Will water well freeze in cold cellar

I have a room under the front stairs that is partially insulated with no vents. It has a water well and sump pump. If I put vents in, do I risk the water freezing?
I have a room under the front stairs that is partially insulated with no vents. It has a water well and sump pump. If I put vents in, do I risk the water freezing?
Keeping HVAC systems within the conditioned enclosure can be tough without a basement; one option is to use plenum trusses for the roof, which offer a space for equipment and ductwork.
"I have learned so much thanks to the searchable articles on the FHB website. I can confidently say that I expect to be a life-long subscriber." - M.K.
Get home building tips, offers, and expert advice in your inbox
Dig into cutting-edge approaches and decades of proven solutions with total access to our experts and tradespeople.
Start Free Trial NowGet instant access to the latest developments in green building, research, and reports from the field.
Start Free Trial NowDig into cutting-edge approaches and decades of proven solutions with total access to our experts and tradespeople.
Start Free Trial NowGet instant access to the latest developments in green building, research, and reports from the field.
Start Free Trial Now© 2025 Active Interest Media. All rights reserved.
Fine Homebuilding receives a commission for items purchased through links on this site, including Amazon Associates and other affiliate advertising programs.
Get home building tips, offers, and expert advice in your inbox
Become a member and get instant access to thousands of videos, how-tos, tool reviews, and design features.
Start Your Free TrialGet complete site access to expert advice, how-to videos, Code Check, and more, plus the print magazine.
Already a member? Log in
Replies
If you have an unconditioned space with filled water pipes, and the space is exposed to outside air, unless there is constant flow in the pipes, they will eventually freeze, if the outside temperatures remain cold long enough.
BTW, This past Dec. a lady called because the pipes froze in the crawl space under her house. Seems as though the crawlspace vents were open and the cold air blew in and froze the pipes. I made/installed plywood covers and it didn't happen again.
Thanks! I am hoping to do a small wine cellar and was concerned about the dampness / moisture level because of the water. That's why I want to put some vents.
Maybe I could also add a small heater to ensure the temperature doesn't go too low.
Is there such a thing as temperature controlled vents?
If the pump will freeze, the wine risks freezing too (though at a lower temp, since the alcohol acts as antifreeze).But keep in mind that in the summer, if the pump runs a lot (eg, watering the lawn) it can heat the place up quite a bit, vents or no vents.
In Alabama probably no.
In Minnesota probably yes.