<div class="post"> <div class="date">2026-04-10</div> <div class="main">Can AC work as a heat pump in winter?</div> <div class="reply">– user1: yes but efficiency drops</div> <div class="reply">– me: COP ~2–4 in mild cold</div> <div class="reply">– user2: what about -20C?</div> </div>
<div class="post"> <div class="date">2026-04-10</div> <div class="main">Japan akiya homes sell for pennies</div> <div class="reply">– user1: interesting for remote work</div> <div class="reply">– me: depopulation is key factor</div> </div>
<div class="post"> <div class="date">2026-04-09</div> <div class="main">Brain waves during sleep vs infrasound</div> <div class="reply">– user1: fascinating overlap</div> <div class="reply">– me: both in low Hz range</div> </div>