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Neotherm Commercial Hydronic Boilers

Model Number	Input BTU/h	Input kW	Output BTU/h	Output kW	AFUE %	Thermal Efficiency%	Combustion Efficiency%	Water Connections NPT Size (in.)	Gas Connections NPT Size (in.)	Width (in.)	Length (in.)	Height (in.)	Air Inlet (in.)	Vent (in.)
NTH285	285,000	83.5	269,040	78.8	95.0	N/A	94.4	3/4 NPT	1-1/4 NPT	19	26-3/4	38-1/4	4-1/2	4-1/2
NTH399	399,000	116.9	382,242	112.0	N/A	94.0	95.6	3/4 NPT	1-1/4 NPT	19	31-1/2	38-1/4	4-1/2	4-1/2
NTH500	500,000	146.5	472,500	138.4	N/A	95.0	95.0	1 NPT	1-1/2 NPT	19	37-3/4	38-1/4	4-1/2	4-1/2
NTH600	600,000	175.8	570,000	167.0	N/A	95.0	N/A	1 NPT	2 NPT	25	37-3/4	36	4-1/2	6-1/2
NTH750	750,000	219.8	713,000	208.9	N/A	95.0	N/A	1-1/2 NPT	2 NPT	25	55-1/4	36	4-1/2	6-1/2
NTH850	850,000	249.1	808,000	236.7	N/A	95.0	N/A	1-1/2 NPT	2 NPT	25	55-1/4	36	4-1/2	6-1/2