This simple system for recovering heat from wastewater makes a lot of sense—especially for families and commercial buildings that produce a lot of hot water.

by Alex Wilson

Over the past few weeks I’ve written about various strategies to produce hot water efficiently. We’ve seen that tankless water heaters are more efficient than storage water heaters (though are not without their drawbacks), and we’ve learned that heat-pump water heaters produce two to three times as much heat per unit of electricity consumed as electric water heaters that rely on electric resistance heat.

Sustainability might not come naturally to us, but maybe we’ll get past that if we can teach our children well. Minecraft helps kids in Kenya show how real places could be transformed.Photo Credit: FyreUK
New federal regulations beginning in mid-April 2015 will require that larger electric water heaters be heat-pump models. It’s time to pay attention to this option.
Public facilities don’t have to be ugly, we can now hear air pollution, and the sports industry is going for the gold with green initiatives.
A relatively new type of water heater combines features of both tankless and storage water heaters. A.O. Smith's NEXT Hybrid water heater.Click to enlarge.Photo Credit: A.O. Smith


Phobia or fatigue? When it comes to toxic chemicals, we all have our own way of coping with information overload. A free webcast helps you sort it all out.

Droughts are cracking foundations and cars are blocking crosswalks. Meanwhile, Martin Holladay debunks “greenest home on earth” claims. Sam Martin's "SkyCycle" concept would elevate bike lanes to new heights in London.Photo Credit: SkyCycle screen capture

NYC made history this week by releasing a huge dataset of actual building performance—including some blank spots for buildings that didn't comply with the law. NYC is making history, but other cities are soon to follow.Photo Credit: Alex Wilson

While they have higher efficiency, for most applications tankless water heaters don’t make sense.

by Alex Wilson

There are two primary types of water heaters: storage and tankless. In this column I’ll try to explain the differences between these two approaches and offer some guidance on choosing between them. (There are also “hybrid” water heaters with features of both that I’ll cover in a future blog post.)

While India stands on the brink of modernizing its grid, angry Texans take up the charge against smart meters, citing privacy concerns.

Flashing and air barrier seam tapes get buried deep in our walls where we rely on long-term performance without monitoring them. Are they doing their jobs?

by Peter Yost

This is part of an ongoing series. Read all the Sticky Business posts here.

Those ubiquitous exit signs use a huge amount of electricity; a little-known alternative to conventional LED products offers surprising savings.
Big wind is getting bigger, but can we save the tax credits that help it grow? Also, how to read palms skylines, and new Passive House partnerships.
An update on getting the global warming potential (GWP) out of insulation materials.

Exterior adhesives and sealants are formulated for performance, but some contain chemicals that pose risks to unprotected workers or the environment.

by Brent Ehrlich

This is part of an ongoing series. Read all the Sticky Business posts here.