When HN users recommended it
1 HN user recommended this in 2023, in one comment.
20072026
Each tall tick is one HN user's first recommendation. A short tick is the same user again. Click a tick to jump to the comment.
1 HN user recommended this in 2023, in one comment.
Each tall tick is one HN user's first recommendation. A short tick is the same user again. Click a tick to jump to the comment.
The ability to be bidirectional only requires a $20 valve (first result from a search is https://www.amazon.com/Fdit-Conditioning-Reversing-Refrigera...). That's not the reason for the cost.