Cold Air Infiltration Into House Under Subfloor

Over the last couple years, I’ve wondered why our master bedroom was on average about 10°F cooler than the rest of the house during the winter. At first, I thought it had to do with poor insulation or that the central air registers in that bedroom were not supplying enough warm air from the furnace. Turns out cold air infiltration was the culprit and it was seeping into our bedroom from two locations. Air infiltration is a bad thing. No matter how much insulation you have, cold air infiltration leaking…
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Insulating Furnace Ducts in Crawlspace

Insulaing ducts

Once again, Melody homes did yet another crap job, this time “forgetting” to insulate the duct work for our central air furnace which happens to run through a ventilated crawlspace. The duct work spiders off into many different directions to supply heat to our house, of which about 100′ runs through our crawlspace. So, during the winter the crawlspace is the same temperature as outside; about 20°F. Whenever the furnace is off, the duct work cools off to about 20°F and takes a good 30 seconds to heat up. As…
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Colorado Blizzard on December 20th, 2006

colorado blizzard

This was another one of those infamous Colorado blizzards that snuck up with about a 1-day warning. The first forecasts from a few days earlier didn’t mention anything about a significant snow storm, only that we may get a couple inches of snow and some moderate winds. Then on Tuesday, the day before the storm hit, forecasters started hinting that this could be a pretty powerful storm. I figured it wouldn’t be that bad because a fairly potent yet uneventful cold front had already pushed through a few days earlier….
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Sealing Furnace Ducts with Mastic

Where we first bought our house, I found the ducting leaked a lot of conditioned air into non-conditioned spaces. Wherever two pieces of ducting connected to one another, there were gaps from which condition are leaked into unwanted areas. I was loosing quite a bit of energy by unintentionally heating parts of the house no one lived in, and was probably making it comfortable only to the bugs and other critters that might like some warmth during the winter months. Same goes with an cool air conditioner (if we had…
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Cold Air Blowing Through Wall Outlets

Air infiltration occurs when outside air finds its way inside your house. Most people notice this in the winter when cold air blows through a wall outlet on an exterior wall. Or in the summer when the hot 100°F air finds its way into your cool inside living space. You can expect higher heating and cooling bills if you have a lot of air infiltrating into your home. There are numerous locations from which outside air can find its way inside. Even more so in older houses, which are not…
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Facts About Thunder

What causes thunder? Thunder is caused by the rapid expansion and contraction of the air surrounding a lighting bolt. On average, a lightning bolt is about 5 times hotter than the surface of the sun, or about 50,000°F! This causes the air to become super-heated and as a result, the air rapidly expands in fractions of a second. However, the air doesn’t stay super-heated for long and quickly dissipates the heat in fractions of second. It’s this rapid expansion and contraction of the air that creates a compression wave we…
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Should You Open Windows During A Tornado?

A long standing tornado myth states that if you open windows during  a tornado, it will prevent the roof from being blown off. There’s another myth that says you should only open north facing windows. I’m not sure where these myths originated, but they are both pretty silly. It’s really a matter of simple physics. Watch the small video to the left. Open windows would not have made difference and the outcome would have been exactly the same; the house would still have been destroyed. The roof on most well…
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