Heating Helper

CHAPTER 5INSTALLED RADIATION: DETERMINING HEAT LOADPipe SizeHeat Losses from Covered Pipe85% Magnesia TypeBTU per Linear Foot per Hour per °F TemperatureDifference (surrounding air assumed 75°F)Insulation,Thickness(inches)Maximum Temperature of Pipe Surface °F125 175 225 2751/2 1 .145 .150 .157 .1603/4 1 .165 .172 .177 .18011-1/41-1/222-1/233-1/245681 .190 .195 .200 .2031-1/2 .160 .165 .167 .1701 .220 .225 .232 .2371-1/2 .182 .187 .193 .1971 .240 .247 .255 .2601-1/2 .200 .205 .210 .2151 .282 .290 .297 .3031-1/2 .230 .235 .240 .2432 .197 .200 .205 .2101 .322 .330 .340 .3451-1/2 .260 .265 .270 .2752 .220 .225 .230 .2371 .375 .385 .395 .4051-1/2 .300 .305 .312 .3202 .253 .257 .263 .2701 .419 .430 .440 .4501-1/2 .332 .339 .345 .3522 .280 .285 .290 .2951 .460 .470 .480 .4921-1/2 .362 .370 .379 .3852 .303 .308 .315 .3201 .545 .560 .572 .5851-1/2 .423 .435 .442 .4502 .355 .360 .367 .3751 .630 .645 .662 .6801-1/2 .487 .500 .510 .5202 .405 .415 .420 .4301 .790 .812 .835 .8501-1/2 .603 .620 .635 .6452 .495 .507 .517 .52773