SEATTLE BOILER TANK HEATER RECOVERY TABLE

Temp Rise		Recovery in Gallons Per Hour (GPH) per Sq. Ft. of Heating Surface
		Heat With Hot Water*		Heat With Steam Steam Pressure in Lbs. per Sq. Inch
Inlet	Outlet	180°F	210°F	0 psi	2 psi	5 psi	10 psi	15 psi	20 psi	30 psi	40 psi	50 psi	75 psi	100 psi
40	80 100 120 140 160 180	38 23 15 10 6 -	63 39 26 19 14 10	72 44 31 22 16 11	77 48 33 24 17 13	83 52 36 26 19 14	91 57 40 29 22 17	98 62 43 32 25 19	104 66 46 34 26 21	116 73 52 39 30 24	126 80 57 43 33 27	133 86 60 46 36 29	151 97 69 53 42 34	166 106 77 58 46 38
50	80 100 120 140 160 180	48 26 16 11 7 -	81 45 29 20 14 10	93 52 34 24 17 12	99 55 36 26 18 13	107 60 40 28 21 15	118 66 44 32 23 18	128 72 48 35 26 20	136 77 52 37 28 22	151 86 58 42 32 25	164 94 63 46 36 28	174 100 68 50 38 30	198 114 78 57 45 35	217 125 88 64 50 40
60	80 100 120 140 160 180	65 31 18 11 7 -	112 54 33 22 15 10	135 63 38 26 18 12	145 67 41 28 20 14	156 73 45 31 22 16	172 81 50 35 25 18	187 88 55 38 28 21	198 94 59 41 30 23	221 106 66 46 35 26	241 115 72 51 38 30	256 122 77 55 41 32	291 139 89 63 48 38	320 154 98 70 54 42
70	100 120 140 160 180	39 20 12 7 -	69 38 24 16 11	80 44 28 19 13	86 47 31 21 14	94 52 34 23 17	104 58 38 27 19	114 64 42 30 22	122 68 45 32 24	137 77 52 37 28	149 85 57 41 31	159 91 61 45 34	182 104 71 52 40	201 116 79 58 45
80	100 120 140 160 180	52 24 13 7 -	85 45 27 17 11	118 53 31 20 13	125 57 34 23 15	136 63 38 25 17	152 71 43 29 21	166 77 48 33 23	177 83 51 35 28	200 94 59 41 30	219 103 65 45 34	233 111 70 49 37	268 128 81 57 43	296 142 90 64 49
90	120 140 160 180	30 15 8 -	57 30 19 12	68 36 22 14	73 40 25 16	81 44 28 19	91 50 32 22	100 55 36 25	108 60 39 28	122 69 45 32	134 76 51 36	144 82 55 40	167 95 64 47	185 106 72 53
100	120 140 160 180	39 17 8 -	78 36 20 12	97 43 25 15	105 47 28 17	115 53 31 20	132 50 36 24	145 67 41 27	156 72 44 30	178 83 51 35	196 92 57 40	211 99 62 43	244 116 73 52	272 130 82 58

*Based on 20°F temperature drop. To Use This Table: Locate desired temperature rise in left hand column. Locate column with appropriate heating medium. Divide the total GPH req'mt by the recovery of 1 ft2. Select a coil with adequate heating surface.

Notes: Recovery rates include a .001 fouling factor. Recovery rates based on 3/4" x .042" copper tubing. Insure adequate condensate drainage for steam  coils.