We usually run the house low temp at night, and the old system took about 10 minutes to cool to that temp, and didn’t run much during the night.

Any ideas? I think the old blower was a single stage and the new is an ECM ( I checked). Could this be why? Does “more efficient” mean crappier cooling?

Question from user CardMonarch at hvacadvice at reddit.com.

Answer:

If you have the means to monitor the energy used, you will see a difference. You are already experiencing that difference. Your old system blew hard and fast. The new one has incremental steps to provide the (most efficient) heating or cooling.

Answer from user Rare-Woodpecker8993 at hvacadvice at reddit.com.

got a new hvac unit at our house we rent today and there is a problem