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We consider it likely that if a 1ºC rise in temperature occurred (or if the temperature rose even a few more degrees), such a facility would continue on and try to cope with the situation. The heating costs in winter would be less—or would they be? What would happen to energy costs throughout the year? What would happen to preservation costs?

Three Major Problems

Humidistatic Heating Effectiveness Humidistatic heating has been a great low-cost way to preserve artifacts and historic buildings over much of the nine-month yearly heating cycle in northern heating climates. Humidistatic heating has used low-level heating as a means of controlling relative humidity without the risk of adding active humidification in buildings not capable of accommodating it without conden- sation damage. Any increase in outdoor weather temperature would reduce the number of hours of cold weather during which the use of humidistatic heating would be of benefit.

Summer Humidity Increase? If the planet warms up, will the amount of moisture in the air increase? It stands to reason that it will. It is very possible that the tropical regions will expand and the heating-climate re- gions will decline. Such changes would mean that there would be an increase in the number of less financially supported historic buildings in the enlarged tropical region. The existing fa- cilities, as well as facilities in the then-expanded tropical region, would become more suscep- tible to deterioration from increased exposure to warm and wet weather, which causes mold and rot in the absence of summer cooling and reheat dehumidification systems. To prevent these adverse effects, such institutions would need to introduce new climate control systems and would need to devise new ways to pay the increased energy bill. For some, such demands could break the budget.

Conrad Climate Control Systems Design and Climate Change Contribution to the Experts’ Roundtable on Sustainable Climate Management Strategies, held in April 2007, in Tenerife, Spain

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