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About Fred Weldin
Expertise
I can't help you if your whatsis won't work, people (Especially if it's a refrigerator); I have no experience with appliances, and I haven't been involved with H&AC service and repair since March 08, 1996 (Thank the Lord); I reject appliance questions and H&AC "Service and Repair" questions (about 18 a week), so if you want to know why your whatsis isn't working like it used to, ask someone else. I delete answers that are unread after one week (about three a month).
If you have questions about how big a unit you need, if one room's warmer than the others, if you want an opinion on bids received, etc. just ask. Do visit askweldin.com, there's a lot of good information on sizing, ductwork, efficiency, as well as some techniques accomplished DIY-ers can use to troubleshoot and improve their H&AC.
Finally, I want to thank all of the kind, serious people whom I meet here; I enjoy working with you.
Experience
50+ years in the business. See askweldin.com
Education/Credentials
B of ME U of D 1965, numerous classes and seminars since.
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You are here: Experts > Home/Garden > Home Appliances > Heating, Air Conditioning, Fridge, HVAC > Carrier Heat pump Effiency
Expert: Fred Weldin - 11/1/2009
Question
I recently purchased a Carrier 19 SEER heat pump and my house is more comfortable when the unit is set at at 72 verses 70 degrees. How does the cost to run this unit vary as a function of the indoor heat setting? Since this is a two stage system is the cost increase per degree increase in the thermostat setting negligible? How does the potential increase vary as a function of the outdoor temperature? How would any increase compare to what it would have been with my old 12 SEER system?
Answer
Gary:
Directly as the temperature difference between indoors and outdoors.
No.
See first answer.
7/19 +/-.
Fred
PS: We've seen problems with variable speed not being set up correctly; do verify it is wired as a two speed/variable speed, and that proper CFM is set; it'd be a shame to spend all that money and later learn it's operating as a single speed, fixed airflow with too little/too much airflow.
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