed to be cleaned every two weeks, and another filter that should be cleaned once every 3 months. I had forgotten all about those! I don't remember when I found out about them - I'm thinking Troy had to tell me about them, but I had completely forgotten. You know what that means - those filters were filthy! YUCK! Well, they are clean now.
We have been really spoiled by the fireplace heat - as it gets VERY warm, especially on the main level - and, of course, we aren't going to set our mini splits at 75 degrees! So, we have them set at 70 degrees. We are told to set them at one temperature and leave them there. They will supposedly not use so much power that way. When we had a furnace, we would vary the temperature according the activity level in the house. When we were sleeping, we would turn it down to 66. During the day, we would turn it up to 72, and we still had cool spots in the house.
The mini splits are set in a central location on each of the two upper levels in the house. So far, they seem to be holding a constant temperature. Earlier in the fall, I had set the main level one at 69, but for some reason it kept heating until it was at 73! I turned it off then. I don't know what I did to make it keep heating, but that hasn't been a problem this week. They are heating to the set temperature, and no hotter.
The other thing that is affecting the temperature in the house is the new puppy. How, you may ask?! Well, puppies go outside a LOT to go potty and such! This means that the front door gets opened up frequently, and it is bitter cold this week - ranging from negative digits to about 14 degrees! The frequent opening of the door allows that bitter cold air into the house. Upstairs the temperature is staying more constant, as it isn't as affected by the frequent opening of the front door.
Another thing that affects the temperature inside is whether or not the sun is out. We are experiencing the cloudy days of winter right now, and most of the days in the last month have been cloudy for at least a good portion of the day. And, the sunny part of the day is soooooooo short! I'm very grateful to be on the other side of the winter solstice! When the sun IS out, it really helps to warm up the house. It doesn't raise the air temperature by 10 degrees, but it does offer some warmth right in the sunlight, and it just LOOKS warmer in here! It's so much easier to get moving when the sun is shining, don't you agree?!
Our electric usage while using the mini splits exclusively has ranged from 164 to 212 KWH per day. This is about 4-5 times the KWH we used per day in the summer. Back then I thought a day of 60 KWH was so high! This power bill is going to be painful. Even with the fireplace going, we have not used less than 90 KWH in a long time. Our power bills in the summer were a bit lower than we had experienced in our previous home, but this winter, they have been quite a bit higher. This home is over twice as big as the other home, and so there is a lot more space to heat and cool (can't hardly think about COOL right now!).
We will keep experimenting with the systems in the house, and report our results to you! Meanwhile - stay warm and enjoy this season of the year - these cold months make spring that much better!