Document nNyvExjR38g7XraYQG9qj1OE1

HEATING VENTILATING AIR CONDITIONING GUIDE 1944 Design Procedure The steps to be taken in designing a gravity warm air duct system are: 1. Calculate the heat loss from each room as explained in Chapters 4, 5 and 6. 2. Prepare a layout showing (a) furnace, (b) chimney connection, (c) warm air registers (whether floor, base board or wall), (d) return air grilles. 3. Indicate on each warm air run (using symbols shown in Fig. 4). (a) whether the room to be heated is on the first or second story, (b) the approximate length of leader Notes: TrV cMme 84 5fcenCt S)*' Fig. 3. Return Air Combinations3 duct a"d and transition type C. A shoe. pipe in the basement, (c) the number of right angle elbows required, including the elbow at the boot connection. (Consider each 45 deg elbow as equal to of 90 deg elbow, consider the two sharp 90 deg elbows in a cross-over connection as equivalent to three 90 deg elbows), (d) whether the register is to be located in the floor, in the baseboard, or in the wall. 4. Show the number, and proposed locations of return air grilles and the type of return air system (see Fig. 3). 5. From Table 6, for first story, or from Table 7 for second story, select the unit number for the warm air system which will supply the heat required to each room, with the number of elbows and length of leader pipe previously determined. Then, using the unit number as found, read directly in Tables 2, 3, or 4 the leader, stack, and register sizes required. 6. From Table 8 select the unit number for the return air system to correspond with 364 T a b le 6. W ar m A ir Ca r r y in g C a p a c it y , B t u D e l iv e r e d , F irst Story R egisters3'130' Length of Leader Pipe--in Feet No OF E lbow s CHAPTER 19. GRAVITY WARM AIR FURNACE SYSTEMS H ft ooooo CMCO^COCO CO b- *D tO ooooo CO 05 0* ft *o h o* too* --I ooooo CO 0 0 to to OHCOON ooooo 05 --1 b W --1 00 05 0 CO CO ooooo CO tO CO b* T*4 b- b. ooco <35 cq 4*4 tO sO 05 CM ^4 *0 O 05 o* T*4 to CO 00 -- CO CO 00 pH iH CO *4*4 to00 pH ftH OOOOO 05 00-4*0 0 ooooo TJ4000 00 10 ooooo 050*000 ooooo T}4 r-1 pH to to 0000 *-H *434 0 CD b ^<00050 CO tOb- to CO -h CO tO CO CM O ft CO 05 b- 05 05 i-H CO CO <N MMONOCO *4 *0005 0* t#T*0c0 05C* t*4 to CO 00 --1 CCTJ4COOO--1 ftH OOOOO 005 b-0*0 ooooo HO ^ too* ooooo to 0 0 *o co ooooo 05 0 to 05 0 ooooo toco co 050 000 0*00*0 lObOOH CO to 00 CO CO --1 co *o b* (N 0 --4 CO 05 00 4*4 ONOrt Tj4*Ob-05CO ^4 *o co 05 b* Tj4*ocoo5b* *^4 to CD 00 --4 CoO oorf ooo*o go --i *r>b-o ooooo b--4 05 0*0 CO 05 0* CO CO ooooo H 0 4f O CO U5NOOH ooooo lOOOOCOtO CO to b- CO co ooooo O CM O* CO b* co to co b* o4*4 O b ^ t*4 to r- o co TJ4 tOb-OCO ^ toco 05 b* *4*4 toco 05b* pH --4 --1 pH pH ooooo ooooo ooooo OOOOO ooooo CM ' GO tD o CO 00 o *o rf --< tO 05 CO OOHU5COO NOOtflO CO 05 CM CO co 05 bib- toco 0 05 --1 o 0 0 ^ to CO to 00 co CO 5tONHTji ^ CD b- O Tf Tj4 lOb- 0 CO *4*4 to b- 05 CO t*4 to CO 05 b* ftH ooooo b o o 1-HiCO^O OOOOO OCMOCDiO o CO CO o *o ooooo CO --4 CO 0 to co--'tor- oCtoO o0005 obCO* oc--o1otTo*4 ooooo 0MN05 to CO O 05 O --<to O 00 *o . tocbr^ --4 H Tf Tfl CO t- T*4 --4 pH *4*4 tor^oco --4 --4 4*4 to b-05 CO pH ftb .ooooo TJ4 CO CO to ooooo co e* co co tji o05 o--< ocoo*oo--< ooooo 0000*0 05 ooooo 4*4 00 cO O b* CO b-CO 00*0 HtOO^O 05 CO b 0 to 000*0 0 05 CO GO b* CO to --to CO 00 to to CO 00 ft to T*4 CO b- t*4 **CObOW T*4*ObOCO pH -H l"H pH ftb ooooo pH b^O ^H T*4 to 05 0 0*0 ococoo ocm oooo CO b- CO 00 to ooooo ^lOHCOOb ft too 05 oco ob- o-4*4 o0oC* 05b*b-05T*4 ooooo 05 co 05 <N to r-- 0 ^*4 co 05 to O CO 0* o --1 *-H to cb co ft *o to CO CO ft *4*4 O b-O TH ^4COb-OCO ooooo ooooo ooooo ooooo ooooo <b 00 00 b- 05 CO 05 -51 00 b- 05 W -4 00 to -^4 r-HOOOCQGO 4*4 to b* to 00 ft o I-- 00 to to t*4 05 *0--4 05 CO b-bl b- --1 *^4 05 CO GO O5b*bC5C0 CO *6 b- ooo* o to co 00 b* to to CO 00 --4 to toot-T--1 ^ 4*4 CO b 0 ^ rH pH ooooo ooooo ooooo ooooo ooooo b *00-4*4 b-CM co *o -4*4 to co co O O cOOOb-b* 04*4 10 050 ft 00^--1050 CO --* OO tO T#4 4}4 05*0--<0 CM CO CM CO CO 044*4 05 0*00 co D b- 05 CM b tOb-COCMcO to co oob* *o toco 00 -H to tOCDb-H^ pH --4 ooooo ooooo ooooo ooooo ooooo b 0*0*0*0 0* to CO 05 ft ^4 b*b*oo*oco CMCOCOi-Hb- 4*4 CO 00 --4 ID ft OOTjtCOtO 00 co 0 05 05 co--b.T4co ^CO^Ob b*co--icoc* V CO b- 05 CO b- to b- 05 C* CO tobCodbfco tO CO 00 CM-tO iDCOOO^Htb pH --4 . ^ c* CO T*4 to 6 Z b ^h o* CO to r-i CM CO ^ to --I C*CO T}4 to -- b* CO -4*4 to --1 b* CO -4*4 to z D 365 Table 6 applies to baseboard and floor locations of warm air registers. ^Consider each 45 deg elbow as equal to one-half of a 00 deg elbow. Consider each 90 deg offset between boot and stackhead equal to one 90 deg round elbow.`