If all the ductwork must be replaced or added inside intact walls, it can cost $2,700-$12,000 or more to install gas central heating with a standard-efficiency gas furnace and $3,500-$22,000 or more with a high-efficiency unit.
I want to make a different-sized blanket! How much wool do I need? In my experience, you get about 600 square inches per pound of wool. Why do I have to felt the wool? I thought superwash wool doesnât felt!
It can be a little tricky to estimate exactly how much yarn you'll need to make your own blanket, since patterns can vary widely, but here are some basic guidelines to get you started: 1  Sock weight: 1,300 yards. 2  Sport weight: 1,200 yards. 3  Light weight: 1,100 yards.  Worsted weight: 1,000 1  yards. Bulky weight: 900 yards.