How Museum Works | The Museum and the Climate

A museum has an awkward climate problem: it is trying to preserve the past inside a climate that is changing around it.

The roof was designed using yesterday’s rainfall assumptions. The cooling plant was sized for yesterday’s temperatures. The collection store depends on electricity. A fragile textile needs limited environmental fluctuation. A blockbuster exhibition may require international loans. Visitors travel to the building. Temporary galleries consume timber, acrylic, steel, lighting and digital equipment.

Meanwhile, the climate crisis is no longer an abstract future topic for museum interpretation. It is entering museum operations.

The museum is now preserving heritage inside the same environmental system whose instability threatens the heritage.

ICOM’s revised 2026 Code of Ethics explicitly reflects contemporary challenges including the climate crisis. ICOM’s wider sustainability work increasingly treats museums not only as institutions that explain environmental change but as organisations that must examine their own buildings, energy use, exhibitions, transport and long-term resilience.

This article owns that long-horizon problem. When the Museum Must Survive a Disaster asks what happens when normal protection breaks. This article asks how the museum redesigns normality before climate pressure turns repeatedly abnormal.

Quick Read: The Museum Climate Mechanism

MEASURE FOOTPRINT + HAZARDS → UNDERSTAND COLLECTION VULNERABILITY → REDUCE ENERGY + MATERIAL DEMAND → IMPROVE BUILDING ENVELOPE → TUNE ENVIRONMENTAL CONTROL → DECARBONISE ENERGY → DESIGN EXHIBITIONS FOR REUSE → REDUCE HIGH-CARBON MOVEMENT WHERE PRACTICAL → BUY BETTER → PREPARE FOR HEAT / FLOOD / SMOKE / OUTAGE → MONITOR COLLECTION RESPONSE → REPORT → LEARN → ADAPT.

And another loop runs through the public side:

COLLECTION EVIDENCE → CLIMATE RESEARCH → EXHIBITION + EDUCATION → PUBLIC UNDERSTANDING → COMMUNITY CONVERSATION → NEW QUESTIONS → NEW COLLECTING.

Museum climate work therefore has two jobs: reduce institutional impact and increase cultural capacity to understand change.

Preservation Has Always Used Energy

Museums control temperature and relative humidity because materials respond to environmental change.

Wood expands and contracts.

Metals corrode.

Mould responds to moisture.

Paper and textiles deteriorate differently under heat, light and humidity.

For decades, one answer was tighter environmental control.

The problem is that tighter control can require more energy.

Conservation can become environmentally self-defeating if the energy used to preserve collections contributes unnecessarily to the conditions that threaten them.

The New Question Is Not “Do We Control the Environment?”

The better question is:

How much control does this collection actually need, in this building, in this climate, for this use?

A stable bronze object may tolerate conditions that an unstable photographic process cannot.

A modern purpose-built store can behave differently from a historic building.

A gallery open twelve hours per day has different loads from a sealed store.

Climate-aware conservation therefore moves away from one universal number and toward risk-based environmental management.

The Building Envelope Can Save Collections and Energy at the Same Time

Before installing a larger cooling plant, fix the building.

Insulation.

Air leakage.

Shading.

Glazing.

Roof performance.

Vestibules.

Moisture control.

Smithsonian revitalisation work has shown how improved building envelopes, better glazing and more precisely controlled HVAC can protect collections while reducing energy demand. In one major National Air and Space Museum revitalisation, refined HVAC programming was expected to save about 20% in energy costs, while LED conversion was expected to save about 17% in lighting energy.

The important lesson is architectural:

The cheapest kilowatt-hour to decarbonise is often the one the building no longer needs.

A Museum Building Works Like a Thermal Battery

Thick walls, shaded mass and controlled air exchange can slow environmental change.

A lightweight glass box reacts quickly to outdoor heat.

A heavy masonry structure can buffer short fluctuations.

