Are some of your bedrooms too hot or too cold? This is a common problem in new homes. Often the master bedroom will be fine, but the other rooms get too cold or too hot during the night. The culprit is not necessarily your Heating and Air Conditioning unit. The culprit is the closed door.

Your guests won’t tell you if you have a problem. They’re too polite. Your kids probably have their door open when they are small and don’t have a problem.  Your teenagers probably don’t talk to you much anyway. How can you know if there’s a problem? It’s a good idea to spend a night in each of the other bedrooms in your house, particularly the guest room, if you have one, to see how the temperature goes with the door closed for eight hours. And do this on a cold night and a hot night. You might be surprised at what you find. (more…)

It’s freezing cold across much of the United States. Are you wearing passive solar clothes to stay warm?

I know it sounds like an odd question. We tend to think of using solar design for houses, not clothes. I’ll explain.

If you know it’s a cold day, do you think about what you’re going to wear? Of course you do. You might wear several layers. The layering forms more tiny air spaces around you and increases the insulating effectiveness of your clothing. You might pick out dark colors. Even if you don’t think of this as “passive solar dressing,” it is. dark colors absorb the radiant energy from the sun better than light colors. I’m sure when you’re outside on a cold, but sunny day, you walk on the sunny side of the street to stay warmer than you’d be on the shaded side. Ah! Passive solar principles, again. It’s nothing more than proper insulation and receiving the free energy benefit from the sun. (more…)