One of the hottest topics in energy efficiency and building science is “how should you insulate your attic?” Why? Simply put, the attic has more impact on your efficiency and comfort than any other single part of your home!
Let’s summarize why the attic is so important:
The attic is the hottest part of the house in the summer and is cold in the winter
Hot air rises up to the attic / cold falls drops into the living space
Moisture rises and accumulates in the attic
Central heating/AC systems and ductwork are often in the attic
If you’ve bought or sold a house in the 21st century, chances are good that you’ve had to read a mold report. Mold has become the latest bogey-man, leading to considerable (often unnecessary) concern and expense. But it’s become a fact of life that we all have to deal with, so I’m going to do my best to describe the reports so you can interpret them properly.
Before starting, be aware that this post does not contain a detailed discussion of mold varieties, allergies, cleanup, or other such details. There are numerous sites that contain that sort of information.
One caution – due to all the FUD (fear, uncertainty and doubt) there is a huge industry built around “mold remediation.” You will find countless websites of mold companies whose sole purpose is to sell you expensive mold remediation services. Their angle is often to prey on consumers’ fears. As such, you are advised to rely on independent sites for more accurate information on mold. Many states maintain mold awareness sites and have documents available that provide detailed information on how to clean and deal with mold.
I was recently sent this excellent set of references on mold. The very mention of mold sends shivers up people’s spines and makes them start sniffling, worrying about adverse effects. These references help to answer your questions and learn how to deal with your mold problems.
In an effort to make Ted’s Energy Tips even more useful, I’ve changed to an ultra-minimal layout to keep the site focused on what’s important – the content.
Gone are the distracting sidebars and hopefully many of the ads that get inserted automatically into my content. What remains is just the list of articles and a simple menu at the top right of the page.
Click on the menu to search or find other site content.
And, as always, keep submitting your great questions!
Humidity. Moisture. Water vapor. Evaporation. Condensation. Mold. Rot.
These are all words that go together in people’s minds when the topic of humidity comes up. But what is it and why is it so important?
I’m going to try to explain this as simply as possible, so for the scientists and engineers reading – please cut me a little slack. I’m going for clarity over precision. However, if you catch the inevitable factual errors, please point them out so I can correct them.
I recently had an interesting question – a reader asked what could cause a Fujitsu mini-split air conditioner to cause the air to become *more* humid. In fact, they noted that the air became highly moisture laden and the house was just yucky humid.
I really scratched my head on this one because, from a physics standpoint, under “normal” conditions, this is impossible with a mini-split. Why? Because a mini-split system has an air handler unit in the house with the only connection to the outside (and outdoor humidity) is through a small hole in the wall where the electrical and refrigerant lines run. And yet it happened.
The questioner noted that multiple units were involved and that various parts of the electronics had been changed, and yet the problem persisted. He noted that he’d heard of a number of other people with the same problem. I admit, I was baffled!
Then it came to me. In fact, I had worked with an associate, helping them to track down this exact problem. While I can’t state with 100% certainty that the problems were the same, the symptoms are the same. In addition, I realized that my own home’s systems exhibited the same issues, but I automatically made the adjustments to make the systems work properly!