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Did you know that about 50% of all the money we spend on heating and cooling is due to inefficiencies in the way these systems are installed?
It's a sad but true fact. A whopping 25% of your hard earned money is literally leaking out of the duct work. The other 25% comes from other installation problems with the units themselves.
The biggest problem according to John Proctor of Proctor Engineering Group is that the vast majority of heating and cooling systems are improperly installed to being with. A poor installation leads to wasted energy, future reliability problems with the units themselves, and of course a whole lot of wasted money.
The good news is that there are several things that any homeowner can do to begin the auditing process of their HVAC system. Just keep in mind that for some of these steps, you are better off printing out the article and discussing it with a licensed heating and air conditioning contractor. You can find a HVAC contractor using the form below, or using trusted sources like the Better Business Bureau.
Have a licensed professional check your HVAC system for energy efficiency by verifying the original installation. John Proctor has found that items like the compressor, coil, and capacitor will last much longer when compared to exactly the same HVAC systems that were installed by a lazy or incompetent HVAC contractors.
Did you know that about 50% of the money you spend on cooling your home is being wasted because of a improper installation?
Standard Installation - Not Good Enough
Proper A/C Installation
Having leaky duct work system with a seer 14 AC unit will easily drop it down to a seer 10 efficiency. Then if you add the wrong amount of refrigerant in, the efficiency will drop to a seer 8. And lastly if you get the wrong amount of airflow, you're going to drop it down to a seer 7.
The amount of air flow across the inside coil.
4 ton air handler on a tiny duct system equals not enough air flow.
You really need to test it.
Test Method 1: Temperature Split Method
Title 24 Airflow Test in California has a temperature split method which is a common method that is easy to do. What you do is measure the wet bulb and dry bulb temperatures which tells you what the humidity is as well as the temperature on the return side. And also what the temperature is on the supply side. So you see how much the temperatures drop between the return and the supply. Based on the temperature drop you can tell whether or not you got too little air flow or not.
You can compare your results with a table you get from the CDC website www.energyu.ca.gov. It's good for all the states, east coast, Saudi Arabia. If your temperature split is too high, you got too little airflow.
Test Method 2: Using a Flow Grid
This is the best way to measure the airflow. Its a device that you put in where the filter would normally be and you take a few pressure readings, and from that you can get real accurate measurements of how much airflow is flowing through the inside coil.
How do you know if you have the proper amount of airflow. Manufacturers give different specs for different regions to get air flow numbers. 450 cfm per ton across the coil in California. Georgia where it's hot and humid needs 350 cfm across the coil per ton.
What About The Size Of The Line Set Itself
As the line set gets longer you have to change the diameter of the line set. It's something that the manufacturers specify but it's most often ignored. Most often mistakes found coming from the back of the unit they will actually use a smaller line set which the machine was designed for. People actually take clamps and squeeze down the unit not put a fitting in there and braze the gap. The efficiency drops significantly using that method because there's a good pressure drop there andnothing is working right at that point.
Top Efficiency Hits
The Durability of a system depends on doing it right. If you don't do it right the first time, it's going to keep coming back and bite you.
This helps out the builder, state, and HVAC contractor. Good trade schools and manufacturers have training.