I've replaced a blower motor in my home AC with a similar motor. It's the same 1075 rpm, but 1/2 hp instead of 3/4 hp (as the old one had). How will it affect my AC performance? Does this power rating matter? It seems that if it's the same squirrel cage and the same RPM,the air flow should be the same.Thank you.
Yes, it does matter. The horse power rating has to do with the motors ability to turn and maintain a constant RPM under a given load. The manufacturer seems to think that a 3/4 horse power is needed to turn THAT fan. You can use it, but the turning RPM may be less than you need and the life of the motor will be greatly reduced. If it were me, I would use it, but order a 3/4 HP motor ASAP and replace it.
