Post Content

Ann Berwick

Ann Berwick

EEA Undersecretary for Energy, Executive Office of Energy and Environmental Affairs

View Ann’s Complete Bio

My family has had a small cabin in New Hampshire for about ten years. We set our propane heater at a very low level in the winter when we’re not there to make sure our pipes don’t freeze — and turn it off entirely in the summer — and we heat primarily with wood when we are there, so it’s fairly energy-efficient. However, with an expanding family, we have seriously outgrown the cabin.

New Hampshire home

To make a very long story (perhaps to be pursued in additional blog entries) short, we decided to build a new house, but only after deciding to make it as energy-efficient as we possibly could. Our aspirational goal is the Passive House standard, which is becoming the norm for new buildings in some parts of Austria and Germany, and achieves reduction in heating-related energy of about 90 percent.

The house, which is under construction, will be super-insulated — to a degree very unusual in this country. From outside to inside, there are four inches of styrofoam, two inches of sprayed polyisocyanurate, and then six inches of blown in cellulose. This gives the walls an insulation value of R60. The house is essentially framed twice — a house within a house — to allow for the blown-in cellulose insulation. The windows are triple pane, with inert gas between the panes. We were unable to find American-made windows that met our specs, and ultimately ended up with windows from Ontario, Canada.

While these measures are somewhat expensive, the costs are at least partially offset by eliminating entirely the need for a furnace (and this is in central New Hampshire). We anticipate using only a very small wood or wood pellet stove, a back-up propane heater (which we hope we will not need to use at all) to prevent a freeze-up, and minimal electric heat in the bedrooms when they’re occupied.

Despite all this, the house does not quite achieve Passive House standards, for a few reasons. First, we bought the property largely because of the view, which is to the north and east. With Passive House construction, houses are oriented towards the south, with very few windows facing north. Passive Houses also tend to be small, but the reason for our house is to accommodate a crowd.

At this point, it is very much a work in progress — more reports as we move forward…

Written By:


As Deputy Director of DOER's Green Communities Division, Lisa helps lead a team devoted to working with Massachusetts cities and towns to realize environmental and cost benefits of municipal energy efficiency and renewable energy. Prior to joining DOER, Lisa worked in the Executive Office of Energy and Environmental Affairs from 2007 to 2012, first as Press Secretary and then as Assistant Secretary for Communications and Public Affairs. Her previous communications and public relations experience includes both government and the private sector, where, as principal of upWrite Communications, she served clients such as The Trustees of Reservations, The Nature Conservancy, and Partners Health Care/North Shore Medical Center. She began her career as a journalist, covering Beacon Hill for the State House News Service, and later wrote for a variety of other publications including The Boston Globe, Teacher Magazine, Animals Magazine, and The Gulf of Maine Times. The author of two books, Lisa serves on the board of the Saugus River Watershed Council and resides with her family in Melrose.

Recent Posts

Market-Based Program Designed to Continue Solar Growth posted on Jul 30

Market-Based Program Designed to Continue Solar Growth

This April, the Commonwealth launched its second Solar Carve- Out Program. Built on the success of the first solar carve-out program, SREC II is designed to continue to drive Massachusetts’ solar growth and particularly provide incentives for smaller solar projects, building mounted units, community shared solar, solar canopies, emergency power and low income housing.

“Mass. Military Division” and “Energy Efficiency” Go Together posted on Jul 25

“Mass. Military Division” and “Energy Efficiency” Go Together

Energy measures implemented at a Mass. Military Divison site include improved lighting, high efficiency motors, HVAC controls and energy management system upgrades. Under the Accelerate Efficiency Plan, the Commonwealth is investing over $12 million at 29 state facilities throughout the Berkshires.

Solar a “No-Go” on Your Roof? Share Through Community Solar posted on Jul 16

Solar a “No-Go” on Your Roof? Share Through Community Solar

Harvard residents who wanted solar on their homes and were unable to get it due to shading, sloping, or structural barriers, found a solution by sharing the Harvard Solar Garden, an approximately 250 kW project, provides 41 residents and six small businesses with sustainable, clean energy. .