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To reach Ooty effortlessly, the mountain railway was founded. It was inaugurated in 1908. The working of the wheels on this narrow gauge is founded on the rack and pinion arrangement to aid it climb up the vertical mountain slopes. It travels through many tunnels offering several fantastic sights of the valley beneath. It heads through the dense forests you could see some wild animals such as elephants, monkeys, deer and wild boar on the way if you're fortunate. A tighter built home means less outside air infiltrating in the home, which means less oxygen to use for combustion within the furnace. As the furnace burns fuel and oxygen for combustion, it "eats up" surrounding air, which has to be "made up" with fresh air. If air cannot type in the home as easily anymore, this can cause serious issues. As the surrounding air is utilized for combustion, rather than substituted with oxygen, a negative pressure inside the space can happen. This could create combustion problems for the furnace, plus burn up fresh air for anybody inside the home.