| Access door | 124 |
| Adjustable frequency drive | 126 |
| Air cleaner | 83 |
| Air compressor | 37 |
| Air conditioning unit - computer room | 73 |
| Air conditioning unit - package | 68 |
| Air conditioning unit - split | 150 |
| Air conditioning unit - split ductless | 95 |
| Air conditioning unit - VFR | 182 |
| Air conditioning unit - wall | 151 |
| Air cooled condenser | 71 |
| Air cooled condensing unit | 72 |
| Air dryer & filtration | 38 |
| Air filter | 81 |
| Air filter bank | 82 |
| Air flow measuring station | 84 |
| Air handler | 15 |
| Air handler - custom | 174 |
| Air handler - semi-custom | 175 |
| Air receiver | 62 |
| Air separator | 14 |
| Backflow preventer | 112 |
| Bath tub | 106 |
| Blowdown separator | 153 |
| Blower | 39 |
| Boiler - cast iron | 173 |
| Boiler - copper fin | 155 |
| Boiler - fire tube | 1 |
| Boiler - water tube | 154 |
| Boiler feed system | 152 |
| Breeching and stack | 133 |
| Carbon monoxide monitoring system | 91 |
| Chemical feeder | 49 |
| Chemical treatment system | 50 |
| Chiller | 66 |
| Cleanout | 107 |
| Coil | 18 |
| Controls and devices | 85 |
| Convector - electric | 31 |
| Convector - hydronic | 139 |
| Cooling tower | 67 |
| Damper | 96 |
| Damper - fire | 26 |
| Damper - fire and smoke | 27 |
| Deaerator | 54 |
| Dehumidifier | 157 |
| Deionizer | 52 |
| Dielectric insulating fitting | 142 |
| Drain | 108 |
| Drinking fountain | 104 |
| Drinking fountain - electric | 105 |
| Duct - grease | 169 |
| Duct and accessories | 114 |
| Duct Heater | 176 |
| Dust collector | 92 |
| Electric heater | 116 |
| Emergency shower and eyewash | 103 |
| Evaporative condenser | 115 |
| Evaporative cooling systems | 79 |
| Exhaust system - vehicle | 88 |
| Exhaust system - welding | 90 |
| Expansion joint | 57 |
| Fan - air curtain | 129 |
| Fan - ceiling / roof / wall / inline | 20 |
| Fan - centrifugal | 21 |
| Fan - FRP | 117 |
| Fan - paddle | 19 |
| Fan - vehicle and welding exhaust | 22 |
| Fan coil unit | 16 |
| Faucet | 162 |
| Filtration / separators | 181 |
| Finned tube radiation | 30 |
| Flexible connection | 58 |
| Furnace | 77 |
| Gas detection device | 166 |
| Grease interceptor / trap | 109 |
| Grille and register | 24 |
| Heat exchanger | 40 |
| Heat pump | 69 |
| Heat pump - water source | 70 |
| Heat trace tape | 42 |
| Heating and ventilating unit | 120 |
| Hood - chemical | 76 |
| Hood - fume | 141 |
| Hood - kiln | 89 |
| Hood - kitchen | 75 |
| Hood - roof | 74 |
| Hose bib | 110 |
| Humidifier | 53 |
| Hydrant | 137 |
| Ice / thermal storage equipment | 17 |
| Infra-red heater - electric | 64 |
| Infra-red heater - gas | 32 |
| Lavatory | 102 |
| Leak detection system | 161 |
| Louver | 25 |
| Louvered penthouse | 134 |
| Make-up air unit | 78 |
| Mechanical identification | 135 |
| No-hub pipe couplings | 177 |
| Non-chemical water treatment | 180 |
| Package sewage lift station | 97 |
| Pipe - double containment | 48 |
| Pipe - prefabricated insulated underground | 47 |
| Pipe and pipe fittings - hydronic | 136 |
| Pipe and pipe fittings - plumbing | 121 |
| Pipe insulation | 63 |
| Pipe supports | 123 |
| Plenum | 128 |
| Plumbing supplies and accessories | 165 |
| Pressure guage | 144 |
| Pump - booster | 8 |
| Pump - centrifugal | 7 |
| Pump - chemical | 118 |
| Pump - condensate | 46 |
| Pump - fire | 12 |
| Pump - foam | 178 |
| Pump - high pressure | 172 |
| Pump - inline | 2 |
| Pump - jockey | 13 |
| Pump - prepackaged fire | 179 |
| Pump - sewage | 10 |
| Pump - submersible | 132 |
| Pump - sump | 11 |
| Pump - vertical non-clog | 131 |
| Pump - vertical turbine | 9 |
| Radiant floor system / snow melt system | 59 |
| Radiant heater | 80 |
| Radiator | 36 |
| Refrigerant monitoring system | 94 |
| Reverse osmosis system | 93 |
| Roof curb | 125 |
| Scrubber - air | 158 |
| Scrubber - fume | 159 |
| Scrubber - packed tower | 160 |
| Service sink | 163 |
| Shock absorber | 147 |
| Shower | 101 |
| Sink | 100 |
| Solar heating system | 60 |
| Sound attenuator | 65 |
| Sound trap | 28 |
| Stack economizer | 156 |
| Strainer | 145 |
| Tank - day | 61 |
| Tank - expansion | 3 |
| Tank - fuel storage | 4 |
| Tank - hot water storage | 6 |
| Tank - hydropneumatic | 5 |
| Tank - surge | 122 |
| Thermometer | 143 |
| Trap primer | 111 |
| Unit heater - electric | 34 |
| Unit heater - gas | 33 |
| Unit heater - hot water | 35 |
| Unit ventilator | 29 |
| Urinal | 99 |
| Vacuum pump | 55 |
| Valve - seismic | 140 |
| Valve - themostatic mixing | 148 |
| Valves and specialties (HVAC/R) | 44 |
| Valves and specialties (plumbing) | 43 |
| Variable air volume mixing box | 86 |
| Variable frequency drive | 41 |
| Vibration isolation | 56 |
| Water closet | 98 |
| Water filtration | 170 |
| Water hammer arrestor | 138 |
| Water heater | 45 |
| Water jetting/blasting systems | 171 |
| Water softener | 51 |