We have had air conditioning issues over the last numerous months at one of our rental properties. The tenant has actually complained about the cooling unit not working properly.
My cooling tech was unable to find any problems, yet the renter was still not happy. I decided to check it out myself. There had to be something causing the problem. The air flow appeared to be low, yet previous evaluations exposed there were no leakages in the ducts under your home.
I bought a “CEM DT-619 Thermo-Anemometer” on e-bay for $100 to inspect the amount of air flow coming out at each register. This device is really cool as it determines the amount of air flowing through the ducts, as well as the temperature. Some shows is needed to obtain precise measurements, however absolutely nothing complex. It is well worth the money.
It is easy to use:
Step 1: Measure the air flow into the system at the filter intake. This is the quantity of air going into the a/c device and measured in cubic feet per minute (CFM).
Action 2: Determine the air flow being delivered from each register, which is returning air to the interior of your home. Add all the output measurements from each register together. Now compare the consumption and output measurements.
Example: You measured 1,000 CFM entering into the a/c unit. In a perfect system, your output would measure 1,000 CFM. However, there are losses in the system and a measurement of +/- 10% or 900 CFM out is thought about excellent. Depending upon the system, these numbers will vary from producer to maker.
Translate the outcomes.
This is where my cooling issue began to get intriguing. The air flow into the system was 900 CFM, which was 150 CFM less than the 1050 CFM the device was rated. The air drain of the device was 700 CFM. Ideally, it ought to have been 900 CFM. We already understood there were no problems under the house. There was no air leaking from the self contained/packaged unit. Where was the air going?
Find and fix the issue.
The only area delegated try to find the leak was the place where the air goes from the device into the crawl space. A location that never has any problems according to all the a/c techs I understand. So, off came the metal cover that secures the ducts going from the unit to your home.
Lo and witness, the ducts were pulled loose from the unit. Not all the way off, simply loose with air gaps. It appeared the system was transferred to one side and the ducts did not stretch. We reattached everything and ran new circulation numbers. Now the device had 1020 CFM in and 940 CFM out. This corresponds to an 8% loss, which is thought about appropriate. This distinction was credited to restrictions in the ducts.
Our tenant still believed it was too hot in the house. So, next I generated a various cooling tech to examine everything again. What he discovered was that the coils were unclean. He cleaned them to minimize high pressure in the device throughout hot days so it worked more effectively. Also, the sequencer relay for the heat was broken. He replaced it and everything else looked good. Now the device had the exact same air circulation, but the temperature level dropped 12 degrees. You Should properly install your a/c for its long life and there are many best installing companies. You can also install an air conditioner with Snowman.