Fett
01-07-2013, 12:51 AM
Hello Gents,
I have a small storefront that is having cooling issues. The units run all day long and never shut off. The only way to keep the space cool is to run the units all night long to get the space cooled down with hopes that they maintain it during the day.
It is 5,500 Sq. Ft. with 12 Ft. Ceiling (T-Bar Tiled).
It has two 6 ton Carrier WeatherMakers (R-22 HeatPumps) that are 6 years old.
The walls are R-6 insulation and the ceiling is R-6 also.
It has a south facing window (with double doors) dual pane lightly tinted of 180 Sq. Ft.
Our current outdoor ambient is 116F (46-47C).
I have already replaced the OFM's on both units and a compressor and IFM on one of them. The owner no longer wants to repair the units but wants to upgrade to something more capable for the space.
As far as math goes the two units are only capable of moving 144,000 BTUs/Hour.
I figure that this space is @ or around 66,000 cubic feet of airspace. Does 6 BTU's per cubic foot of airspace sound about right? That would put me at 396,000 BTUs/Hour.
People always calculate for just square footage and that just doesn't seem right to me. Any help would be appreciated.
I have a small storefront that is having cooling issues. The units run all day long and never shut off. The only way to keep the space cool is to run the units all night long to get the space cooled down with hopes that they maintain it during the day.
It is 5,500 Sq. Ft. with 12 Ft. Ceiling (T-Bar Tiled).
It has two 6 ton Carrier WeatherMakers (R-22 HeatPumps) that are 6 years old.
The walls are R-6 insulation and the ceiling is R-6 also.
It has a south facing window (with double doors) dual pane lightly tinted of 180 Sq. Ft.
Our current outdoor ambient is 116F (46-47C).
I have already replaced the OFM's on both units and a compressor and IFM on one of them. The owner no longer wants to repair the units but wants to upgrade to something more capable for the space.
As far as math goes the two units are only capable of moving 144,000 BTUs/Hour.
I figure that this space is @ or around 66,000 cubic feet of airspace. Does 6 BTU's per cubic foot of airspace sound about right? That would put me at 396,000 BTUs/Hour.
People always calculate for just square footage and that just doesn't seem right to me. Any help would be appreciated.