Argue for your limitations and they are yours forever.
Chad Pilieri wrote:Thanks, just to clarify, you feel it is better to insulate the floor of the attic than to cover the ceiling. Does cellulose have any downside?
Chad Pilieri wrote:Great idea!
On a separate subject, what are your thoughts about heat pumps.
Chad Pilieri wrote:Great idea!
On a separate subject, what are your thoughts about heat pumps.
"Study books and observe nature; if they do not agree, throw away the books." ~ William A. Albrecht
out in the garden
Phil Stevens wrote:Travis, your calculations are off unless you're talking about either a really inefficient heat pump or one running at low ambient outdoor temps. A typical heat pump has a real-world COP of 3. A resistive electric heater has a COP of 1. So a bog-standard heat pump will give you three kWh (not 0.66) of heat energy for each kWh of electrical energy that it consumes, while the glowing bar can only ever put out 1:1.
However...the COP is not linear and will be poorer if you're trying to put out really hot air or water. This can be solved by running two smaller units in series with each one only responsible for half of the heat increase. Heat pumps also can suck if the outside air temperature is really low. To get around this we can use a ground source for the evaporator side, such as a well where the groundwater temperature stays roughly constant year round.
John Daley Bendigo, Australia The Enemy of progress is the hope of a perfect plan
Benefits of rainfall collection https://permies.com/t/88043/benefits-rainfall-collection
GOOD DEBT/ BAD DEBT https://permies.com/t/179218/mortgages-good-debt-bad-debt
So glamorous! Now do this tiny ad!
Learn Permaculture through a little hard work
https://wheaton-labs.com/bootcamp
|