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Originally Posted by DAVES
My two cents worth. Due to INFLATION two cents is now a buck and a half. Also true for air conditioning. Efficiency vs cost. The math is HUH. If you increase the SEER by say 30% you save like 5% on electricity. I would check with trusted expert. Multi speed fan and compressors will save electricity but parts can be hard to get and are much more expensive,
This is SUMMER. No one is offering DEALS on either the equipment or the installation.
On Line reviews. When I was in business one of the salesmen under several different names would post great reviews of the product and direct people to his account.
BIAS people promote the choice they have made. Oh and getting three estimates. Our central air pooped out. Estimates from others they charge you $100 for a service call.
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I am skeptical that a 2-speed or variable speed compressor will actually save electricity. I have never seen a real situation study that proves it. So, you run the compressor at 70 percent capacity and it runs longer than at 100 percent. The only way it can save electricity is if it is more efficient at 70 percent. And how does the electronic system know when to run it at 70 percent or 100 percent? When my house needs cooling, I want it to cool down as quickly as possible. It seems to me that, in order to save electricity, the system needs to know the exact time and temperature when it is appropriate to reduce the compressor speed. Some people say that they are quieter, but my single stage compressor is very quiet.