heat loss

Marc Rosenbaum Offers a Free Online Lecture

Posted on February 01,2015 by GBA Team in education

Heat loss from basements and slabs to the ground is complicated. If you're interested in learning more on the topic, you might want to take advantage of a free lecture being offered by energy expert Marc Rosenbaum. At 1:00 p.m. on Thursday September 4, 2014, Rosenbaum will offer a free online lecture on heat loss to the ground. The presentation is intended for architects, builders, and others who want to have a better idea about how buildings interact thermally with the ground and how to calculate heat loss to the ground.

Heat Losses Are Way More than Planned

Posted on February 01,2015 by ScottG in ductless minisplit

Bob Holodinsky was hoping for a better outcome from the heat loss calculations he received for his new Peterborough, Ontario, home — calculations that appear to have upset his plans for heating with a ductless minisplit. "I thought I was on the right track," he writes in a Q&A post at GreenBuildingAdvisor, "but now I am not so sure."

When Do I Need to Perform a Load Calculation?

Posted on February 01,2015 by user-756436 in cooling load

In my last three blogs, I discussed the basics of heat-loss and cooling load calculations. The unfortunate truth about these calculations is that fast methods aren’t particularly accurate, and accurate methods require making measurements, checking specifications, and entering data into a computer program — in other words, a significant investment of time. So how should builders go about making these calculations?

How to Perform a Heat-Loss Calculation — Part 2

Posted on February 01,2015 by user-756436 in design temperature

To continue last week’s discussion of heat-loss calculation methods, let’s consider a simple rectangular building, 20 feet by 30 feet, with 8-foot ceilings. Let’s assume it has an 8-foot-high basement with uninsulated concrete walls; the below-grade portion of the basement is 7 feet high, with 1 foot above grade. To keep things simple, we’ll assume that the house has a flat roof, and that each side of the house has two windows (each 3 ft. by 4 ft.) and one door (3 ft. by 7 ft.). The house doesn’t have a chimney.

How to Perform a Heat-Loss Calculation — Part 1

Posted on February 01,2015 by user-756436 in heat load

I’m going to devote the next several blogs to a discussion of heat-loss and heat-gain calculations. These calculations are the first step in the design of a home’s heating and cooling system. In order to address this big topic in little bites, I’ll start by discussing heat-loss calculations. I’ll get around to heat-gain calculations and cooling equipment in a future blog.

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