We have actually had a/c issues over the last a number of months at one of our rental residential or commercial properties. The lessee has complained regarding the a/c system not working properly.
My a/c technology was not able to discover any type of troubles, yet the renter was still not satisfied. I made a decision to check it out myself. There had to be something causing the problem. The air flow appeared to be reduced, yet previous evaluations revealed there were no leaks in the ducts under your home.
I acquired a “CEM DT-619 Thermo-Anemometer” on e-bay for $100 to check the quantity of air flow appearing at each register. This device is really cool as it determines the amount of air moving with the air ducts, as well as the temperature. Some programs is needed to obtain exact dimensions, yet absolutely nothing challenging. It is well worth the money.
It is easy to use:
Action 1: Measure the air circulation right into the system at the filter consumption. This is the amount of air going into the cooling device as well as measured in cubic feet per min (CFM).
Step 2: Measure the air flow being supplied from each register, which is returning air to the inside of your home. Include all the result measurements from each register together. Currently contrast the consumption and result measurements.
Instance: You measured 1,000 CFM entering into the air conditioning device. In an ideal system, your outcome would gauge 1,000 CFM. However, there are losses in the system and also a measurement of +/- 10% or 900 CFM out is considered great. Relying on the system, these numbers will certainly vary from producer to maker.
Interpret the outcomes.
This is where my air conditioning issue began to obtain intriguing. The air flow into the system was 900 CFM, which was 150 CFM less than the 1050 CFM the unit was ranked. The air flow out of the device was 700 CFM. Ideally, it ought to have been 900 CFM. We currently understood there were not a problem under the house. There was no air dripping from the self contained/packaged device. Where was the air going?
Discover and also fix the problem.
The only area delegated search for the leak was the place where the air goes from the system right into the crawl space. A location that never has any kind of issues according to all the a/c technologies I know. So, off came the metal cover that protects the air ducts going from the device to the house.
Lo and lay eyes on, the ducts were drawn loose from the unit. Not all the way off, just loose with air spaces. It showed up the unit was relocated to one side and the air ducts did not stretch. We reattached whatever and ran new circulation numbers. Currently the unit had 1020 CFM in as well as 940 CFM out. This relates to an 8% loss, which is taken into consideration acceptable. This distinction was credited to restrictions in the air ducts.
Our occupant still assumed it was as well warm in the house. So, next I generated a various cooling tech to check everything again. What he found was that the coils were filthy. He cleansed them to lower high pressure in the unit during hot days so it functioned a lot more efficiently. Additionally, the sequencer relay for the warmth was damaged. He replaced it and also whatever else looked great. Now the device had the very same air flow, yet the temperature level dropped 12 degrees.
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