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unfinished, daylit basement dehumidifier

tigerxj

Well-known member
Joined
Feb 21, 2013
Messages
210
Location
Clemson, SC God's Country
we are nearing completion of our new house. We are in upstate SC, temp yesterday was 99. humidity often very high as it is in the rest of the SE.

Our basement is daylighted to the back yard. It is set up with an in-law suite, that has a full bath and closet that measures about 500sqft.

The main area is about 800 sq ft. The remaining 700-800sqft is storage/shop area.

It will be an unfinished basement until I pay off student loans to finish it properly, but we roughed in plumbing for the above uses.

I will be insulating it with R19 (2x6 ext walls due to 2 floors above it) and sealing up the gaps with spray-foam-in-a-can.

I would like to add a dehumidifier, but I'm split between going with a lower end residential model like you see in box stores, versus a high end Santa-Fe type unit that is low temp useable, 100-150 pints/day, up to 2400sq ft, much more efficient, etc.

Complicating matters is that I'm not sure what I'll use for future hvac in the basement. We will likely go mini splits, probably at least 2 zone, maybe 3 zone, so each area of the basement can be controlled independently. The reason for this is we are using a 5ton unit for the main floor and 2nd floor, which is about 3000sqft. So I think the 5ton unit is probably already at its max capacity for square footage, and even though the basement doesn't take much to cool, I'm not sure it will be effective or efficient to just drop ducts down for the basement.

thus my conundrum. I don't like the idea of spending $1k or more for a Santa-Fe if I'm going to spend $2-4k in 5-10 years for a mini-split system. But I don't want to jack my power bill up with an inefficient consumer-grade dehumidifier.

I bought a humidity probe today to take some measurements over the next few weeks so get an idea of our RH and average temps in the basement. Its not fully sealed up yet as the door hardware isnt installed so the doors are usually open as laborers are in and out. We got our power meter this week, so they are planning to get the hvac going next week once the trim and drywall is done at the end of this week. That should give me a more realistic place to start.

i'm leaning towards the $200-300 range units at this point, but I don't know if they'll be big enough for almost 2000sqft in the basement. I can run them to a continuous drain since we have the plumbing roughed in.
 
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dancalvin12

New member
Joined
Jan 14, 2016
Messages
3
hey, i want you to upload some pictures of your basement, i also wants to setup a basement and for that i need to see this to get some idea
 

rburke65

Well-known member
Joined
Nov 10, 2007
Messages
12,349
Location
Canfield, Ohio
Wow....8 months old and only one response! Just buy the dehumidifier from the box store and plug it in to the outlet. Buy another if it still struggling to do the job.
 
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T

tigerxj

Well-known member
Joined
Feb 21, 2013
Messages
210
Location
Clemson, SC God's Country
funny, that's exactly what in did, 70pt dehumidifier. Hooked up to constant drain. I just leave it plugged in and running, and so far it has had no trouble keeping the basement pretty dry. Down in the 40s-50s% humidity over the window. In sure it will rise into the 60s this summer. We'll see. Fortunately I have two drains on opposite ends I can use. At this point I'm more concerned about the heat this summer. I think when we moved in last September it was hovering around 75.


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zmaxmotorsports

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Joined
Jan 11, 2013
Messages
11,948
Location
South of omaha
If the furnace and ductwork for rest of house are already in the basement Id just cut a couple of vents in and call it a day till you finish off the basement.;)
 
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mpire

Well-known member
Joined
Nov 21, 2008
Messages
1,861
Location
Florida
Where is your hot water heater? My heat pump water heater does a pretty impressive job of dehumidifying my garage. The condensate drain is constantly dripping here in Florida.

Just a thought, and the Water heater saves money and may come with incentives from the power company to make it a cheap decision.
 

finn

Well-known member
Joined
Mar 27, 2005
Messages
16,335
Location
The UP, God's country
I'll second the heat pump water heater idea. I bought one in on sale at Lowe's January and our local power company had a rebate deal that covered all but $50 on a water heater that normally costs $1100.

The heat pump will replace the dehumidifier we normally run in TH summer, I hope.
 
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tigerxj

Well-known member
Joined
Feb 21, 2013
Messages
210
Location
Clemson, SC God's Country
We've got a tankless hot water heater in the garage. It's definitely an interesting solution, one I hadn't heard of before. I'm new to all this so I appreciate the comments. We don't get too cold down here in the winter so it could be an option when we finish the basement to supply hot water to basement, heat, and cool.


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