Mini split vs. duct-based systems - venting?
Since mini-splits only have the one head, how is return air collected? If it's taken in on the same head as the discharge, what's to stop conditioned air from being sucked back in the unit in an endless cycle, losing efficiency?
If I got a mini split it would also act as a dehumidifier for the area - or would it? Do you get dehumidification from a mini split like a traditional HVAC system?
Most Mini-splits control the compressor via a coil sensor located on the indoor unit. If it senses colder air coming across the coil, it either slows the comressor or cuts it off. It will not continue to run though. on many models, the indoor unit runs continuously in the cooling mode. The use only fractional HP so energy consumption on the blower is really not a big worry.
I live in a mostly dry climate , so dehumidification is not much of an issue . But , yes , we get condensate draining out of the indoor unit ( they have drain lines , I used 5/8" automotive heater hose to extend the drain line to a convenient place , outside ) .
We installed a new mini split in our bedroom , on the outside wall , centered over the head of our bed . It works very well , so far so good . :-)
Of course , so far we are just getting into 90 + degree weather .
This is our 2nd MS . We installed one about 2 seasons ago in our living room / dining room . Bue to windows and the entrance door , I was forced to locate the indoor unit pretty much , almost in a corner . Over the door . But with the aid of the ceiling fan to help distribute the conditioned air , it works well .
The bedroom unit is pretty much in the center of that exterior wall , blowing down the length of the bed . The louvers are set almost horizontal . I tried the louvers angled down onto the bed and it was COLD ! Could not stand that ! :-)
As it is , my wife almost freezes me , forces me under the covers in the middle of the night .
That unit is actually oversized , but it has the variable speed conpressor , so after it cools off the room ( which it does pretty quickly ) it tapers back to much less cool . It compleatly turns off the condenser unit when it gets yo the set point temp .
I have the indoor fan set on auto . It really slows down when the room cools off . Very quite ! :-) If Wifey has the ceiling fan on , it makes more noise than the MS .
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