Managing indoor climate risks in museums / Bart Ankersmit, Marc H.L. Stappers.

8.3 Zoning.

Foreword Acknowledgements Contents Chapter 1: Introduction 1.1 Introduction 1.2 A Short History of Climate Control 1.3 Nine Steps References Chapter 2: Step 1: Towards a Balanced Decision 2.1 Introduction 2.2 Starting with Whatś Important 2.2.1 Using the Mission Statement as a General Basis to Develop Values 2.2.2 Involving Stakeholders 2.3 What Do We Really Want? 2.4 Making Objectives Measurable 2.5 A Case Study 2.6 Conclusions References Chapter 3: Step 2: Valuing Heritage Assets 3.1 Introduction 3.2 Valuing the Building 3.3 Values 3.4 Value Classification. 3.5 Values and Optimizing the Indoor Climate3.6 The Valuing Process 3.7 Conclusions References Chapter 4: Step 3: Assessing the Climate Risks to the Moveable Collection 4.1 Introduction 4.2 An Incorrect Relative Humidity 4.2.1 The Relative Humidity Is Above 0% 4.2.2 The Relative Humidity Is Above or Below a Critical Value 4.2.3 The Relative Humidity Is Above 75% 4.2.4 The Relative Humidity Fluctuates Too Much for Too Long Wooden Artifacts Canvas Paintings Ivory and Objects Made of Bone Textiles Library and Archival Collections 4.3 The Proofed Relative Humidity Fluctuation. 4.4 The Response Time of Hygroscopic Materials4.5 Incorrect Temperature 4.5.1 The Temperature Is Too High How Can an Old Newspaper Survive? 4.5.2 The Temperature Is Too Low 4.5.3 The Temperature Fluctuates Too Much 4.6 Climate Classes and Risks 4.7 Conclusion References Chapter 5: Step 4: Assessing Building Needs 5.1 Introduction 5.2 Moisture 5.2.1 Wood Decay by Fungi in Buildings 5.2.2 Typical Species 5.2.3 Limits for Growth 5.2.4 Control of Wood Rot 5.3 Salt Attack 5.3.1 Damage Mechanism 5.3.2 Location of Salt Damage 5.3.3 Sources of Salt Contamination. 5.3.4 Assessing the Risk of Salt Contamination5.4 Frost Damage 5.5 Corrosion of Metals 5.6 Wood Deterioration by Insects in Buildings 5.7 Decorative Finishes 5.7.1 Gilt Leather 5.7.2 Traditional Wallpaper 5.8 A Case Study 5.9 Conclusions References Chapter 6: Step 5: Assessing Human Comfort Needs 6.1 Introduction 6.2 Parameters Influencing Thermal Comfort 6.3 Fangerś PMV Model 6.4 Adaptive Comfort 6.5 Indoor Air Quality 6.6 Alliesthesia 6.7 Uniform or Local Conditioning? 6.8 Conclusions References Chapter 7: Step 6: Understanding the Indoor Climate 7.1 Introduction. 7.2 First Barrier Principle7.3 Heat 7.3.1 Understanding Heat Transfer 7.3.2 Heat Sources 7.3.3 Thermal Bridges 7.3.4 Thermal Mass Special: Roofs in the Tropics Special: Dew Point and Condensation 7.4 Air 7.4.1 Infiltration 7.4.2 Ventilation 7.4.3 Air Flow 7.5 Moisture 7.5.1 Vapor Transport by Diffusion 7.5.2 Vapor Transport by Convection 7.5.3 Water Transport by Capillary Sorption 7.5.4 Interstitial Condensation 7.5.5 Hygric Mass 7.6 Conclusion References Chapter 8: Step 7: Defining Climate Specifications 8.1 Introduction 8.2 Combining Collection, Building and Human Needs.

This book elaborates on different aspects of the decision making process concerning the management of climate risk in museums and historic houses. The goal of this publication is to assist collection managers and caretakers by providing information that will allow responsible decisions about the museum indoor climate to be made. The focus is not only on the outcome, but also on the equally important process that leads to that outcome. The different steps contribute significantly to the understanding of the needs of movable and immovable heritage. The decision making process to determine the requirements for the museum indoor climate includes nine steps: Step 1. The process to make a balanced decision starts by clarifying the decision context and evaluating what is important to the decision maker by developing clear objectives. In Step 2 the value of all heritage assets that are affected by the decision are evaluated and the significance of the building and the movable collection is made explicit. Step 3. The climate risks to the moveable collection are assessed. Step 4: Those parts of the building that are considered valuable and susceptible to certain climate conditions are identified. Step 5. The human comfort needs for visitors and staff are expressed. Step 6: To understand the indoor climate, the building physics are explored. Step 7. The climate specifications derived from step 3 to 5 are weighed and for each climate zone the optimal climate conditions are specified. Step 8: Within the value framework established in Step 1, the options to optimize the indoor climate are considered and selected. Step 9: All options to reduce the climate collection risks are evaluated by the objectives established in Step 1.