This does not make old buildings automatically sustainable.

It means building physics should be understood before mechanical systems are asked to do everything.

The museum’s first climate-control device may be its architecture.

Singapore’s Climate Makes Humidity a Serious Operational Variable

In tropical Singapore, high outdoor humidity changes the preservation problem.

Turning off air-conditioning casually can create moisture risk.

Opening loading doors can introduce humid air.

Cold surfaces can condense moisture.

Mould risk increases when warm, damp conditions persist.

Singapore’s museum decarbonisation problem therefore cannot simply copy a strategy developed for a cold, dry climate.

Climate action must be local enough to understand actual building physics.

Energy Efficiency Is Not the Same as Turning Systems Down Blindly

“Use less air-conditioning” sounds sustainable.

It can be irresponsible if it causes damaging humidity swings.

Good optimisation uses data.

Where are loads highest?
Which rooms need tighter control?
Which can tolerate wider bands?
Can systems be zoned?
Can schedules be adjusted safely?
Can equipment run more efficiently?
Can infiltration be reduced?
Can setpoints be informed by actual object vulnerability?

Efficiency is intelligent control, not blunt deprivation.

Climate Change Moves the Museum’s Hazard Map

Historic rainfall records become less reliable.

Extreme heat grows more plausible.

Sea-level rise changes coastal exposure.

Smoke can travel across regions.

Grid stress can increase outage risk.

In 2026, ICOM museum networks were already discussing unusual European heatwaves that forced museum closures and created difficult indoor conditions. This is the operational meaning of climate change: thresholds once treated as exceptional begin entering planning assumptions.

Adaptation Starts With Asking What Fails First

During prolonged heat, what fails first?

Cooling capacity?

Staff comfort?

Visitor safety?

Collection stability?

During flood, which store is lowest?

During prolonged outage, which systems have backup?

Adaptation converts broad climate projections into specific institutional failure modes.

Climate resilience becomes useful only when the museum can point to the component, collection or human system that would otherwise fail.

Collections Need Climate Triage Before Crisis

Which collections are most vulnerable to:

high humidity;
heat;
water;
smoke;
power loss;
rapid fluctuation?

A collection risk map can reveal where adaptation money produces the greatest preservation benefit.

Move vulnerable storage upward.

Improve drainage.

Create passive buffers.

Increase monitoring.

Prioritise backup capacity where loss would be irreversible.

Every New Acquisition Carries a Climate Cost

An object may be donated for free.

It may require conditioned storage for a century.

Large objects require large space.

Complex modern materials may require special environments.

Collecting policy therefore has an environmental dimension.

The question is not “Should museums stop collecting?”

It is:

Can the institution justify and sustain the lifetime stewardship burden of what it acquires?

Temporary Exhibitions Can Be Materially Expensive

Build wall.

Paint wall.

Print graphics.

Fabricate cases.

Install AV.

Run exhibition four months.

Demolish wall.

Repeat.

Temporary exhibition culture can become a manufacturing system with a short product life.

Climate-aware exhibition design asks whether structures can be modular, reused, repaired, reconfigured or stored for future use.

Design for Disassembly Before You Design for Opening Night

A panel screwed together can be separated.

A permanently bonded multi-material composite may become waste.

A modular case can serve another exhibition.

A hyper-specific architectural gesture may be impossible to reuse.

Sustainable deinstallation begins at the first design meeting.

The Carbon Cost of a Loan Is Not Only the Flight

International object movement can involve:

custom crates;
specialist trucks;
air freight;
courier travel;
hotels;
temporary climate control;
insurance and logistics;
return transport.

This does not mean museums should stop lending.

Loans can create extraordinary public and scholarly value.

The climate question asks whether the value justifies the movement and whether lower-impact alternatives exist.

Consolidated Shipping Can Reduce Repeated Movement

Where schedules and conservation requirements allow, institutions can coordinate transport rather than moving one object at a time.

