Is this correct

i use 800 W as an easy number.

it is really 746W=1 HP. and 3.2 kw = 100k btu'S.

3'413 Btu =1KW actually

2500 BTU/hr = 1HP buh 2546Btu/h =1Hp =.746 KW

i use 25 cu.' for a rough guess on cement. it is actually 27'.

Boiler HP 33,475 BTUper hour output. 98,106K out put.

its like 40.2 megs

From the Book \"Heating Design and Practice\"

Boiler Horsepower: One boiler horsepower is developed by the evaporation of 34.5 pounds of water at 212°F to steam at 212°F. This is equal to a heat input of 34.5 * 970.3 Btu per pound, or 33,475 Btu per hour.

Continuing:

"Since steam boilers invariably operate at steam and water temperatures quite different from 212°F, we must determine the horsepower of a given boiler for the conditions under which it is operating by comparing its rate of evaporation with the standard.

For example, suppose that we have a heating boiler that is producing steam at 14 pounds per square inch gauge pressure from feed water having a temperature of 140°F. Referring to Table 1.1, which contains the properties of steam, we observe that the total heat in each pound of this steam is 1163.3 Btu, approximately, by interpolation.

Of this total heat, 140F - 32F, or 108 Btu, already is present in the feed water; consequently, the boiler is called upon to provide 1163.3 - 108, or 1055.3 Btu, for each pound of steam

Since standard conditions for horsepower stipulate only 970.3 Btu per pound to be added by the boiler, in the case assumed the boiler must invest 155.3/970.3, or 1.09 Btu, for each Btu contemplated under the standard. In practical applications, this means that a boiler rated at 50 horsepower by the manufacturer will deliver on 50/1.09, or approximately 46 horsepower, under the conditions of 14 pounds per square inch gauge pressure and 140°F feed water."