So I realize this is pretty far off topic for this forum, but I know there are a lot of smart energy minded people here. If anyone has any suggests for other forums where this type of question would be more appropriate I’d be happy to hear them.
But anyway, I’ve been looking at the energy consumption of my heat pump and during the summer it’s running for as long as 15 hours a day. When it’s running it consumes about 2.2kWh, so that’s as much as 33kWh a day. Since my entire house only (not counting car charging) only consumes around 70kWh a day in the summer it looks like cooling is close to half of the energy consumption of my house and I’d like to try to reduce that if I can.
So far I’ve got three ideas, but I’m not sure which is really going to be the best use of my money and have the most impact.
I could replace my heat pump with a more efficient unit. The unit I have now is just a basic single speed/single stage heat pump, but it’s only about 6 years old and it is 14 SEER, so it’s not hugely inefficient. If I replaced it I’d want to go with a high end unit with a variable speed heat pump. I haven’t gotten any quotes, but from what I’ve seen online I’m probably looking at somewhere on the order of $10K for this. But I really have no idea just how much more efficient, say a 19 or 20 SEER variable speed heat pump would be. Would that save me 15kWh a day? Or 5kWh a day?
Alternately, I could replace my windows. This house has single pane aluminum frame windows. I can feel the heat coming in when the sun is shining through the windows on a bright sunny day. I did get a quote from a glass place to leave the frames and just replace the glass with double pane low E glass on all the windows for a bit less than $4000. That seems like a great price, but again, I’m having a hard time trying to figure out exactly how much that might save.
Finally I could add some insulation to my attic. This house was built in 2001 and I’m sure the insulation hasn’t been touched since then, so there could be some benefit to upgrading it. My utility company has a rebate for attic insulation and they suggest that the average cost after the rebate is about $300. That seems fairly reasonable, but again, it’s hard to quantify that into potential savings.
So, all that said, any ideas on what it might be best to focus my time and money on in terms of improving energy efficiency? Anything else that I didn’t mention that I should consider doing?
But anyway, I’ve been looking at the energy consumption of my heat pump and during the summer it’s running for as long as 15 hours a day. When it’s running it consumes about 2.2kWh, so that’s as much as 33kWh a day. Since my entire house only (not counting car charging) only consumes around 70kWh a day in the summer it looks like cooling is close to half of the energy consumption of my house and I’d like to try to reduce that if I can.
So far I’ve got three ideas, but I’m not sure which is really going to be the best use of my money and have the most impact.
I could replace my heat pump with a more efficient unit. The unit I have now is just a basic single speed/single stage heat pump, but it’s only about 6 years old and it is 14 SEER, so it’s not hugely inefficient. If I replaced it I’d want to go with a high end unit with a variable speed heat pump. I haven’t gotten any quotes, but from what I’ve seen online I’m probably looking at somewhere on the order of $10K for this. But I really have no idea just how much more efficient, say a 19 or 20 SEER variable speed heat pump would be. Would that save me 15kWh a day? Or 5kWh a day?
Alternately, I could replace my windows. This house has single pane aluminum frame windows. I can feel the heat coming in when the sun is shining through the windows on a bright sunny day. I did get a quote from a glass place to leave the frames and just replace the glass with double pane low E glass on all the windows for a bit less than $4000. That seems like a great price, but again, I’m having a hard time trying to figure out exactly how much that might save.
Finally I could add some insulation to my attic. This house was built in 2001 and I’m sure the insulation hasn’t been touched since then, so there could be some benefit to upgrading it. My utility company has a rebate for attic insulation and they suggest that the average cost after the rebate is about $300. That seems fairly reasonable, but again, it’s hard to quantify that into potential savings.
So, all that said, any ideas on what it might be best to focus my time and money on in terms of improving energy efficiency? Anything else that I didn’t mention that I should consider doing?