dragonfrog, calligrafaffer on Nostr: npub1kr57u…qnwzy there are heat pump style hot water tanks? That sounds like a ...
npub1kr57unz6urh5m60tfur2phtjy4ksrf5uhhmhcj4f979xscyuh6kscqnwzy (npub1kr5…nwzy) there are heat pump style hot water tanks? That sounds like a great idea - ours is just a heat generator, so always sub-100% efficiency.