National boilers, radiators, and specialties: catalog no26 . ndirect radiation is to be used, not less than 75 percent, increase over direct radiation should be figured in deter-mining the size of boiler required. In rating steam boilers as above, it is understood that anaverage pressure of 2 pounds will be maintained at the rating water boilers as above, it is understood that the meantemperature of the water at the boiler will be 180 degreesFahrenheit. Guarantee These boilers are guaranteed only to the extent of furnishingnew castings for any found defective in manufacture. They are
National boilers, radiators, and specialties: catalog no26 . ndirect radiation is to be used, not less than 75 percent, increase over direct radiation should be figured in deter-mining the size of boiler required. In rating steam boilers as above, it is understood that anaverage pressure of 2 pounds will be maintained at the rating water boilers as above, it is understood that the meantemperature of the water at the boiler will be 180 degreesFahrenheit. Guarantee These boilers are guaranteed only to the extent of furnishingnew castings for any found defective in manufacture. They areconservatively rated according to the accepted standards, buton account of the varying conditions surrounding their installa-tion, we do not guarantee our boilers except as above. Recommendation Both on account of increased efficiency and in the interest ofgreater economy, we strongly recommend that all boilers bethoroughly protected by a substantial covering of asbestos. 33 NATIONAL PREMO RADIATORS Single-Column Hot-Water and Steam Types WIDTH OF RADIATOR. « * WIDTHOFFE ET
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Keywords: ., bookcentury1900, bookdecade1920, booksubjectsteambo, bookyear1920
