Looks like your shop dealer wants to sell you a chiller but how hot is it in your room? Put four fans if you don't want to pay for electricity cost and a $900 chiller.
29-30 F is too hot though.
If you keep the room air conditioned to 75-80 degrees then you should have a problem. Make the canopy an open back canopy.
Should look into the aqualogic or aquanetic chillers. Going to run you about $1000.
LINK
If you have more heating problems, post your question at www.reefcentral.com
There are some chiller experts there.