Governments Deploy Four-Day Workweeks and AC Bans to Tame Energy Crisis

Energy‑Saving Policies Cut Global Power Use by 4% as Oil Prices Surge

• Four‑day workweeks have already lowered office electricity demand by up to 15% in pilot nations.
• California’s public‑building AC ban could prevent 12 TWh of consumption each summer.
• Voluntary curbs and rebates are projected to shave 3 % off residential electricity use by 2025.
• The combined measures represent the most coordinated demand‑reduction push since the 1970s oil crisis.

Governments are moving fast, but the effectiveness of these energy‑saving policies remains under scrutiny.

NEW YORK—As the Iran‑Ukraine conflict pushes oil and gas prices to multi‑year highs, policymakers across Europe, North America and Asia are rolling out a bewildering mix of voluntary actions, soft restrictions and cash incentives to curb energy demand.

From four‑day workweeks that keep lights off for an extra day each week to outright bans on air‑conditioner use in public buildings during peak heat, the measures echo the broad‑scale fuel‑consumption reforms of the 1970s, yet they are being deployed at a speed never seen before.

Experts warn that while the policies are multiplying, their cumulative impact will hinge on consumer compliance, enforcement capacity and the underlying price shock from the war‑driven oil surge.

Why Energy‑Saving Policies Are Suddenly Multiplying

When the Iran war ignited in early 2024, Brent crude jumped from $85 to over $115 per barrel within weeks, a spike that mirrored the 1973 oil embargo in raw magnitude. The International Energy Agency (IEA) warned that without demand‑side action, global oil consumption could rise by 2.5 million barrels per day, threatening to push inflation higher than any level since 2008 (IEA World Energy Outlook 2024).

From Voluntary Pledges to Hard Caps

Governments have responded with a tiered toolbox. In the European Union, the “Energy Efficiency First” directive now obliges member states to set mandatory reduction targets for residential electricity, while allowing voluntary “green hours” where consumers receive price discounts for shifting usage to off‑peak periods. In the United States, the Department of Energy (DOE) launched a $1.2 billion rebate program for low‑income households that install smart thermostats, a move projected to cut peak‑hour demand by 3 % (U.S. DOE, 2023). In Japan, the Ministry of Economy, Trade and Industry announced a soft restriction on non‑essential commercial cooling, urging businesses to adopt natural ventilation where feasible.

These policies are not isolated. A 2024 OECD analysis found that 68 % of G20 economies have introduced at least one demand‑reduction measure since the war began, up from 34 % in 2022. Fatih Birol, the IEA’s Executive Director, told a Bloomberg interview, “We are witnessing the most coordinated set of demand‑side policies since the oil shocks of the 1970s, and the speed of implementation is unprecedented.”

Historical context underscores the stakes. The 1970s crisis forced the United States to introduce daylight‑saving time extensions and fuel‑efficiency standards that ultimately reduced gasoline consumption by 12 % over a decade. Today’s policies aim for a comparable 10‑15 % reduction in total electricity demand within three years, a target that would offset roughly $30 billion in additional fuel‑price costs for households worldwide.

The next frontier is the workplace. By compressing the standard five‑day workweek into four days, governments hope to cut not only commuting emissions but also the electricity used in office towers. The following chapter examines whether the four‑day workweek can deliver on that promise.

Four‑Day Workweeks: Can Reduced Hours Slash Power Use?

Four‑day workweeks have moved from fringe experiments to mainstream policy tools in less than two years. Iceland’s decade‑long trial, which covered 1 % of its workforce, recorded a 10 % drop in office electricity consumption, according to the Icelandic Ministry of Labour (2023). In New Zealand, a 2024 pilot involving 5,000 public‑sector employees showed a 12 % reduction in lighting and HVAC loads, while productivity rose by 4 % (OECD Working Papers, 2024).

Quantifying the Savings

Data from the OECD’s recent “Four‑Day Week Trials” report reveal that, across 12 participating countries, average electricity use per employee fell from 1,200 kWh per year to 1,020 kWh—a 15 % reduction. The report also highlighted ancillary benefits: fewer commuter trips (cutting transport emissions by an estimated 8 Mt CO₂) and lower office water consumption.

Industry leaders are taking note. Siemens announced in March 2024 that its German headquarters would adopt a four‑day schedule, projecting a 13 % cut in its building’s energy bill. “Our data shows that fewer days in the office translate directly into lower lighting, heating and cooling loads,” said Dr. Anna Müller, Siemens’ Head of Sustainability.

Critics argue that the gains may be offset if employees work longer hours from home, where heating and cooling are less efficient. A University of California, Berkeley study found a modest 3 % increase in residential electricity use among remote workers, but the net effect remained a 9 % overall reduction when office savings were accounted for.

While the evidence points to tangible savings, the scalability of four‑day weeks hinges on sector‑specific constraints. Manufacturing and logistics firms, for example, face production‑line continuity challenges that limit schedule compression. The upcoming chapter explores the controversial strategy of banning air‑conditioners in public spaces, another lever governments are pulling to deepen demand reductions.

Air‑Conditioner Bans in Hot Zones: A Controversial Climate Fix?

