Model Designations

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 Items shown in gray are discontinued.

TYPE
(since 1988)
BOILER DESCRIPTION AVAILABLE ON PRODUCT LINES AVAILABLE SIZES
B Instantaneous Booster Water Heaters   DISCONTINUED 2006 Booster Heaters B-50, B-130, B-0195
H Hydronic Heating Boilers (Z21.13, H stamped)
H Residential Raytherm 0042-0180
H-NF Residential, Non Ferrous Waterways Raytherm 0042-0180
H1 Mechanical Modulation, 150-210F Raytherm 133-1826
H2 Motorized Modulation Raytherm 514-4001
H3 Two Stage Raytherm 181-4001
Hi Delta HD101-HD401
122-322   DISCONTINUED 2010
302-902
H4 On-Off Raytherm 181-4001
Hi Delta 302-402
ADB  DISCONTINUED 2009 500-1501
MVB 504-2004
H5 Mechanical Modulation, 110-170F Raytherm 182-400, 514-1826
H6 Motorized Modulating Hydronic Boiler W/B6000   DISCONTINUED 2009 Raytherm 514-4001
H7 Low NOx Stage-Fire   DISCONTINUED 2000 Raytherm 2100-4001
Electronic Modulation, 25-100% MVB 503-2003
XTherm 1005-2005
Electronic Modulation, 70-100% MVB 504-2004
Electronic Modulation, 20-100% XFyre 300-850  DISCONTINUED 2012
300A-850A
H8 Low NOx On-Off Fire  DISCONTINUED 2000 Raytherm 2100-4001
H8 Three Stage Hi Delta 992
H9 Four Stage Raytherm 514-4001
Hi Delta 1262-2342
N Instantaneous Water Heating Boiler (Z21.13, H stamped) with 110-170F Mechanical Modulation   DISCONTINUED 2009 Raytherm 514-1826
NH Instantaneous Water Heater (Z21.10.3, HLW stamped) with 110-170F Mechanical Modulation   DISCONTINUED 2009 Raytherm 514-1826
P Commercial Pool Heaters (Z21.56, HLW stamped) Raytherm 514-4001
Hi Delta 302-2342
MVB 504-2004
Xtherm 1005-2005
P8 Pool Heater, Low Nox   DISCONTINUED 2000 Raytherm 2100-4001
B-R Pool heater, Pro series, ASME-compliant 84 Pro 259A, 409A
C-R Pool heater, ASME-compliant pool 206A-407A
P-R Pool heater, residential pool 206A-407A
R Dual Temperature Water Heating Boiler with 150-210F Mechanical Modulation (Z21.13, H stamped)   DISCONTINUED 2009 Raytherm 514-1125
RH Dual Temperature Water Heater (Z21.10.3, HLW stamped) with 150-210F Mechanical Modulation   DISCONTINUED 2009 Raytherm 514-1125
RHP Pool Heat Pump Pool Heat Pump all
Spa-Pak Pool heater, electric resistance Spa-Pak 552, 1102
Pool heater, gas-fired   DISCONTINUED by 1987 Spa-Pak 33, 33GBI, 53, 53A, 53B, 151, 153
W Domestic Supply Water Heating Boilers (Z21.13, H stamped)
W1 On/Off Raytherm 133-4001
ADB DISCONTINUED 2009 500-1501
Hi Delta HD101-HD401
122-322  DISCONTINUED 2010
302-2342
W2 Mechanical Modulation Raytherm 133-1826
Motorized Modulation 2100-4001
W3 Two Stage Raytherm 182-4001
Hi Delta 122-322  DISCONTINUED 2009
302-902
W7 Low NOx Stage-Fire  DISCONTINUED 2000 Raytherm 2100-4001
W7 Electronic Modulation, 20-100% XFyre 300-850  DISCONTINUED 2012
W8 Low NOx On-Off   DISCONTINUED 2000 Raytherm 2100-4001
W8 Three Stage Hi Delta 992
W9 Four Stage Raytherm 514-4001
Hi Delta 1262-2342
WH Domestic Supply Water Heaters (Z21.10.3, HLW stamped)
WH1 On/Off Raytherm 133-4001
ADB   DISCONTINUED 2009 500-1501
Hi Delta HD101-HD401
122-322  DISCONTINUED 2010
302-2342
MVB 504-2004
WH2 Mechanical Modulation Raytherm 133-1826
Motorized Modulation 2100-4001
WH3 Two Stage Raytherm 181-4001
Hi Delta 122-322  DISCONTINUED 2010
HD101-HD401
302-902
WH7 Electronic Modulation MVB 503-2003
XTherm 1005-2005
Electronic Modulation, 20-100%   XFyre product line are Z21.10.3 certified, but are still H-stamped boilers. XFyre 300-850  DISCONTINUED 2012
300A-850A
WH8 Three Stage Hi Delta 992
WH9 Four Stage Raytherm 514-4001
Hi Delta 1262-2342
WHP Z21.10.3 water heater in pool service.  Used where outlet temp would exceed Z21.56 limits.  DISCONTINUED July 2012, SUPERSEDED by P units Raytherm 1287-4001
Hi Delta 2072-2342
MVB 2004
XTherm 1005-2005
WH Econopak Multipurpose Heaters Raytherm 0090-0401
Old Raytherm model suffixes (Used prior to Nov 1988.  All obsolete, superseded by current system)
TYPE BOILER DESCRIPTION AVAILABLE SIZES SUPERSEDED BY
-T standard heating boiler using mechanical valves, modulating, 120-240F. 489-4000 H1, H5, W2
-Ta heating boiler, using motorized modulating valves. 514-4001 H2
-Tb heating boiler, 2-stage. 182-4001 H3
-Tc heating boiler, on-off. 133-4001 H4
-Td standard heating boiler using mechanical valves, modulating over low-temp range. 202-1826 H5
-Tx heating boiler using B3A or B6000 control system. 514-4001 H6
-TP packaged center heating and indirect hot water supply boiler.  Same as -T boiler with addition of pump, non-Code Air-X Tank, T&P gauge, water pressure regulator and relay, factory mtd and wired. under 1060 --
-WHT hot water supply boiler.  AGA approved instantaneous water heater.  Not ASME certified. up to 361 --
-WT same as -WHT, with ASME heat exchanger.  Approved as hot water boiler. 489-4000 W1, WH1
-THWS hot water supply boiler. 90-210F modulation and 125# PRV. all H1, H2, H5
-TIP Instant-Pak.  Tankless instantaneous direct-fired hot water supply boiler packaged with bronze pump and controls.  T&P gauge std on sizes 489+. all --
-TIPR Restaurant-Pak.  -TIP unti with added 13 gallon accumulator.  Provides 140F/180F hot water supply.  Completely factory packaged with bronze pump, flow switch, thermometer, T&P relief valve and controls.  Mixing valve furnished loose for field installation all --
-WHG swimming pool heater. up to 361 P
-WG swimming pool boiler. all P, WHP