In my opinion, 45Db is a hideously loud fan.
I think most inverter fans are 60MM
This one maxes out under 20Db
http://www.noctua.at/main.php?show=productview&products_id=48&lng=enMy fridge came with a loud 120mm 72 CFM, 0.12amp sleeve bearing fan which pulled air through the condenser.
I replaced it with a Noctua NF-f12 fan @~55CFM fan and swapped it to push Air through the condenser.
I can no longer hear the fan 90% of the time, and fridge duty cycle decreased, and the Noctua draw less than half the current as the original. Triple win, and 25$ well spent in my book.