I brought my system online last October and didn't do anything as far as insulating the pipes. I thought I would keep an eye on things to make sure I didn't have any leaks. I figured that when summer came, I would probably want to insulate the pipes because I am using the boiler for dhw and I figured my downstairs family room might get hot when I ran the boiler. So far, that hasn't been the case. The basement has stayed very comfortable, but I'm wondering if I should still insulate the pipes from an efficiency perspective? I am using weighted burns and with no heat load, I can raise the tank top temperature to my goal temp with a multiplier of 2. I.e., if the tank top is at 45c, and I want to raise it to 85c, I can raise it 40c by burning 80 lbs of wood (85c-45c)*2. It takes about 3-4 hours for the burn, with stack temps approximately 200c and wood mc is about 15-20%. There is usually a 5-8c temp difference between storage top and bottom (bottom being lower). My storage is unpressurized. So, what are the thoughts on insulating the pipes? I also thought I might just insulate from boiler supply to storage and then back to the boiler return. I'm thinking that when I am using the boiler for heat, the heat off the pipes just warms the rest of the house anyway. If you respond that I should insulate the pipes, I would appreciate any thoughts on how to go about it. I was wondering if the bag of foam pieces you can get at Lowes or Home Depot do anything.