Sold all my gas heaters and here in Jordan they are propane tanks, not a vent system. So you have portable heaters with a large propane tank riding inside these useless heaters. You have to cook with propane too so there is a large propane tank under your stove top. They you have a separate gas oven with a large propane tank attached. So you get the picture, leaking propane tanks everywhere.
The best thing I did was read book 1. Besides moving on to electric the other thing is proper window ventilation. Love the part about the man removing his window in the bedroom.
It is costing me more for electric but not that much, when you consider the cost of gas and look at the bill, it is costing me around twenty percent more. Not much, to save your life.