diesel locomotive models

William went on a marvelous journey six hundred years back over time along with his nanny, Mrs. Phillips, inside first book, The Castle in The Attic. He met Sir Simon and defeated the villain, Alastor. This book starts with William being a couple of years older and Mrs. Phillips sent him a birthday present, the charm of Janus used inside the first book. The charm can be used to shrink and un-shrink things, animals, the ones. Then, if these shrunken folk spend the night time in the castle in William's attic, they wake up inside past. The attic is finished, along with a forest is away from castle. 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.