The Henry Moore foundation Archives present a unique challenge to the arena that is close control. Consisting of a range of spaces each with unique requirements, the Henry Moore Foundation preserves everything from original drawings to film negatives. The most demanding room was the Negative Cold store archive requiring a maintained temperature of 7°C with low humidity fluctuations, not a problem for the versatile CD3. We supplied a combination of both DX and Chilled Water CD3 close control units ensuring tight tolerances in both temperature and relative humidity.