this post was submitted on 03 Jan 2024
124 points (97.7% liked)
Asklemmy
43945 readers
638 users here now
A loosely moderated place to ask open-ended questions
If your post meets the following criteria, it's welcome here!
- Open-ended question
- Not offensive: at this point, we do not have the bandwidth to moderate overtly political discussions. Assume best intent and be excellent to each other.
- Not regarding using or support for Lemmy: context, see the list of support communities and tools for finding communities below
- Not ad nauseam inducing: please make sure it is a question that would be new to most members
- An actual topic of discussion
Looking for support?
Looking for a community?
- Lemmyverse: community search
- sub.rehab: maps old subreddits to fediverse options, marks official as such
- !lemmy411@lemmy.ca: a community for finding communities
~Icon~ ~by~ ~@Double_A@discuss.tchncs.de~
founded 5 years ago
MODERATORS
you are viewing a single comment's thread
view the rest of the comments
view the rest of the comments
Look up the model number. There are some that maintain 100% capacity down to negative temps, and there are some that lose capacity as the temperature outside drops. You can look up something called a “submittal data sheet” to find out the output capacity at different temperatures.
Capacity is measured in BTUs. So, if the heat pump is a 30,000 BTU model and it’s 47 degrees outside, it may produce 30,000 BTUs. However, at 17 degrees outside, it may only produce 20,000 BTUs. At -5 F, it may only do 10,000 BTU. Other models will keep 30,000 BTUs all the way down to -15F. The trade off is they use more electricity. Checking the data sheet can help you figure out what your model is capable of.
Mitsubishi is generally regarded as the best brand and they sell a line called “hyper heat.” These maintain capacity in low temps. Other brands have similar.