The complete source for building, designing, and remodeling green homes

Musings of an Energy Nerd
The Manual J Dilemma

It’s hard to get a contractor to provide an accurate heat-loss or heat-gain calculation
Guest Blogs
Replacing a Furnace or Boiler

A 15-minute way to calculate design heating load when sizing replacement equipment
Musings of an Energy Nerd
How to Perform a Heat-Loss Calculation, Part 1

Let’s begin by discussing outdoor design temperatures and the many ways that heat can escape from a house

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The Manual J Dilemma