Resources/DWG symbol libraries

Free refrigeration and mechanical room layout blocks for AutoCAD (DWG): compressor racks, condensers, cold rooms, boilers, pumps, heat pumps

Refrigeration and mechanical room symbols: 255 ready-made AutoCAD blocks (DWG), free to download and use in your own projects, as a ZIP or one symbol at a time.

255 plan blocks for refrigeration plant, cold rooms and mechanical rooms at real size in millimetres: compressors and racks (reciprocating, semi-hermetic, scroll, screw and CO2 compressors, racks of 2 to 8 compressors, CO2 booster and two-circuit racks, condensing units, oil separators, receivers, accumulators, economiser, intercooler, surge drum, recirculation vessel and pumps, purger, VFD cabinet); heat rejection (air-cooled and V-type condensers of 1 to 12 fans, CO2 gas coolers, adiabatic coolers, evaporative condensers, fluid coolers, dry coolers, cooling tower cells); evaporators and cold rooms (unit coolers, industrial air coolers, blast freezer tunnel, spiral and plate freezers, cold rooms from 3 x 3 m to 10 x 12 m, freezer rooms, anteroom, doors, dock door, pallets, racking bays, ice machine and ice storage); display cabinets and cold equipment (multideck, glass door, island, chest and service cabinets, bottle cooler, ice cream freezer, undercounter units, vending machine); mechanical room plant (boilers of all kinds, burner, flue, deaerator, tanks, softener, cylinders, buffer tanks, calorifier, expansion vessels, heat exchangers, headers, MCC and control panels); pumps and distribution (inline, twin and base-mounted pumps, pump sets, booster set, manifolds, valve and reducing stations, pipe rack, anchors, sleeves); heat pumps and renewables (air-source heat pumps from 8 to 120 kW, ground-source units, boreholes and borehole fields, ground loops, solar collectors, CHP units, pellet storage, fuel tanks, district heating substation); machinery room safety (ammonia, CO2, refrigerant and oxygen detectors, emergency extract fans, diffusion tank, relief stack, emergency stop, breathing apparatus, eyewash, alarms, doors); and space and markers (service, tube pull, coil pull and door swing clearances, drains, trench, bund, plinth, monorail, ladder, stair, platform, pipe markers, room, equipment and load tags). For the air side, ducts and air terminals see the HVAC symbol library.

Version 1.0 · updated October 17, 2026

Using AutoCAD 2017 or an earlier version? Download the 2010 format

Free to use and modify in your own projects, including commercial ones. The ZIP holds one plain DWG file in AutoCAD 2018 format and a README; no add-in needed. Provided as is, without warranty.

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All 255 symbols

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