Travelling exhibitions can optimise routes.

Couriers can sometimes supervise remotely where lender policy and object risk permit.

Digital surrogates can replace some low-value physical movement.

The point is not one universal rule.

It is reducing unnecessary movement without pretending all movement is unnecessary.

Visitor Travel May Exceed Building Emissions

For major cultural institutions, audience travel can be a significant part of the wider climate footprint.

The museum cannot control where every visitor lives.

But it can influence:

public-transport information;
cycling access;
coach management;
digital alternatives;
regional programming;
event scheduling.

This expands climate thinking beyond the electricity meter.

Procurement Is Climate Policy in Disguise

What timber is purchased?

How durable are cases?

Can graphics be recycled?

Can equipment be repaired?

Do contractors disclose environmental practices?

Do new digital systems create hardware replacement cycles?

Thousands of purchasing decisions can add up to more climate impact than one public sustainability campaign.

Digital Is Not Automatically Low Carbon

Digitisation avoids some physical travel and expands access.

It also requires:

servers;
cloud storage;
networks;
screens;
cameras;
scanners;
backup systems;
device replacement.

High-resolution collections and AI services can create significant computational demand.

The museum should therefore ask whether digital infrastructure is durable, efficient and genuinely useful rather than treating every digital layer as environmentally free.

Preservation Copies and Access Copies Can Reduce Waste

Not every user needs the largest master file.

Preserve high-quality masters where justified.

Serve efficient access derivatives for everyday web use.

This protects preservation quality while reducing unnecessary bandwidth and processing.

Digital sustainability is partly information architecture.

Climate Interpretation Should Use the Collection’s Own Evidence

Museums can explain climate change through more than graphs.

Historic photographs show coastlines.

Herbaria show flowering times and geographic ranges.

Natural-history specimens preserve biological information from earlier environments.

Industrial collections show energy systems.

Design collections show changing material culture.

The museum can make environmental change materially visible.

But Museums Should Not Pretend They Stand Outside the Story

An exhibition criticising fossil-fuel dependence while using wasteful temporary construction invites a legitimate question.

An institution advocating climate responsibility while refusing to measure its own emissions weakens credibility.

The museum does not need purity.

It needs intellectual consistency and transparent improvement.

A climate exhibition becomes stronger when the institution can show what it is changing in itself.

Carbon Accounting Is a Map, Not a Moral Score

Measure building energy.

Business travel.

Freight.

Procurement.

Waste.

Perhaps visitor travel where methodology permits.

The point is not to generate one impressive number.

The point is to identify where intervention changes the system most.

Intensity Metrics Can Be More Useful Than One Total

Total energy can rise because a museum opens a new building.

Energy per square metre may fall.

Total visitor travel may rise because attendance doubles.

Impact per visit may fall.

Good climate measurement uses several indicators so growth, efficiency and absolute impact are not confused.

Climate Targets Need Collections Safeguards

Reduce energy 30%.

Excellent target.

But not if the method causes mould in storage.

The museum needs paired metrics:

energy reduction;
collection condition;
environmental stability;
visitor comfort;
building resilience.

Otherwise one optimisation can silently damage another responsibility.

Climate Adaptation Has an Equity Dimension

Heat does not affect every visitor equally.

Older people, young children, staff working long shifts and people with some health conditions may be more vulnerable.

Energy-saving measures that make galleries physically difficult to use can shift climate costs onto people.

Sustainability must therefore include human accessibility, not merely carbon efficiency.

Staff Need Climate Literacy Because Climate Decisions Cross Departments

Facilities manages energy.

Conservation sets object requirements.

Registrars organise loans.

Designers choose materials.

Procurement buys them.

Educators interpret climate.

Finance evaluates investment.

No one department owns the whole footprint.

Climate work is therefore a governance problem as much as an engineering problem.

The Museum Should Preserve Evidence of Its Own Transition

Old energy systems.

