Over All Rating Reviews :
The book surprised me when I first started reading it. I expected another "easy reader" on the subject. I was pleasantly surprised to find detailed explanations on why things should be done, situations where a particular improvement may not be the best, and how to approach the many different systems in a house - air heating and cooling, envelope, insulation, water heating, ventilation, etc. It was also refreshing to find different ways of examining the same system - for example, amount of fuel used for different heating systems, amount of heat generated for a particular type of fuel, and all the relationships between them.
As you start reading, you will find a lot of sidebars and short stories to highlight the discussion in the chapter. One thing I found slightly annoying is the number of Math Boxes that interrupt the flow of the book early on. These are sidebars that present sample calculations for the various topics, e.g. efficiency, fuel used for different heating systems, etc. I'd prefer the Math Boxes to be contained in an appendix with references in the main body of the book, but that's just me. Other readers may not find this annoying, and it's certainly not enough for me to reduce my rating of the book.
I highly recommend this book if you are serious about exploring ways to improve your house's efficiency. It's not an "easy reader", but it's well worth the time to read through it.
