depression guilt anxiety

A tighter built home means less outside air infiltrating in the home, which in turn means less oxygen to use for combustion within the furnace. As the furnace burns fuel and oxygen for combustion, it "eats up" the nearby air, which has to be "made up" with fresh air. If air cannot type in the home as quickly anymore, this could cause serious issues. As the surrounding air can be used for combustion, and not substituted for fresh air, a bad pressure in the space can take place. This could create combustion trouble for the furnace, plus consume fresh air for any person inside home. The story shocked me more than usual because I know my friend is a fairly good martial artist. He is often dubbed as 'talented' by his colleagues and superiors. What's wrong with this story? In theory, he may have wasted the thief quickly while he clearly had no weapon with him. According to him, he didn't know what to do. He knew how he could subdue such assault but he just did not know how to handle it at that time.