Despite the cold temps 20 F last night, I went two days without a fire. The sunshine and no wind allowed me to run storage down to 106 F on top and 102 F on bottom. The house was still 70 deg. and I had plenty of hot water for my shower. I'm the only one here right now so recovery time on the domestic side isn't an issue. Just wanted to share how much I like the storage. I build a fire on my schedule and the boiler cools between firings so you can clean or maintain easily ! I highly recommend it for anyone with a wood boiler.