Air Handler Improperly Installed

Improper AC InstallationWe received a call from someone that hired another company for some work.  The result was an improperly installed air handler. As you can see from the photo, much of the air supply was blocked off, ensuring that it will never work properly.  We recommended removing the air handler and backing it up enough to allow for a small transition from the coil to the supply plenum. Additionally, we also had to redo all the plumbing to the unit and determine which one is cold supply and return and which ones are hot supply and return. This was a botched job from the beginning.  When the client attempted to contact the installing company, they were ignored.

Please remember when having work of this nature done to make sure that the company is highly regarded, insured and accountable! We run in to many similar situations where attempts to save money end up costing more by taking shortcuts or hiring non-qualified professionals.

How to Read Your AC Label

Have you ever wondered what all the numbers on your Air Conditioner unit meant?  If so, you’re not alone.  Having basic knowledge of your household items like appliances, air conditioning units, breaker boxes etc. is never a bad thing.  Say for instance you felt like your air conditioner is always running and never properly cools the intended area.  It could be just a service issue or it could possibly be that the unit is not big enough for that area.  How many tons is your AC unit?  We have created a guide below that may help you answer some of these questions.

How to read an air conditioning label

    1. Model Number – This is the model number of the AC unit designated by the manufacturer.  This is used for warranty issues, replacement parts and other issues.
    2. A.C Volts – The 208 – 230 you see is a range meaning the manufacturer is saying you can run it on either or anything in between.  Many people are used to seeing 220 which would be ok.
      1. Phase: 1 – Represents single phase electricity. This is typical in standard residential scenarios.
      2. Hertz: 60 – This represents the electricity cycles per second based on alternating current.
    3. Voltage Range – This is the operating voltage that the unit works within.
    4. Max. Fuse Amps – This is to correspond against the breaker box to avoid over-fusing.
    5. Min. Circuit Amps – Or MCA.  It is used to insure that the wiring will not overheat during normal/expected operating conditions.
    6. Fan Motor – Fan on the outside unit that blows air across the condenser coils. FLA = Full Load Amperage which is the amount the motor can draw/operate without damage. The H.P represents a 1/6 horsepower motor.
    7. Compressor – Takes refrigerant (pumps) throughout the system
    8. Factory Charge – Recommended manufacture refrigerant charge
    9. Factory Test PressurePSIG: The gauge pressure in pounds per square inch, where 0 PSIG corresponds to atmospheric pressure (14.7 PSIA). A positive PSIG value indicates the pressure in pounds per square inch above the ambient pressure.
    10. Serial # – Serial # of the specific unit
    11. Phase and Hertz – See bullet point 2

Other Notable Items

Please note that labels can vary by manufacturer but the above listed items are fairly common.  A few other items yo note might be;

  • Unit Size – 1 ton = 12,000 BTU’s.  If you look at the example above, the model number usually has a tonnage indicator.  The 24 in the model number/12(BTU’s) indicates that this is a 2 ton unit.
  • SEER vs. EER – They are both measurements of energy efficiency.  EER stands for “Energy Efficiency Ratio”. It was designed to calculate the energy efficieny of an AC unit.  It is calculated by dividing the electrical input by BTU’s under a single set of conditions (temperature and humidity).  SEER is the same only it measures efficiency on a “Seasonal” basis with varying conditions.


We hope you find this reference post helpful and that you walk away knowing a little bit more before you read it.