A rural cottage sits on pilings with a breezeway underneath. It has insulated wooden walls (A walls

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A rural cottage sits on pilings with a breezeway underneath. It has insulated wooden walls (Awalls = 50 m2,Rwalls = 3 m2 K/W), a plywood floor (Afloor = 35 m2)2.5 cm thick, and a simple peaked slate roof (slope 30) covering the floor area. The slates are roughly 2 cm thick, laid over plywood sheathing 2.5 cm thick. The cottage has four double pane glazed windows (1/4 "air gap), each 1 m2. Estimate the effective R value for the dwelling as a whole. Now imagine doubling the thermal resistance of any component, walls, floor, or roof. Recompute the effective R-value and decide which would be most effective for energy conservation.

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The Physics of Energy

ISBN: 978-1107016651

1st edition

Authors: Robert L. Jaffe, Washington Taylor

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