Soil color does not affect the behavior and use of soil; however, it can indicate the composition of the soil and give clues to the conditions that the soil is subjected to.ark brown or black color in soil indicates that the soil has a high organic matter content. Wet soil will appear darker than dry soil. However, the presence of water also affects soil color by affecting the oxidation rate. Soil that has a high water content will have less air in the soil, specifically less oxygen.
Re: On coil / off coil temperature. Originally Posted by The Viking First you would have to determine what type of kit you are looking at. In your example above, for the indoor coil, the on coil temp would be 24 degrees for a recirculating unit and 45 degrees for a 100% fresh air unit...e: On coil / off coil temperature. Originally Posted by The Viking First you would have to determine what type of kit you are looking at. In your example above, for the indoor coil, the on coil temp would be 24 degrees for a recirculating unit and 45 degrees for a 100% fresh air unit...
Cooling example: Itâs a scorcher, itâs 100F outside and a day when the air conditioner is needed the most. Itâs 150F in the attic with 200 feet of poorly insulated supply ducting. The temperature drop over the coil is 20F. The supply plenum temperature measures 60F with the average supply register testing out at 70F.Thus we see a duct temperature loss of 10F. Divide the 10F loss into the 20F temperature drop over the coil: the system is losing 50% of its capacity. That just turned the systemâs efficiency from 14 SEER to 7 SEER.he supply plenum temperature measures 60F with the average supply register testing out at 70F. Thus we see a duct temperature loss of 10F. Divide the 10F loss into the 20F temperature drop over the coil: the system is losing 50% of its capacity.