Research name brands first. Know home square footage in order to get most energy efficient. Home and Garden will not get the most information needed.
Find the name of the manufacturer, model, and serial number of your unit. I recommend contacting a local HVAC company with this information. They will be able to contact the manufacturer to find out the efficiency. You can even call the manufacturer directly and they may be able to get you the information you seek.
HVAC unit is basically combination of HVAC chiller and all related equipment. See below related link for all details
ouside HVAC unit
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Model # for Lennox HVAC unit
You can go to a dealers web site for information on unit types and local dealers. You can also go to local.com to find local dealers in your area. Energy star.gov offers good information on hvac systems and energy ratings.
where is reset button on outside unit of American standard hvac where is reset button on outside unit of American standard hvac
Plug your unit into it and play it loud
Induction Unit
To condense
Because the drain is clogged.