Table 2. Sample Integration of Preservation Approaches in Buildings
| 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 |