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-   -   Mini split vs. duct-based systems - venting? (http://www.diychatroom.com/f17/mini-split-vs-duct-based-systems-venting-178576/)

sheslostcontrol 05-02-2013 07:30 AM

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?

yuri 05-02-2013 10:41 AM

Quote:

Originally Posted by sheslostcontrol (Post 1171128)
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? It sucks the air into the bottom of the head and shoots it out the top at a fairly high velocity. Or it takes it in the top and shoots it out the front/same idea. Goes thru an internal filter also. Has adjustable louvers to cause the air to go up to the ceiling and then that forces it down in a circle. Some also have a motor which moves those louvers so the air does a sweep motion,

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?

YES. Moisture condenses on any cold surface and drains off and a AC is a cold cooling coil.

Patrick Eubanks 05-03-2013 03:20 PM

mini-split control
 
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.


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