What if you lived in a house without a furnace in Minnesota? Or the frozen, windsept tundra-like landscape that is central Illinois right now? And you didn’t have a wood burning stove, fireplace, or radiant floor heating.
You would freeze, right?
Not if you lived in a Passive House. These super-insulated, air tight homes that use the heat from the sun and the heat generated by appliances and body heat to heat the entire the house. Even when it’s below freezing outside.
I was here today.

This is the South side of a Passive House built in Illinois. Today, it was in the mid 20’s and sunny. No one is living in this house yet and there are no appliances running or any sort of heater turned on. It’s been about a week since anyone has been inside. And it was about 60 degrees inside. Pretty amazing, huh?

This is the main living space (picture taken last summer). The floor is actually the concrete slab. It works as a “thermal mass” to help regulate the temperature inside the house. It retains its heat (or lack of) for a long time and therefore helps to keep the house warm in the winter and cool in the summer.

This is a den on the first floor. All of the windows on the South side of the house are this big to let a lot of sunlight into the house in the winter. In the summer, exterior shading keeps the sunlight out, helping to keep the house cool. The windows all have 3 panes of glass, low-e coatings, insulated frames and are argon filled. Translation, the windows are very well insulated when compared to you typical single pane window.

A whole house mechanical ventilation system keeps the indoor air fresh and an Energy Recovery Ventilator reuses the heat (or lack of… “coolth”?) from outgoing air to condition the incoming fresh air so that is warm or cool before it is distributed into the living spaces and the bedroom pictured above.
Add some super energy efficient appliances and the house uses about 75% less energy than a house built to the same size with standard construction methods. A Passive House in a nutshell. It’s possible to build them anywhere (even where cooling is your primary concern). And they’ll help conserve our world’s scarce resources and the money in your wallet.
One of these is definitely on my wish list! Now I just need the money… (p.s. they only cost about 10% more than a regular house!)
Check out more projects at passivehouse.us.