Climate plans.

Exhibition-material inventories.

Building-retrofit records.

Public debates.

Future historians may study how institutions responded to the climate crisis.

The museum itself is becoming part of the evidence.

How to Read a Museum’s Climate Strategy Intelligently

Baseline: Does the museum know where energy and material impacts occur?
Collections: Which environmental conditions are genuinely required?
Building: Has passive performance been improved before adding machinery?
HVAC: Are systems tuned to risk rather than inherited habit?
Energy: Is demand falling as supply decarbonises?
Hazards: Has climate change altered the risk map?
Adaptation: What fails first during heat, flood or outage?
Exhibitions: Are temporary materials designed for reuse?
Loans: Is unnecessary movement reduced without erasing cultural exchange?
Digital: Are computing and storage treated as real infrastructure?
Procurement: Do buying decisions reward durability and reuse?
People: Does climate action protect accessibility and staff welfare?
Interpretation: Does the collection help the public understand change?
Accountability: Are results measured and reported over time?

Climate Failure Tests

Failure	What Goes Wrong	Repair Question
Sustainability = lower HVAC	Energy drops while collections deteriorate	What environment does this material actually require?
Preservation = maximum control	Energy is consumed beyond demonstrable need	Which tolerances are evidence-based?
Climate = disaster only	Long-term adaptation is ignored	Which normal operating assumptions are becoming obsolete?
Temporary = disposable	Exhibition construction becomes systematic waste	What was designed for reuse?
Digital = zero carbon	Servers, storage and hardware disappear from the footprint	What infrastructure supports the digital layer?
Carbon = only metric	Collection risk and accessibility are sacrificed	Which paired safeguards are required?
Climate exhibition = climate action	Public messaging substitutes for operational change	What has the institution changed in itself?
One climate fits all	Strategies ignore local building physics	What does this place actually demand?

Frequently Asked Questions

Why do museums use so much energy?

Museums often operate large public buildings with lighting, security, digital systems and environmental control for collections. The amount varies greatly by climate, building type, collection and operational model.

Can museums relax temperature and humidity controls?

Sometimes, but changes should be risk-based and informed by collection vulnerability, building behaviour and local climate. Blindly widening environmental ranges can create conservation problems.

Are travelling exhibitions bad for the climate?

They create transport, packing and travel impacts, but can also deliver significant educational and cultural value. Museums can reduce unnecessary movement through route planning, consolidated freight, reuse and digital alternatives where appropriate.

What is climate adaptation for a museum?

It means preparing buildings, collections, operations and people for changing risks such as heat, intense rainfall, flood, smoke, power stress and other climate-related conditions.

Current Evidence and Professional Anchors

ICOM — Code of Ethics for Museums, revised 2026 for contemporary professional standards including the climate crisis and responsible resource management.
ICOM — Annual Report 2025, published 2026 for museums, sustainability and contemporary global challenges.
Smithsonian — Revitalization and Sustainability for building-envelope, HVAC and lighting efficiency combined with collection preservation.
Smithsonian — Facilities Management for energy management and museum operational infrastructure.
Smithsonian — Museum Support Center for controlled collection environments and maintainable building systems.

Where This Fits in the Museum Series

How Museums Work remains the canonical root.

When the Museum Must Survive a Disaster owns emergency response and recovery. Who Pays for the Museum? owns financial sustainability. The Museum and the Climate owns climate mitigation and adaptation across buildings, collections, exhibitions, movement, procurement and public interpretation.

Final Thought

Museums are institutions built around a promise to the future.

We will keep this.

We will remember this.

We will leave enough evidence that people after us can ask better questions.

The climate crisis makes that promise harder—and therefore more literal.

The roof, chiller, freight schedule, exhibition wall, digital server and acquisition decision now sit inside the same long-term stewardship problem.

A museum cannot protect the future of its collection while treating the future of its environment as somebody else’s department.