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KG4ONJ 03-13-2013 06:15 PM

Ductless System - Heat/Cool 2 rooms with 1 indoor unit?
 
I have a Daikin 3-Port Ductless system installed by a local contractor in my basement. Currently I have two of the three ports used on two rooms in said basement. I have recently completed an addition of about 450 square feet on to the back of the basement and am having a third indoor unit installed next week by the same contractor.

This new expansion is divided in to two rooms - one will be used for a workshop approximately 10-12 hours per day (my wife and I run a small service business out of our home) and the other room will be used for shelved storage of moderately delicate items. These two rooms will be separated by a framed and insulated wall with a door.

Of course I am having the new third indoor unit installed in the workshop that we will be spending most of our time in. I would like to at least partially moderate the climate in the storage room as well by "sharing" some of the air in the workshop. Is there any way to accomplish this by installing a couple of vents in the separating wall or perhaps even a small fan or two to blow air from the workshop in to the storage area (or vice-versa)? I don't need the storage room to be necessarily "comfortable", just keep the temperature above 60 in the winter and below 90 in the summer (we are in the Atlanta area). The side benefit would also be to keep the humidity down a little.

I understand that without either a direct 4th system or a supply/return setup that I won't be able to have any kind of strict control over the climate - I just need a solution to "take the edge off" so to speak.

Thanks for any help you can offer.

beenthere 03-13-2013 06:29 PM

Put a vent high on the wall and low on the wall.

KG4ONJ 03-13-2013 06:34 PM

Quote:

Originally Posted by beenthere (Post 1136586)
Put a vent high on the wall and low on the wall.

Thanks for the reply! Any suggestion for what size vents or what style?

What will this do for me in the end?

beenthere 03-13-2013 06:51 PM

Quote:

Originally Posted by KG4ONJ (Post 1136590)
Thanks for the reply! Any suggestion for what size vents or what style?

What will this do for me in the end?

14X8 Hart&Cooley A650.

Ho much they will do will depend on how packed the storage room is. They should get you about what you want, except for humidity control. That is dependent the workshop humidity also.

The A650 is a fairly free flowing register. So make sure you don't put a desk in front of it, or someone could get old feet.

KG4ONJ 03-13-2013 09:28 PM

Quote:

Originally Posted by beenthere (Post 1136603)
14X8 Hart&Cooley A650.

Ho much they will do will depend on how packed the storage room is. They should get you about what you want, except for humidity control. That is dependent the workshop humidity also.

The A650 is a fairly free flowing register. So make sure you don't put a desk in front of it, or someone could get old feet.

Excellent! Should I create a duct through the wall between each grille pair? Is there any kind of "pre-fab" item for this to go through a 2x4 wall?

beenthere 03-13-2013 09:48 PM

No need for a duct. No prefab that I know of.

AtticFoil.com 08-27-2013 10:06 PM

Ductless mini-splits are great for a lot of applications. The challenge can be getting air into a small side room. Take a look at a product called AirShare by Tjernlund. It's a retrofit fan that uses the cavity between two studs as a duct. The fan is installed low on one side to draw air in and a vent is installed high on the other side to distribute the air. Install right below an electrical outlet and hardwire it for power. They work well and are really quiet.

hvactech126 08-28-2013 07:19 AM

I agree you should look at the aireshare.


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