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Concentration of CO2 in the Atmosphere

For Sale: 60-Watt Equivalent Halogen-Incandescent Lightbulbs – $82


Mark Koprowski

While shopping at a local retail store, I noticed that incandescent light bulbs were still for sale, and I watched customers picking them up to compare their purchase cost to that of LED bulbs. I wondered if they understood that the LED bulbs might cost a few cents more to […]

LED It Shine

LED bulb with Edison base. Photo: Artoria2e5, Wikimedia Commons.

George Harvey

Green Energy Times has had a number of articles on light emitting diodes (LEDs). LEDs can be used for lighting in homes and businesses, for street lights, for flashlights, for vehicle headlights, and more; and in every instance we […]

NHSaves Drive to Net-Zero Competition Winners

The second place winning home of the NHSaves Net-Zero Competition. Photos: Elizabeth and Mark Peterson

George Harvey

NHSaves is a partnership of the New Hampshire utilities, Eversource, Liberty Utilities, New Hampshire Electric Co-Op, and Unitil. Last year, it established the annual Drive to Net Zero competition to showcase especially high-performance […]

Changing the Roofing Equation

Basics for an Efficient Roof

In a “cold” roof system, the air barrier and insulation are in contact with each other and located at the ceiling/attic floor. This design prevents heat from leaving or entering the living space while moisture is vented. “Warm” roofs are not vented and have the insulation installed directly on […]

DIY Energy Upgrades: Doors

Steel, aluminum and plastic brush sweeps, door shoes on lower right.

Dave Keefe

It sure is annoying when your exterior doors leak a bunch of air – cold air in, or your warm air out, or both – but there are things you can do to tighten them up.

First, consider a storm door […]

First Net-Zero Multi-Family Building in Region to Open

How Twin Pines Set the New Gold Standard for Sustainable, Multi-Family Living

When it opens this fall, Tracy Community Housing will be a sleek, stylish and sustainable addition to West Lebanon’s residential area. Photos courtesy of Twin Pines Housing.

Chris Gillespie

Affordable housing developer Twin Pines Housing Trust will make history this fall by […]

AeroBarrier Case Study: Partial Renovation of 1700’s Brick Colonial

Nate Gusakov

This is the third article in our series highlighting our experiences installing AeroBarrier around New England– here’s a quick refresher on the technology:

AeroBarrier installation is underway for the 1700’s brick home. Images courtesy of Nate Gusakov.

AeroBarrier® is a patented, cutting-edge envelope sealing system that simultaneously measures and seals building envelope […]

Buildings to Cool the Climate

Images courtesy of Bionova Ltd.³

Kai Starn

The Intergovernmental Panel on Climate Change (IPCC), viewed as the most credible source of climate change research, issued an alarming report¹ on October 2018 removing all doubt on this critical topic. Absent aggressive action, the atmosphere will warm up by as much as 2.7° F above […]

Revamped HHI Tool is First Step to a More Energy-Efficient Home

With an eye on making life easier and homes more energy efficient, NHSaves has unveiled a revamped online tool that calculates fuel usage and qualifies residential customers for rebates and incentives through the Audits and Weatherization program.

The improved home heating index tool (HHI), which launched on the NHSaves’ website on […]

Energy Audits for the Home Owner

The naked eye cannot detect heat loss in a home. Photos courtesy of Michael Canavan

Michael Canavan

In today’s home environment, greater consideration is given to the energy usage of residential buildings – from multi-unit buildings to tiny houses. The adoption of higher performance energy codes is helping to improve energy usage in the […]