Burnham BH, BV manual HOT Water Correction Factors, Hot Water Heating Capacity Conversion Factors

I.HOT WATER CORRECTION FACTORS

Table 11: Hot Water Heating Capacity Conversion Factors

	Entering Air					ENTERING AIR TEMPERATURE (°F)
	Temp. (°F)
		0	10	20		30	40		50		60			70	80	90		100
	100	0.769	0.683	0.599		0.518	0.439		0.361		0.286		0.212		0.140	0.069		0.000
	110	0.846	0.759	0.674		0.592	0.512		0.434		0.357		0.283		0.210	0.138		0.068
	120	0.923	0.835	0.749		0.666	0.585		0.506		0.429		0.353		0.279	0.207		0.137
	130	1.000	0.911	0.824		0.740	0.658		0.578		0.500		0.424		0.349	0.276		0.205
	140	1.077	0.987	0.899		0.814	0.731		0.651		0.571		0.494		0.419	0.345		0.273
	150	1.154	1.063	0.974		0.888	0.805		0.723		0.643		0.565		0.489	0.414		0.342
	160	1.231	1.139	1.049		0.962	0.878		0.795		0.714		0.636		0.559	0.483		0.410
	170	1.308	1.215	1.124		1.036	0.950		0.867		0.786		0.706		0.629	0.552		0.478
	180	1.385	1.291	1.199		1.110	1.024		0.940		0.857		0.777		0.699	0.621		0.547
	190	1.492	1.367	1.274		1.184	1.097		1.012		0.929		0.848		0.768	0.690		0.615
	200	1.539	1.443	1.349		1.258	1.170		1.084		1.000		0.918		0.838	0.759		0.684
	210	1.615	1.519	1.424		1.332	1.243		1.157		1.071		0.989		0.908	0.828		0.752
	220	1.962	1.594	1.499		1.406	1.312		1.229		1.143		1.060		0.978	0.897		0.820
	230	1.769	1.670	1.573		1.480	1.390		1.301		1.241		1.130		1.048	0.966		0.889
	240	1.846	1.746	1.649		1.554	1.463		1.373		1.286		1.201		1.118	1.035		0.957
	250	1.923	1.822	1.723		1.628	1.536		1.446		1.357		1.272		1.188	1.104		1.025
	260	2.000	1.898	1.798		1.702	1.609		1.518		1.429		1.342		1.257	1.173		1.094
	270	2.077	1.974	1.873		1.776	1.682		1.590		1.500		1.413		1.327	1.242		1.162
	280	2.154	2.050	1.948		1.850	1.755		1.663		1.571		1.483		1.397	1.311		1.230
	290	2.231	2.126	2.023		1.924	1.829		1.734		1.643		1.554		1.467	1.380		1.300
	300	2.308	2.202	2.098		1.998	1.902		1.807		1.714		1.625		1.537	1.449		1.367
Table 12: Correction Factors for Varying Water Temperature Drop*
	Water Temperature Drop, (°F)				5	10	15	20		25	30	35		40	45	50	55	60
	Btu Correction Factor				1.23	1.13	1.06	1.00		0.95	0.90	0.86		0.82	0.78	0.72	0.69	0.67
	GPM Correction Factor				4.64	2.21	1.40	1.00		0.76	0.61	0.50		0.42	0.36	0.30	0.26	0.23
	WPD Correction Factor				17.24	4.32	1.85	1.00		0.61	0.41	0.30		0.22	0.18	0.14	0.12	0.11

* Water temperature drop correction factors valid only for standard 200°F entering water and 60°F air temperature conditions.

Table 13: Ethylene Glycol Correction Factors**

Solution Temperature (°F)			ETHYLENE GLYCOL SOLUTION %
	20%	30%	40%	50%	60%	70%	80%
100	0.99	0.96	0.93	0.89	0.85	0.81	0.76
150	0.99	0.96	0.94	0.90	0.87	0.83	0.78
200	0.99	0.97	0.94	0.92	0.88	0.85	0.81
250	0.98	0.96	0.94	0.92	0.89	0.86	0.82

** For Propylene Glycol solution correction factor, multiply Ethylene Glycol correction factor by 0.95.

Table 14: Hot Water Unit Heater Mounting Height Correction Factors***

						ENTERING WATER TEMPERATURE, °F
	140	150	160	170	180	190	200	210	220	230	240	250	260	270	280	290	300
Correction	1.33	1.25	1.19	1.13	1.08	1.04	1.00	0.97	0.94	0.91	0.89	0.86	0.84	0.82	0.80	0.78	0.77
Factor

*** Factors are for use with entering air temperature ranging from 50°F to 70°F.

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