Product News & Reviews

Navien Condensing Tankless Water Heaters

Navien’s demand water heaters use conventional and condensing stainless steel heat exchangers to produce hot water with an industry-best 0.98 energy factor.
Environmental Building News—June 1, 2009

Retrofitting Exterior Foam on Existing Walls

The R-etro System from Quad-Lock makes installing exterior foam for deep-energy retrofits easier and less expensive.
Environmental Building News—June 1, 2009

Nexterra NSF-140-Certified Commercial Carpet Tiles

Bolyu and Cambridge carpet tiles with Nexterra backing were the first carpets certified to NSF 140-2007e, achieving the platinum level.
Environmental Building News—May 1, 2009

PureBond Exempt From CARB Testing Requirements

Environmental Building News—May 1, 2009

The First Practical Heliostat

Practical Solar has introduced a simple heliostat system to reflect sunlight into buildings for lighting and space heating; future applications will include water heating and electricity generation.
Environmental Building News—April 1, 2009

iCrete Mixes Stronger Concrete With Less Cement

iCrete is an approach to concrete mix design that uses a proprietary algorithm, informed by detailed analysis of available aggregates, to optimize particle packing and use only as much cement as necessary.
Environmental Building News—April 1, 2009

Coolerado Makes Solar Air Conditioning a Reality

Environmental Building News—April 1, 2009

Top-10 Products for Affordable Green Retrofits

Ten key product areas represent compelling opportunities for cost-effective, environmentally friendly retrofits to existing buildings.
Environmental Building News—April 1, 2009

Hypewatch: Energy Savings Claims from Power Conditioning Equipment

Power conditioning devices often promise across-the-board energy savings, but the claims don’t hold up in practice. These devices are good, however, for solving specific power quality problems.
Environmental Building News—March 1, 2009

PEX Tubing Passes California Environmental Review

Environmental Building News—March 1, 2009
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Ezkote Green

Mark Piepkorn says, “Looks like we were following the same path at the same time. :)” More...

Mark Piepkorn says, “Hi Tom - yeah, this is confusing. It's made by a subsidiary of US Mix, US Spec. Through some convoluted...” More...

Tom Curtin says, “found it at us spec.com” More...

Tom Curtin says, “Does not appear on manufactuer website!!” More...


CBRE Experiments With One-Day Energy Reductions

Allyson Wendt says, “Ethan, I just looked back at their press release, and those savings figures are for the single day (it isn't...” More...

Ethan Goldman says, “It's impressive that they were able to coordinate and move that fast (though I would be shocked if all the...” More...


Green Roof Study Finds Big Variation in Stormwater Retention

David Lanfear says, “I am appreciative of this testing and am very interested in the ongoing findings. As I research and develop living...” More...


Structure as Finish: The Pros and Cons of Leaving Off Layers

David Ottavio says, “Thank you both for your comments. The project that we are looking in to using this type of system is...” More...

Martin Holladay says, “David, While earth tubes were promoted in the late 1990s and early years of this century by Passivhaus Institut founder Wolfgang...” More...

Alex Wilson says, “There was a lot of interest in earth tubes to temper or preheat air for ventilation back in the '80s...” More...

David Ottavio says, “We are looking at incorporating earth ducts into the cooling strategy for a project in the early stage of design. I'd...” More...


2030 E2

Allyson Wendt says, “Hi Bill, I haven't seen anything like that--tools that really measure triple bottom line metrics are just starting to be developed.” More...

William Marston says, “Is anyone aware of someone working on such a tool aimed at the 350ppm target? Of course such a tool must...” More...