how far can I park from a fire hydrant in CA?
ASTM 128 A should be a nearest match However it’s wise to check sub grades too for a precise match
They don't help much, especially if you have to buy much of what you burn. The reason is that when there's a fire, the chimney draws air up, and it not only draws the hot air from around the fire, it draws the warm air from the rest of the room and maybe the house too. You may feel warm when you're near the fire, but that's from radiant heat which heats objects and not the air. If you leave the chimney damper open when you don't have a fire burning, or if it doesn't close fully and many don't, the chimney will draw air from the house all the time, the air that you paid to heat with oil. I didn't realize how much this was true until I was up on my roof one summer day cleaning the chimney. The damper on my woodstove was mostly closed, but there was still enough draft coming up the chimney to ruffle my hair and blow soot into my face. The chimney was functioning as a chimney even though there was no fire in the stove. A woodstove or fireplace insert, on the other hand, keeps the amount of air going up the chimney under much better control, which means that not so much air is going up the chimney from your house, and also that you can control how fast the wood burns for best efficiency. An open fireplace burns too fast to get the maximum heat out of burning wood. And you never burn those prepared logs in a woodstove.
