A treatise on architecture and building construction (1899)
International Correspondence Schools · Scranton, The Colliery engineer co. · leaf 383
son for this is that the wallsare usually too thin to permit the use of a proper-sized flue,or to permit it to be properly protected against loss of heat.In the arrangement shown, a layer of good non-conducting l86 HEATING AND VENTILATION 17 material 1 inch thick is interposed between the wall and… … Fig. 90. The best non-conductors for this purpose are either coarsewool or hair felt, or thin slabs of magnesia, sometimes calledmackitc. If these are too expensive, a good sound pineboard, free from knots or resinous spots, may be usedinstead. Paper will not afford sufficient resistance to…
Architecture · Building
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