Residential Solar Is Easier and Cheaper to Install in Germany than the U.S.

The savings aren’t the panels themselves. Those costs are comparable. The difference comes almost entirely in “soft costs” — customer acquisition, labor, interconnection to the grid, and licensing.  When it comes to[...]

Payback Calculations

Easy to use payback calculator. The cost of installing Residential PV systems now cost about $4.50 a watt, down from $8.00 a watt a year ago. This link will get you to[...]

Wick DER Meets Thousand Home Challenge

The Wick Deep Energy Retrofit is the 16th home to meet the Thousand Home Challenge. They achieved more than a 75% site energy reduction from their Nov 09-Nov 10 baseline of 39,348[...]

Radon Abatement

Radon is a colorless, odorless, radioactive gas.  According to the EPA:  Radon comes from the natural (radioactive) breakdown of uranium in soil, rock and water and gets into the air you breathe.[...]


All materials at the Savoy house are being tested for toxicity.  Commonly used rigid foam boards such as extruded polystyrene (XPS) and expanded polystyrene (EPS) are made with flame-retardants; XPS owes its light weight to[...]

Empire State Building energy retrofit

This is the Empire State Building website’s page about their retrofit. There are many interesting links and facts posted here. I have enjoyed reading many of the pages related to and connected[...]

Mitsubishi Mini Split Heating and Cooling System

Used in Asia and Europe for decades these heating/cooling systems are gaining popularity in the US. During cooler months, it works as a normal heat pump, collecting heat from the outdoor air[...]

Zehnder HRV

The whole house heat recovery ventilation system works continuously to extract moist, stale air from wet rooms (kitchens, bathrooms and utility rooms) and supply fresh, filtered air to habitable rooms (bedrooms, living[...]

Passive House Alliance

Passive House Alliance strives to promote, educate, share and network about passive house building. PHA-US is an independent initially launched by PHIUS. It connects consultants with each other and with continuing education[...]

Passive House in the news

On September 25th, 2010 The New York Times ran a full-length article on the growing interest in super-insulated homes built to the new, Passive House standard. The New York Times article How[...]