Hot water for domestic use : a complete guide to the methods of supplying and heating water for domestic purposes, giving each step to be taken and explaining why it is done . stnatural apparatus to select for the purpose is a spe- Special Gas Water Heaters. 81 cial gas water heater. Of course a heating coil orwaterback could be placed in the flame of an ordi-nary gas range, but so small a percentage of the heat would be utilized that suchO flpQ ^ method would prove >gC^ ^ii exceedingly expensive as ^ ^ -^ well as unsatisfactory. To fill just such require-ments gas water heaters,similar to
Hot water for domestic use : a complete guide to the methods of supplying and heating water for domestic purposes, giving each step to be taken and explaining why it is done . stnatural apparatus to select for the purpose is a spe- Special Gas Water Heaters. 81 cial gas water heater. Of course a heating coil orwaterback could be placed in the flame of an ordi-nary gas range, but so small a percentage of the heat would be utilized that suchO flpQ ^ method would prove >gC^ ^ii exceedingly expensive as ^ ^ -^ well as unsatisfactory. To fill just such require-ments gas water heaters,similar to that shown inFig. 17, were designed. Gasheaters of this descriptionare usually formed eitherwith a collection of droptubes, a spiral coil or a spe-cial hollow casting of ironthrough which the watercan flow, and absorb heatfrom the flame and hotgases applied to the outsideof the casting. Whatevermay be the interior con-struction of the waterheater, it is provided on theoutside with a casing toconfine the hot gases inclose proximity to the hol-low casting, so the waterwill have the benefit of all the available heat. Theheater shown in Fig. 17 is made of cast iron, and in. Fig. 17. Gas water heaterfor range boiler. 82 Hot Water for Domestic Use the illustration the outer casing is shown raised tothe top so as to expose the inner casting throughwhich the water flows. This casting is placed di-rectly above a gas burner so the bottom enlarge-ment of the casting will receive the direct heat fromthe flames while the hot gases pass over and aroundthe other enlargements, as indicated by the the casing is down in place the burner is notaccessible, consequently a pilot light proves con-venient for igniting the gas when the water is tobe heated. Naturally, on account of the greatamount of gas the heater would consume, it iskept in operation only when hot water is valve in the gas supply to the heater allows thesupply to be so regulated that once the water in thetank i
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Keywords: ., bookcentury1900, bookdecade1910, bookidhotwaterford, bookyear1910
