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Does the mounting pad have to be replaced to install at new heat pump or air conditioner condenser (outside unit)?

Sunday, August 11, 2019

While it might be possible for your HVAC contractor to reuse the existing pad for a new condenser, there are several factors that will likely make it necessary to replace it:

  1. The old pad is fractured, damaged.
  2. The old pad is too small. New condensers often have a larger footprint to accomodate the additional surface area of condenser coils necessary to get the federally mandated higher efficiency rating (SEER).
  3. The old pad may not meet the current Florida Mechanical Code standards for wind resistance and elevation above ground. Here’s the applicable code citations:

        The level of wind resistance necessary is based on this Florida Wind Zone map. So the further south you are in the state, the more hurricane reistance is required:

        New pads are manufactured from concrete or plastic specifically to meet the wind resistance requirements for both the pad itself and the mounting of the condenser to the pad, which may even require ground anchors below the pad. So, essentially, it’s not simple anymore, and very likely that a new condenser will need a new pad. 

   Also, see our blog post Why does an air conditioner condenser unit need to be level?

• • • • • • • • • • • • • • • • • • • • • • • • • • • • • 

  To learn more about heating and air conditioning systems, see these other blog posts:

• How can I find out the SEER of my air conditioner? 

• My air conditioner won't turn on. What's wrong? 

• How can I find out the size of my air conditioner? 

• How can I find out the age of my air conditioner or furnace?

• How can I tell whether the condenser (outdoor unit) is an air conditioner or heat pump? 

• Where is the air filter for my central air conditioner and furnace? I can’t find it? 

• Does an old air conditioner use more electricity as it ages? 

• How did homes stay cool in Florida before air conditioning? 

• What is wrong with an air conditioner when the air flow out of the vents is low?

• Why has the thermostat screen gone blank? 

• Why does it take so long to cool a house when an air conditioner has been off for a while? 

• Why is my air conditioner not cooling enough? 

• What are the most common problems with wall/window air conditioners?  

• Will closing doors reduce my heating and cooling costs? 

   Visit our HEATING AND AIR CONDITIONING page for other related blog posts on this subject, or go to the INDEX for a complete listing of all our articles.

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