The Latest from the Energy Vanguard Blog

Bathroom exhaust fan brings humid air into the house
Posted by Allison Bailes on July 20, 2018
Nope.  Today is not the first of April.  Nor is this one of those special April Fools' Day articles I write at random times.  This one's real.  A white noise generator has now been used in at least one home to reduce indoor humidity.  And no, this isn't an amazing scientific breakthrough either....
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This fan should not be your first choice for keeping cool.  See point 4 below for the reason.
Posted by Allison Bailes on July 11, 2018
Here we are in the middle of air conditioning season.  So why don't we chop down some myths and misconceptions about ceiling fans.  What got me on to this topic was a video of a fan with blades that hide on top of the fan when the fan is turned off.  Sounds clever, but it's a ridiculous idea....
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Dew point isn't just for understanding condensation
Posted by Allison Bailes on July 9, 2018
I've been on a bit of a mission for the past several years.  My goal is to get more people thinking about humidity in terms of dew point rather than relative humidity.  Why?  Because relative humidity is misleading.  That whole "relative" thing is a bit slippery, you know. For example, I've had a...
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Good HVAC design is 99% invisible.  (Photo of living room by Ceylon Tea Trails from flickr.com, used under a Creative Commons license.)
Posted by Allison Bailes on July 3, 2018
Sometimes people are bothered by how things look.  They don't want a return grille showing in that location or they'd rather have the supply registers low on the wall or they just can't stomach the thought of a wall-mounted ductless mini-split anywhere.  We all have our preferences about how things...
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ventilation energy enthalpy recovery ventilator erv humidity
Posted by Allison Bailes on January 9, 2018
When I woke up Saturday morning, the temperature outdoors was -40 degrees†. The wind chill was -100 degrees! It was just unbelievably, impossibly, inhumanly cold outside. Fortunately, that was on a mountaintop in New Hampshire and not where I was. I happened to have woken up on a mountaintop in...
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Are door undercuts sufficient as return air pathways?
Posted by Allison Bailes on October 23, 2017
Most people don't know that simply closing a door in their home can make them sick, increase their energy bills, or reduce their comfort. We live in this invisible stuff called air. We pull many pounds of it into our lungs each day. A typical air conditioner, heat pump, or furnace easily moves 20...
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Perfect Balance in-door return air pathway
Posted by Allison Bailes on October 17, 2017
Your bedroom really doesn't aspire to be a balloon. Yet, because of the way your heating and air conditioning system was installed, it may be acting like one. At least to an extent. It doesn't expand the way a balloon does, but it does get blown up. Think about it. If your bedroom has a supply vent...
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Blower door test during a home peformance assessment
Posted by Allison Bailes on May 17, 2017
Dick Kornbluth was an insulation contractor in Syracuse, New York back in the 1970s. Then he discovered home performance. It's really the logical place insulation contractors, HVAC contractors, and similar companies to end up. Rather than doing just one job to make a building better, he did several...
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Posted by Allison Bailes on August 26, 2016
We design a lot of heating and air conditioning systems at Energy Vanguard. Alexander Bell, who goes by Andy, is our design wizard, and I've been getting involved with the process again lately. When I talk to potential clients, a lot of them tell me their contractor wants to size their air...
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illinois-lo-cal-house.jpg
Posted by Allison Bailes on July 1, 2016
In 2002, Katrin Klingenberg introduced the passivhaus program to North America when she built the Smith House in Urbana, Illinois. She had come to the US from Germany, where she studied architecture and got involved with passivhaus. But is this really where it all began?
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