8/7/2007 PLANNING AND CONSTRUCTION COMMITTEE Minutes

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ti Summary of Green Four on Jud f 2007 . I•attended-a Oren Torr of two libraries - ; - -{ .� : . •. at the Mn station• f Arne Larsen, it k . Consultant,for the Massachusetts Board ofLibrar ' ' �orrsonei-s. Anne is the state's expert on green buildings. Th ,tour began at the Wendell Public co' n'and concluded at . the.I orth Adams f ublio Library. This i a summary o f th . . y presentation , -. The vend ll-Public Library is 4500 - k square feet of new construction' b"It on the.. foundation of a previos tori buId' in . They had hoped to add on to,the eistin _ builder but a freak�torad - g + last unul r destroyed b iidin .- It was�buil - the h�stor� bilzn 'bu g t-t �look 1�e t has been built to n�odrn sp �fications, �' lib hotoolta�c + - ' � . - - nary.has. � .. p panels on the roof and the walls and ceilin bae been heave l * sulat ed.- T .e walls have•an factor of 29.4 and the roof has ' ars factor ' . --The ails av6- blown-m cellulose'i�ul tion rid the roofh s.Ic r .. yn ay foam insulation. The slab has one inch o f contih o s u d rsl b.;insulation and cont` . • • uous two Leh thick rigid ' r found errnte anon intlatiou. Thi skylights had ars] factor f 2.5.' The glass was-in the windows was also. m y efficient. Ther was no.structural • + . . t ral therrr�al because . they used insulat'ivre panel sheathing, Ma o f the s Baker - .y - . -stressed the,value of prop insulating and building tight er�velo ddir� rn in�i� r Ing msulatior will result m a=- . more comfortable.building and ill feduee unlit cot . : • there ire threes l� hislarge . . . . . . ., ... , . l y . .nd a bank of window' s_ s at one end.ofthe-hhrx- �.here . -it was the.vest side f the building), �well as I ` .. f.. , . - ere t wmd rs.that - fsh�air vt�l � - - - . ' - ' .- _ open� .al�o �r� - - . - . .n ,.; . tion.. Tli �e•has begin q great emphasis-on daylight M .• the library; as . you can unagine,from the description of the end ."Thi Li Ieidkaa to l - I p,-opted- Dave the light hile tie-s eskers sere ` the1r . {.. preetxtatio� . �-It was l 'cor�r�f` rt . �- _� . _. . ' .:. ' �. • y le i h ut the eights n and trons wool able to read with,put them'n on a - _d be sir day, 1 phis. roul d sageenergyand e bui*ldir cooler. �Th different the .. rooms m the library had occupancy sensor-switch es IS ell Mulpple s itc4ffig levels for'�ghtlixture' s-,The Director demonstrat6d how she could.turn.on small,groups of sped o lights.only in areas _ . g .. where they mere.needed.. Window shad and building o er4a.ngs.let her control h h _ g t d heat through the windows.at,peak tiny , f sun exposure. The photovoltaic roof arra was. .8 K W ' hu ld ng had only been opened- -,short time but vas using.minimml amounts of le tric t from th y gid and had receiv6d ed a c p� . f n rg r,bill that were jest t base charge h cau . .. re they hadn't used y electricity from the gd.. they have not yet, one.throw g a--winter 1n the buI6lding so it is not yet knowhowmuch power.the panels ilkgenerate during'-the'shorter winter clays. I was.surprised Wendell opted not to instal ' ' ; i r _ . l:a1r endtloning, .They were.coo�ngthe - building with.c.e�f xg f.hs � the fresh air - - , • �� n through the clerestory windows. They used Demand Controlled Ventilation with carbon di oxide sensor controls and Econower 're-fooling at night �d free Coolin for ro date libraryt�eratu�r'es. The i only open twenty hours per eek and the climate 'tends t be cooler.tar�our area. Most homes W ndell dd riot use ah- ning so Heidka np felt it was