I am curious about the zone map developed by LBL that is used for calculating Building Tightness Limits (BTL) The map is ubiquitous, but pretty crude. It certainly doesn't correspond to avg wind…Continue
"This is a great discussion. I'd like to ask a question about the distribution contribution to system efficiency.
I remember a matrix (from BPI, I think) that gave duct distribution efficiency based on insulation/no insulation,…"
"I did 2 projects last year, both on houses where the siding was being replaced.
The first, in Portland, was on a house where the stucco had failed. We dense packed the 2x4 walls w/ cellulose, then used 1.75" iso w/ rainscreen, then…"
"I live in a 100 year old brick house with double wythe exterior walls. A few years ago, I insulated the space between the inner and outer bricks. We live in a dry climate with 20 to 30 degree temp swings in the summer, so we religiously…"
"Here's how I use SketchUp. I typically do some pencil sketching first, then lay out a floor plan and perhaps a critical section or two in ACAD. I then transition to SketchUp Pro where I import the floor plans. I build the 3d model off the plan,…"
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