I know this is off topic, but I haven't gotten much of a response in the other forum about it. I figured it is somewhat related here and you guys seem to be fairly knowledgeable. So I will do a copy and paste of my other post below. --- So I just had a new boiler installed in my house. It is 85% efficient and the guys over in the "Boilers" forum insisted it needs to be lined with a metal liner. It is currently clay lined and in great shape. Anyhow, I poked around a bit online about chimney liners and I was wondering if anyone has installed one themselves? The particular site I went to sold kits and it looks fairly straight forward. Given the price of their kit, I think maybe doing it myself my be a good idea. How do you guys feel about the liner insulation?

I just picked up 2 50+ inch cast iron standalone radiators that were used on a steam system that I am wanting to convert to hot water....can someone tell me if the supply goes on the top or the bottom. Thanks in advance.