Central Air HVAC vs Mini Split systems?

Question

Hello BPers.

I have an old central air system that needs replacing.  Its 18 years old and wasnt used much but the compressor isnt working anymore. Looking into the mini split systems it seem like this would be more energy efficient since you're only servicing rooms/zones not the whole house.  Are they all the hype? Ive seen them more in Asia, but not much here in the states.

Eric Teran · Answer

@Christopher B. I am not sure if it needs anything different or extra. It did get to zero this winter in DC and the minisplits heated up the house to 70 just fine. Maybe you might have to buy a better brand if it is going be working harder in the winter to be on the safe side. I do know some minisplits systems will either only cool or heat. However, if you pay a little more like I did each room can do what it wants. So one room can heat and another can cool at the same time even if they are on the same condenser unit.

David Floyd · Answer

I have used a few mini splits in small one bedroom apts that never had ductwork or even a central AC.  They are LG and I did have a few issues but were able to resolve them.  They are extremely energy efficient.  I have had to clean one due to a tenant frying food all the time and clogging up the coil.  They are cheap enough that you could just by extras for spare parts.  Mitsubishi are the best but expensive then Fujitsu/LG.  Chinese brands such as Pioneer can be bought cheap but you get what you pay for.

David Floyd · Answer

I did everything but connect the freon lines.  Then I just called an HVAC installer to finish it up.  You really need to have some knowledge and tools to vacuum the lines, leak check, and charge it properly.  Good luck.

Ceril S. · Answer

@David Floyd We are looking to put a mini split into a small efficiency apartment that we are creating as a lock off unit/airbnb from - how tough was the install?  Did you install them yourself or did you need to have hvac/electrician do the installation?  Looking into options.  Thanks.

Christopher B. · Answer

@Eric Teran Thanks.  I'll keep that in mind for investments, or personal residences.

Christopher B. · Answer

I have heard that the MiniSplits should be supported with a different method of heat in the Winter.  Is that your experience?  Your location may not get as cold, or at least stay as cold as it does here in Michigan, but that is my inquiry.

Gary F. · Answer

Turns out they're quite expensive to install in remodels.  Better if new construction with exposed drywall, like most other mechanical and electrical systems.

Central Air HVAC vs Mini Split systems?

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