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by ece 1952 days ago
More modern heat pumps can be efficient at up to around -10 degF[1]. Higher efficiency federal/local rebates are not bad across the US, so I wouldn't be surprised if these were installed in some TX homes. It's still a capacity problem if average use is 10hr/day instead of 2hr/day and your house has no gas furnace heating. I would guess most TX (Dallas/Austin) homes probably do have a gas furnace, but maybe not in coastal/south TX (Houston).

[1] https://daikincomfort.com/go/aurora/