Not only are there no hot-air registers, return air vents, or radiators, cast iron or other, or cooling systems—condenser, reheat coils, heating convector, damper, concentrator, dilute solution, heat exchanger, absorber, evaporator, solution pump, evaporator recirculating pump—or any type of ducts, whether spiral lock-seam/standing rib design, double-wall duct, and Lolossᵀᴹ Tee, flat oval, or round duct with perforated inner liner, insulation, and outer shell; no HVAC system at all, even a crude air distribution system—there are no windows—no water supplies, drains, bathtubs, urinals, sinks, drinking fountains, water heaters, or coolers, expansion tanks, pressure relief valves, flow control, branch vent, downsprout, soil stacks, or waste stacks, or fire protection equipment: smoke detectors, sprinklers, flow detectors, dry pipe valve, O.S. & Y. Gate valve, water motor alarm, visual annunciation devices, hose rack and hose reel whether a 2 ₁/₂" or 1 ₁/₂" valve, foam systems, gaseous suppression systems; nor any sign of daisy-chain wiring or star wiring or electrical metallic tubing (EMT), rigid conduit, wireways, bus ducts, underfloor ducts, a cellular floor, a raised floor, or for that matter wire of any sort, No. 36 to No. 0000 (#4/0), or electrical boxes—3 duct junction boxes etc., etc.—or plug-in receptacles, 3-prong grounded duplex or other, pots or pans or cans, or switch plates, switches, whether swing pole, dimmer or remote, or circuit breakers or fuses, whether lead, tin, copper, silver, etc., etc., with a voltage class from 12, 24, 125, 250, 600, 5000+, or even lights, whether electrical discharge, incandescent, or combustion, no flame arc or gas-filled, tipless, inside frosted, decorative, general service, 10,000 watt aviation, picture studio, projection, signal, Christmas tree, arc projector, photoflood, mercury, sodium, glow, sun, flash, black light, water cooled, germicidal, purple x, ozone, fluorescent, Slimline, Lumiline, Circline, rough service, Q coated, Bonus A-line, 75,000 watt, Quartzline, special service, DVY, DFC, iodine cycle, axial quartz, halogen cycle, bi-post, heat, brooder, red bowl therapy, silver neck brooder, quartz infrared, bent-end infrared, iodine cycle infrared, RSC base, red filter, Marc 300, Lucalox, multi-vapor, e-bulb mercury, 1,500 watt multi-vapor, Watt-Miser II, Magicube, Flash Bar, Flip-Flash, GE-500, composite, discharge forward lighting, Precise, 35.5 lumens, white Lucalox, standby Lucalox, high output Lucalox, Halarc 32 watt, Halarc 100 watt, Staybright XL, high intensity Biax, metal halide, to say nothing of communication systems such as public address, intercom, radio, TV, CCTV, SATV, VSAT, telephone (PAX or PBX etc., etc.) or data, signal multimedia designs, or BAS, BMS, BMAS automation; there are not even any moldings or other stylistic signatures such as casings, baseboards, or finished floors, linoleum, cement, whether fast setting, coloured, fiber reinforced, self-leveling, mortar, high early-strength, sand mix, silica sand, plastic, hydraulic, or sheet vinyl, tile, cork tile, terrazo, rubber, carpeting, epoxy, ceramic & stone, slate, aputitsiarvq, or marble, whether white—Danby Imperial, Colorado Yule, or Carrara—or black or green; or hardwood, whether overlay, strip flooring with alternate joints, or herringbone, inlaid, basket weave, Arenberg, Chantilly, or Versailles parquet; in fact no wood anywhere, whether redwood, treated western hemlock, yellow pine, cedar, wood-polymer, Engelmann spruce, pecan, southern magnolia, Colorado spruce, alpine fir, american beech, northern red oak, Canada Hemlock, red maple, sugar maple, eastern white pine, butternut hickory, shagbark hickory, american plane tree, eastern black walnut, ponderosa pine, white fir, northern catalpa, common bald cypress, american sweet gum, bur oak, California live oak, mahogany, Douglas fir, eastern cottonwood; nor any sign of a sub-floor, sheathing, drywall, any kind of insulation material, polyicynene, or other; sills, sill plates, sill sealer, rebar, anchor bolts, let alone footings or foundation walls; or bricks, whether split paver or red bullnose, or wall studs, firestopping, or braces, nor evidence of floor joists, end joists, or ledgers, bridgings, girders, double plate, gable studs, ceiling joists, rafters, king posts, struts, side posts, ridge beams, collar ties, gussets, furring strips, or bed molding (at least the stairs offer some details: risers, treads, two large newel posts, one at the top and one at the bottom, capped and connected with a single curved banister supported by countless balusters) though among other things no wallpaper, veneer plaster, Baldwin locks, any sign of glass, whether clear, reflective, insulated, heat-resistant, switchable, tinted, bad-guy, antique; or even tin-plated steel, factory-painted steel, brass; or even a single nail or screw, whether sheet-metal, particleboard, drywall, concrete, drive, aluminum, silicon bronze, solid brass, mechanically galvanized, yellow-zinc plated, stainless steel, epoxy coated, black finish, Durocoat; to say nothing of the sheer absence of anything that might suggest a roof, whether pitched, gable, hip, lean-to, flat, sawtooth, monitor, ogee, bell, dome, helm, sloped, hip-and-valley, conical, pavilion, rotunda, imperial, or mansard; no westwork, siggurat, brise-soleil, trompe l' oeil etc., fenestration, tierceron rib, coffering, tholos, strapwork, stoa, egg-and-tongue, sala terrena, absidiole, rotunda, revetments, reredos, flying buttresses, retablo, herm, belvedere, pavillon, pastas, narthex, lunettes, dormers, cottage orné, pendentives, cheek-walls, cavetto, abutment, nor vaulted chambers, whether quadripartite or lierne vaults, or Mihrab domes, turrets, minarets, minbars, porticoes, peristyles, tablinums, compluviums, impluviums, atriums, alas, excedras, androns, fauces, posticums, peristylums, vestibules, arcades, apses, naves, naos, pronaos, opisthodomos, nymphaeum, internal crepidoma, courtyards, paradegrounds, bailey, demilune, caponiere, tenaille, flank, postern, rampart, face, bastion, merlon, or battlement; nor—obviously—pilasters, pillars, friezes, pediments, stylobates, triglyphs, scotia, torus, fillets, finials, and flutes, capitals, whether Ionic, Doric, or Corinthian, with volutes, abacuses, rosettes, acanthus leaf, or metopes, guttas, mutules, acroterions, dentils, or modillions, or even trefoil, Tudor, stilted, horeshoe, ogee, lancet, or equilateral arches, most probably resembling basket handle though without any sign of keystone, pier, spandral, voussoir, springer, or import.

Picture that. In your dreams.