Hygric Buffering & Cellulose Wall Insulation

This is a two-part blog about hygric buffering, cellulose wall insulation, and moisture problems in high-performance buildings. Why not to install cellulose insulation in deep wall cavities Cellulose shrinks, slumps, and dries very slowly after wetting. Deep wall...

New RESNET CEUs Available Now!

Introducing 29 New RESNET CEU Courses Attention raters, rater trainers, and RESNET training organizations: Saturn Resource Management now offers 29 new short courses that qualify for RESNET CEUs. These short e-learning courses mix media such as slides, slide...

ASHRAE 62.2-2013 Confusion

We’ve been dealing with the ASHRAE ventilation standard for a while. 62-89 goes way back. We used that one for a long time, and it worked well enough. After we taught our students how to use 62-89, they could understand it and implement it. Then came 62.2. We...

New Homes: Efficiency Priorities

Focus on the Envelope Home owners and builders seldom give the building envelope the priority it deserves. The insulation, air barrier, windows, and doors are the most important features of a new home. These envelope features determine a home’s energy efficiency...

Knowledge Management (KM) Now

KM’s History Knowledge management has a long history, including apprenticeship programs, discussion forums, corporate libraries, professional training, mentoring programs, and now data bases designed to manage knowledge. Computers and software have enhanced our...

Educational Credit Made Easy

What is a credit? Saturn uses a formula to calculate how many average hours of student effort that a lesson or course requires. Of course, effort hours differ among different students, but our calculation is a good average. The easiest way to understand the convoluted...

What is Electricity

What the EPA Says EPA’s new final rule on Carbon Pollution Emission Guidelines for Existing Stationary Sources: Electric Utility Generating Units  “Energy is transmitted, not electrons. Energy transmission is accomplished through the propagation of an...

More on Moisture and Insulation

The Experimental Findings Building Science Corporation (BSC) published a recent report that spawned a Journal of Light Construction (JLC) article called “Moisture in Fat Walls”. Two of the three walls studied are double walls with R-values in excess of...

Evaluating the Need for Supplemental Combustion Air

This post is a revised version of the last post about Evaluating Combustion Air. The changes are a result of the many discussions I had with the experts in the previous post. You know who you are. Thank you. I continue to value your suggestions. Feel free to comment...

Evaluating Combustion Air

Hey, I would really appreciate some feedback on this method of evaluating combustion air. Unnecessary Holes in the Building Contractors often cut combustion-air holes in ceilings, floors, walls, and doors without knowing whether the combustion appliance zone (CAZ)...