Can I Mix Brand Units Together? - Ask The Expert Episode 297

Today's question comes from Steve H. "Hey Dan. Can I use a MRCOOL air handler with an LG Multi F Max inverter heat pump? I will have 5 LG air handlers. Plus, would also like to integrate this MRCOOL air handler." You can if you want, but there is a chance that mixing units will void any warranty you have. Plus if they cause issues, it will be much harder to solve the problem. So for best results, don't do it.  
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John
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The LG compressor will likely fail in short order (if my experience with LG compressors is any measure) anyway, so...
Fred from CT
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Hi Den , If I installed a upflow Mr Cool A coil on top of my old hot air furnace and say year's later wanted to replace the furnace, can I close valves and disconnect hoses on ac system without loosing the charge? Ok bye
Rebekah Muller
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You should have an HVAC professional do this for you so that you don't lose charge or release refrigerant.
Peggy
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Can you mix a traneXR heat pump Model # 4twr4036N100AA with a Ox box air handler gas furnace and a Ox box evaporator coil suppose to be paired together
Rebekah Quarles
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I apologize, but we sell neither system, so we wouldn't have the best expertise on this. While you technically can pair systems that are the same size together, it likely wouldn't be the best when it comes to efficiency. In order to maximize efficiency, it's best to pair units that are designed for each other in a system.
Brandon
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Was wondering if you can mismatch btu have a 18k compressor and a 12k power unit both mr cool and both brand new
Rebekah Quarles
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That is not recommended and will likely lead to performance issues.
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