Question for Someone Smarter Than Me!

[mprob]

I'm working on a strip mall suite around 1200 sq. ft in size. It's sandwiched in between a dry cleaner and a pizza shop. This one story suite has little if any insulation above the drop ceiling and a HOT and HUMID basement (due to the cleaners machines I'm assuming),with no insulation in the floor. They have a 2 ton 410A condenser, a 2.5 ton coil, sitting on top of a York TG(8,L)S060A12MP11 furnace. The heating load is o.k. but the cooling is undersized. The owner does not want to insulate the structure. So with 0 insulation the load is 44,000 btu's of cooling. How can I get 1600 cfm out of that furnace, so I can install a 4 ton coil/condensor. Will installing a 1/2 or 3/4 hp rescue motor with the existing 8x10 blower wheel do it? Thanks in advance for any info.

[hotrodrob]

Can we ask why the owner is not considering insulating the building. This alone can pay for itself in fuel costs and electricity saved.

[Gib's Son]

Not sure where you located but my guess is that the tenant will not be happy. At 600 sqft/ ton, that seems awfully high for retail space. I usually see the owner providing for units at 350-400 sqft/ ton. If the tenant needs more it's up to them to provide it. And, what hotrod said.

[bobboan]

[QUOTE=. Will installing a 1/2 or 3/4 hp rescue motor with the existing 8x10 blower wheel do it? Thanks in advance for any info.[/QUOTE]


No, that won't help. The existing motor will turn at its rated rpm on high speed. Putting in a larger horsepower motor that's rated at the same rpm, will only give you the same rpm and the same cfm. You would have to have a larger blower.

I agree that you need more cooling for 1200 sq. ft. Could you install a mini split?