Posted by welled deers on December 07, 2012 at 18:51:12 from (69.168.250.166):
In Reply to: O/T, Heat pumps posted by murray2 on December 07, 2012 at 17:24:22:
We have a ground source heat pump that has worked well for the past 12 years in north central Minnesota and I would never go back to traditional heat and air conditioning. Pay back on the additional cost was about 4 years. We do have both a propane and electric in-plenum back-up systems, but I have had them turned off for years unless we are planning to be gone for several weeks. Our local power company does have a special rate in exchange for turning off power during their peak electrical demand times. The house may drop 2-3 degrees when heat pump power is shut down and we choose to live with that rather than use back up heat. Our house is new construction and very well insulated. Our annual electrical energy cost (Jan 1 to Dec 31) for heating and AC is about $500 and has been as low as $430. Install costs are much higher now and payback times are longer. Be sure to have a good heat loss calculation done on the house and have any installer give you a detailed analysis of all costs including projected operating costs. Many power companies will also do a energy calculation based on the heat loss of your house. Good luck
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Today's Featured Article - Hydraulics - Cylinder Anatomy - by Curtis von Fange. Let’s make one more addition to our series on hydraulics. I’ve noticed a few questions in the comment section that could pertain to hydraulic cylinders so I thought we could take a short look at this real workhorse of the circuit. Cylinders are the reason for the hydraulic circuit. They take the fluid power delivered from the pump and magically change it into mechanical power. There are many types of cylinders that one might run across on a farm scenario. Each one could take a chapter in
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