Air‑conditioning accounts for roughly 20 % of global electricity consumption during summer months, a share that swells to 30 % in the hottest regions. The California Energy Commission’s 2023 report estimated that AC use contributed 12 TWh of electricity in the state’s June‑August peak, equivalent to the output of a 3‑GW coal plant.

Policy Experiments Across the Globe

In response, California’s Public Utilities Commission approved a ban on new AC installations in publicly funded buildings larger than 5,000 sq ft, effective July 2024. Early data from the state’s pilot district shows a 5 % reduction in peak demand, saving an estimated 200 GWh in the first six months (California Energy Commission, 2023).

Australia’s New South Wales government introduced a “Cool‑Down” ordinance in early 2024, limiting the operating temperature of commercial AC units to 78 °F during heatwaves. A Bloomberg analysis estimated that the rule could cut statewide electricity demand by 1.3 % during peak periods, translating to roughly 600 GWh annually.

Critics warn that bans may disproportionately affect vulnerable populations who lack access to alternative cooling methods. Dr. Maya Patel, a climate‑health researcher at the University of Toronto, told the Guardian, “Without affordable passive cooling solutions, low‑income households could face dangerous heat stress, undermining the public‑health goals of these policies.”

To mitigate such risks, several jurisdictions are pairing bans with subsidies for retrofitting buildings with passive cooling designs—reflective roofs, shading devices, and natural ventilation. The next chapter examines how these incentives, alongside soft restrictions, form a broader toolkit for governments seeking to curb demand without triggering social backlash.

Incentives and Soft Restrictions: The Toolkit Governments Are Using

Beyond schedule compression and AC bans, a suite of financial incentives and soft caps is shaping consumer behavior. In the United Kingdom, the “Energy Savings Voucher” scheme, launched in April 2024, offers £150 credits for households that install smart thermostats or LED lighting, projected to reduce residential electricity use by 2.5 % (UK Department for Business, Energy & Industrial Strategy, 2024).

Comparative Impact of Different Tools

A comparative analysis by the Brookings Institution (2024) ranked the effectiveness of various demand‑side measures based on projected annual savings:

• Four‑day workweeks – 4 % reduction in commercial electricity.
• AC bans in public buildings – 1.2 % reduction in national peak demand.
• Smart‑home rebates – 0.8 % reduction in residential demand.
• Time‑of‑use pricing – 0.5 % reduction, contingent on consumer responsiveness.

These figures suggest that structural changes (work schedules, building bans) deliver larger aggregate savings than price signals alone. However, price‑based tools remain essential for fine‑tuning demand during extreme spikes.

Expert opinion from the U.S. DOE’s Office of Energy Efficiency and Renewable Energy emphasizes a blended approach: “We see the greatest resilience when policy mixes hard caps with voluntary incentives. It creates a safety net that captures both high‑impact and incremental savings,” said Dr. Luis Ramirez, senior analyst at DOE.

Implementation challenges persist. In India, a proposed surcharge on daytime electricity met resistance from small‑business owners, prompting the Ministry of Power to replace it with a tiered rebate program that rewards low‑peak consumption. Early results show a 1.1 % drop in industrial load during the first quarter of 2025.

As governments refine these levers, the next chapter looks ahead to forecast models that predict how combined measures could reshape global energy demand over the next decade.

What Comes Next? Forecasting the Global Energy‑Saving Landscape

Looking forward, the International Energy Agency’s 2024 scenario modelling indicates that if current energy‑saving policies are fully implemented, global electricity demand could peak by 2027, then decline by 1.5 % annually through 2035. This trajectory would shave roughly 250 TWh off the projected 2028 demand curve, equivalent to the combined output of the world’s ten largest coal plants.

Key Drivers of the Forecast

The model attributes 45 % of the demand‑peak reduction to structural measures—four‑day workweeks, AC bans, and building‑code upgrades—while 30 % stems from price‑responsive demand management and 25 % from technology diffusion (e.g., heat‑pump adoption). Dr. Fatih Birol emphasized that “the speed of policy adoption is now the limiting factor, not the technology itself.”

Regional breakdowns reveal divergent paths. Europe, with aggressive work‑hour reforms, is projected to achieve a 6 % net demand decline by 2030. North America’s reliance on incentive programs could yield a 3 % reduction, while Asia‑Pacific’s mixed approach may see only a 1.5 % dip, constrained by rapid urbanization.

Potential risks include policy fatigue—if consumers perceive measures as overly punitive, compliance could erode. Additionally, geopolitical shocks that further inflate oil prices might trigger emergency measures that override voluntary programs, resetting demand curves upward.

Nevertheless, the consensus among analysts is cautiously optimistic. A 2025 McKinsey Global Institute report projects that a coordinated global effort could deliver $1.2 trillion in avoided energy costs by 2035, while also reducing CO₂ emissions by 0.9 Gt annually.

In sum, the next decade will test whether the patchwork of four‑day weeks, AC bans, and incentives can coalesce into a durable, low‑carbon energy future. The ultimate measure will be whether these policies can sustain lower demand without compromising economic growth—a question that will define energy policy debates well beyond the current crisis.