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 |
