- My Forums
- Tiger Rant
- LSU Recruiting
- SEC Rant
- Saints Talk
- Pelicans Talk
- More Sports Board
- Fantasy Sports
- Golf Board
- Soccer Board
- O-T Lounge
- Tech Board
- Home/Garden Board
- Outdoor Board
- Health/Fitness Board
- Movie/TV Board
- Book Board
- Music Board
- Political Talk
- Money Talk
- Fark Board
- Gaming Board
- Travel Board
- Food/Drink Board
- Ticket Exchange
- TD Help Board
Customize My Forums- View All Forums
- Show Left Links
- Topic Sort Options
- Trending Topics
- Recent Topics
- Active Topics
Started By
Message
HVAC for basement
Posted on 4/22/21 at 9:24 am
Posted on 4/22/21 at 9:24 am
I have a 520 square foot basement whose walls are concrete block. I plan to divide it into two bedrooms and using mini-splits for heating and cooling. It won’t need much since it never gets very hot nor very cold, but I’m concerned with high humidity. I’ve had five HVAC people come to give me quotes. Four quoted two 9000 btu inside heads with one 18000 btu outside unit. One guy says that 18000 is too much as it won’t run enough to pull the humidity out. He wants to use one 9000 single mini split in one bedroom with through- wall ventilators to force air into the adjoining bedroom along with a dehumidifier. I’m getting confused with all of this. What say you guys?
4
Posted on 4/22/21 at 11:44 am to Edwardo
Sounds like the guy who says 18,000 BTUs is to large might be correct as basements don’t have much heat load (no roof, minimal air filtration, etc.) but here’s a free on-line manual J calculator for estimating heat load and sizing of the HVAC (manual S) LINK if you want to try to estimate it yourself. If a HVAC is not running, it’s not dehumidifying.
I can’t tell you if the single 9000 BTU guys approach for distributing air among 2 rooms is appropriate, but did no contractor mention a single mini-split with 2 heads option - 1 per room?
Also since humidity is often the major comfort issue in basements, have you thought of coupling the HVAC with a dehumidifier which control humidity when the HVAC is not operating?
I can’t tell you if the single 9000 BTU guys approach for distributing air among 2 rooms is appropriate, but did no contractor mention a single mini-split with 2 heads option - 1 per room?
Also since humidity is often the major comfort issue in basements, have you thought of coupling the HVAC with a dehumidifier which control humidity when the HVAC is not operating?
This post was edited on 4/22/21 at 11:54 am
Posted on 4/22/21 at 11:59 am to Edwardo
I don’t even know what a basement is
Posted on 4/22/21 at 12:19 pm to Edwardo
I don't have much to add as my basement stays around 60 in winter and 67 during summer. I installed a santa fe dehumidifier to keep it around 40-45 percent and use it unconditioned. Is it an option for you to just dehumidify? I don't know your temperature ranges.
Posted on 4/22/21 at 2:42 pm to Edwardo
I would check into putting in a whole house dehumidifier if you don't have much temperature fluctuation. We finished our basement and installed one. Works well to keep it comfortable.
Posted on 4/23/21 at 9:58 am to CrawDude
“but did no contractor mention a single mini-split with 2 heads option - 1 per room? “
Is that not the same as I mentioned in the original post? All of them said that 18000 btu is smallest dual zone outside unit. And yes, the last HVAC guy suggested a dehumidifier also.
Is that not the same as I mentioned in the original post? All of them said that 18000 btu is smallest dual zone outside unit. And yes, the last HVAC guy suggested a dehumidifier also.
Posted on 4/23/21 at 10:57 am to Edwardo
quote:
Is that not the same as I mentioned in the original post? All of them said that 18000 btu is smallest dual zone outside unit.
You did - my bad. I didn’t know a 18K BTU was the smallest dual zone unit but it makes sense it would be.
Page 1 of 1
Popular
Back to top
Follow TigerDroppings for LSU Football News