Here, the GCI is testing a humidistatically controlled mechanical ventilation and electrical heating system for its efficacy in controlling the high relative humidity problem in the building. Extended wood decay of interior sheathings and floors on the ground floor of Hollybourne Cottage. The biodeterioration of building fabrics is the result of high levels of relative humidity in the cottage's walls and basement. One of supply fans for the ventilation system being installed in the Hollybourne Cottage's basement. An inside view of the cottage's attic, with exhaust fans mounted on the window openings.
External louvers provide protection on the outside.
Here, as at Hollybourne Cottage, the GCI is experimenting with systems to moderate the high relative- humidity problem in the building. An inside view of the Historic Archive, with the monitoring sensors in the foreground and an exhaust fan, mounted on the window, in the background. View of the Historic Archive, with a convective heater and agitator fan in place.