Table 2. Sample Integration of Preservation Approaches in Buildings

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Category of Control Classification Designation Likely Environmental Range Collections Use Typical Structure Types
Uncontrolled I. T: 100°F (38°C)
-10°F (-25°C)
RH: +/-40%
100% - 20%
Repros, hardy tools and wagons No occupancy; open to viewers year-round; no locks on building Privy, stocks, bridge, sawmill, well
Uncontrolled II. T: 90°F (32°C)
32F (0°C)
RH: +/-30%
90% - 30%
Educational repros, hardy tools, machinery, wagons, hardy carriages, vehicles No occupancy; spcial events access Cabins, barns, sheds, silos, icehouse
Partial Control III. T: 80°F (26°C)
50°F (10C)
RH: +/-20%
70% - 30%
Period rooms, hardy textiles, furniture, metals, ceramics, no inlays or sensitive materials Summer tour use; closed to public in winter; no occupancy Boat, train lighthouse, rough frame house, forge
Partial Control IV. T: 75°F (24°C)
60°F (15°C)
RH: +/-15%
60% - 30%
Many museum materials, books, paper, special cases as needed Staff in isolated rooms - gift shop; walk through visitors only; limited occupancy; no winter use Finished house, church, meeting house, store, inn
Climate Controlled V. T: 75°F (24°C)
70°F (21°C)
RH: +/-10%
55% - 35%
Fine arts, inlays, conserved materials, most museum materials, finely crafted Education groups; good open public facililty; unlimited occupancy Museums, research libraries, galleries, exhibits, storage rooms
Climate Controlled VI. T: 70°F (21°C)
68F (20°C)
RH: +/-5%
50% - 40%
Unstable photographs, panel paintings, bronzes, extemely old materials No occupancy; access by appointment Vaults, storage rooms, cases

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