Town Energy Committee
Minutes of meeting July 10, 2008
7:05 p.m. in kitchen of Town Offices
Members present: Diane Boilard, Aaron Harris, Dan Wolaver
Minutes of June 24, 2008 meeting: approved.
Diane and Dan met with Airkrete at the Town Offices building on June 28. Their estimate for insulating the Town Offices building is about $25,000 (see attached estimate).
Candi talked to the police and the fire department to see if they have objections to changing or discontinuing some of the street lights. The police department says they wouldn’t like to discontinue any street lights because of safety issues. The fire department needs the 11 kW light in front of their building to facilitate the arrival of volunteers at night. (But does it have to be on all the time?)
Dan met with Pinney Plumbing and Heating on July 10 to look at changes to heating and insulating the Town Offices building. They recommended a three-stage plan to insulate the building and make the heating more efficient (see attached report). Aaron will use his heat model to determine the cost savings of stages 1 and 2 (reducing heat loss and reducing water temperature in the boiler). Diane will get an estimate of cellulose blown-in insulation. Dan volunteered to put plastic sheeting over the old windows before the next heating season.
Deb is filling out the Cool Monadnock energy survey. Dan will follow up on this.
Aaron will email the results the Town Offices building temperature measurements to the committee members.
Candi has scheduled July 22 at 6:30 p.m. to visit the Peterborough library to see their wood-pellet heating system.
Aaron will schedule a trip to Crotched Mountain to see their heating system.
Dan will look into the cost of heat pumps (geothermal heating).
Diane will look into a design for a door to block the stairs going to the second floor of the Town Offices building.
Adjourned: 8:20 p.m.
Next meeting: July 24, 2008 at 7:00 p.m..
Submitted by
Dan H. Wolaver
Town of Greenfield
New Hampshire 03047
EcoSafe Insulation
Northfield, VT 05663
(802) 485-9119
Primary proposal for insulating the town building located at 7 Sawmill Rd.
Diane,
The figure we came up with for the insulating of the two main levels and the exposed areas of the basement (exterior exposure) is $23,334.75. This includes labor and the removal of the clapboards. Does not include sleeping arrangements or lift.
1. The first floor is spec’d at 11.5 ‘ tall X 220’ Perimeter X 8” depth
= 20,240 board feet $9,108.00
2. The second floor is identical to the first $9,108.00
3. The main basement wall is 68’ X 8.5’ X 10” plus a 28’ X 4’ X 10” wall and a 28’ X 4.5’ X 12” wall = 8,412 board feet. $3,795.00
lift: an additional $1,300.
sleeping arrangements: an additional $700.
Meeting with Pinney Plumbing & Heating
July 10, Town Offices building
Dan Wolaver
I met with Adrian Pinney (924-7588) for two hours at the Town Offices building for him to look at the heating/insulation situation in the building. (He worked on the original conversion of the building to Town offices and has blueprints of the building.)
He recommends that the insulation and window improvement be done before the conversion to wood-pellet heating for three reasons:
1. An over-sized boiler would be necessary to handle the excess heat loss if the insulation and windows are not improved. The larger boiler would be more expensive.
2. An over-sized boiler would be less efficient in the long run (when the insulation and windows are improved) at a lighter load.
3. He hates to see good fuel being thrown out the window (literally).
If the Town doesn’t have the money to both improve the insulation/windows and change to wood-pellet heating, he proposes a three-stage plan:
1. Reduce heat loss
a. Blow insulation into the walls.
b. Repair/replace the old windows. Repairing the windows would be a stop-gap measure—using calking, plastic sheets inside, and fixing broken glass.
2. Change the first-floor heating from steam to forced hot water.
a. The existing radiators can be used for hot water, but the piping would need to be replaced. Pumps would need to be installed. Running the boiler at a lower temperature will increase the efficiency.
b. A reset control consisting of a temperature sensor and a computer would optimize the boiler temperature for the outdoor temperature, increasing the efficiency further. The cost for stage 2 would be about $9000 (rough estimate).
3. Replace the oil boiler with a wood-pellet boiler.
Adrian recommends hiring a mechanical engineer to study the heat loss of the building and calculate fuel savings. He recommends Doug Waite of Design Day Mechanicals (878-4330) in New Ipswich.
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