I'm still trying to get my brain to accept that heat pumps can put out 2 to 3 times as much heat as the kilowatt hours they use. I keep trying to find a description of what the limitations are and why that performance number is what it is and not something different.
This page is the best I could find, but it still doesn't explain what the limiting factors are:
Speaking of heat pumps... Yesterday I had to dig out, throw away, and replace a wheelbarrow full of topsoil from one of the Pachysandra beds alongside our AC pad. The "ignoranus" who carted off the old units must have let the refrigeration oil spill out right there. Shortly after they did the job a patch about three square feet in size started turning yellow and dying, and it just kept getting worse.
From my experience with fuel oil delivery stuff (With it's attendant spills around houses.) I knew that I wouldn't live long enought to see that soil come back to where it could support vegetation by itself again, so replacement was the right solution.
Arrrrgh!!!
CU Sunday, but que hora?
Love,
Dad