How to Reduce Commercial Energy Usage

Energy costs are one of the largest controllable expenses for commercial properties. Buildings that use energy more efficiently lower operating costs, improve occupant comfort, and reduce carbon emissions, all while increasing the value of your building.

Let’s look at the practical steps facility managers and business owners can take today to make their building materially more energy efficient.

What is an Energy Efficient Building?

An energy efficient building uses less energy to operate the building’s systems (lighting, heating, cooling, ventilation, and plug loads) than a conventional building of similar size and use.

That efficiency comes from three things working together: better equipment (LEDs, high-efficiency HVAC), smarter controls (sensors, building management systems), and a tighter envelope (insulation, windows, air-sealing).

High-performing systems demonstrate measurable results. On average, ENERGY STAR certified commercial buildings use about 35% less energy than typical buildings nationwide.

Why Energy Efficiency Matters in Commercial Buildings

There are four reasons owners and operators prioritize energy efficiency:

• Reduces operating costs: Lower energy use reduces monthly utility bills and maintenance costs, helping improve net operating income.
• Improve occupant comfort and productivity: Better HVAC control, comfortable lighting, and consistent temperatures reduce complaints and provide a more comfortable environment in the building.
• Meet regulations and sustainability goals: Local energy codes and corporate ESG targets increasingly require measurable performance. Utility and government incentives and tax deductions may also reward deeper savings.
• Reduces carbon footprint: Less energy consumption means fewer carbon emissions. This is an increasingly important factor for tenants, investors, and communities.

Those factors make energy efficiency one of the highest-return investments in commercial real estate.

The Strategy to Reduce Energy Usage in Commercial Buildings

Approaching energy efficiency with a proper strategy will allow for maximum savings. Below is a phased process that is easy for facility managers and business owners to follow.

1. Conduct a commercial energy audit

A thorough energy audit gives you the baseline metrics you need: current energy use, equipment inventory, operating hours, and systems that drive peaks.

Audits identify opportunities for quick wins (lighting retrofits, controls) and reveal deeper opportunities (HVAC replacements, envelope work).

2. Upgrade lighting systems

Lighting is a great place to start. In typical office settings, lighting accounts for a large share of electricity use. With industrial lighting solutions, like warehouse lighting, outdated lighting can be very expensive. Therefore, upgrades deliver large returns. There are two ways to make a lighting system more energy efficient: upgrading to LED lighting and utilizing lighting controls.

• LED retrofits: Modern LED fixtures or retrofit kits cut lighting energy dramatically (field estimates range widely; DOE retrofit projects have shown 40–70% reductions in lighting energy depending on the approach).
  
• Lighting controls: Occupancy sensors, daylight harvesting, and networked controls let you reduce light levels automatically. Studies and program data show controls paired with LEDs through professional commercial lighting services, they can deliver substantial additional savings. Industry averages for networked lighting controls are high, and specific programs report lighting energy savings in the 30–50% range depending on the strategy.

If you want a turnkey starting point, have a lighting contractor conduct a lighting audit in your facility to measure current usage and see how much you can save.

3. Optimize HVAC systems

HVAC is another high energy user in a building. Improvements here include equipment upgrades, control tuning, and operational changes.

High-impact HVAC actions you can take to make your system more energy efficient:

• Right-size and upgrade equipment. New, higher-efficiency chillers, boilers, heat pumps, and variable-speed drives (VFDs) reduce energy use; high-performance HVAC can deliver 10–40% savings depending on scope.
• Commissioning and recommissioning. Many systems underperform simply because settings drift. Commissioning verifies that systems operate as intended and can pay back rapidly.
• Variable air volume (VAV) and VFD retrofits. Converting constant-volume systems or adding VFDs to motors can produce 10–20% HVAC energy savings or more.
• Operational improvements. Scheduling setpoints, demand control ventilation, and routine maintenance (filters, coils) keeps efficiency high.

If you’re exploring a phased upgrade, start with controls and commissioning before replacing major plant equipment. Keep an eye out for rebates and incentives if you’re planning to upgrade your system.

4. Improve the building envelope and insulation

The building envelope (walls, roof, windows, and doors) sets the baseline thermal performance. Simple measures like sealing leaks, upgrading insulation, and replacing drafty windows can reduce heating and cooling loads and improve occupant comfort.

Envelope improvements are especially effective when paired with HVAC right-sizing. Smaller heating and cooling loads allow you to downsize equipment, which lowers capital cost and operating expense over the building lifecycle.

5. Implement smart building technologies

Controls and analytics change the game because they allow continuous measurement and savings.

• Building Automation Systems (BAS) and integrated platforms centralize control and provide data for optimization. BAS deployments frequently identify double-digit savings; industry case studies and business analyses show savings potential in the 10–33% range, depending on the building and the level of integration.
• IoT sensors and analytics give visibility into equipment performance, enabling targeted action and predictive maintenance.
• Integration across systems (lighting, HVAC, plug loads) unlocks additional savings by avoiding counterproductive setpoints and leveraging occupancy data across systems.

Start with a clear use-case. For example, reduce after-hours HVAC runtime, and scale once you see verified savings.

6. Incorporate renewable energy

Renewable energy sources, such as on-site solar, reduce grid energy purchases and hedge fuel price risk. Furthermore, investing in commercial solar directly supports corporate sustainability targets.

Financial viability depends on local incentives, demand profiles, and capital strategy; pair renewable investments with efficiency measures to get the most value from every kilowatt of on-site generation.

The Future of Energy Efficient Buildings

Several trends will shape the next wave of savings and performance:

• AI-powered optimization. Machine learning applied to BAS systems can identify patterns and suggest control adjustments that consistently trim energy use without sacrificing comfort.
• Net-zero and near-zero buildings. Energy Codes and corporate targets are pushing new construction toward net-zero-ready designs; deeper retrofits make older buildings compatible with those goals.
• Stricter performance standards and incentives. Policy momentum and tax incentives are increasing the financial upside for deep efficiency projects.

These trends favor an integrated approach: measure first, pursue no-regret measures, then invest in smart controls and renewables.

Start Saving Energy (and Money)

Energy efficiency is a practical path to lower operating costs, better occupant experience, and measurable progress on sustainability goals. Start with an energy audit to build a data-driven plan, then prioritize lighting and controls for fast wins while planning HVAC and envelope work over the mid-term.

Where possible, pair upgrades with incentive programs and tax deductions to accelerate payback. Evidence shows that certified, high-performing buildings use substantially less energy than average buildings. The savings are real and repeatable.

FSG is ready to help your business save on operating costs by becoming more energy efficient. Contact us today to schedule an energy audit or build a prioritized, finance-ready plan that lowers costs and improves building performance.

Frequently Asked Questions

What’s the fastest way to reduce commercial energy usage without major construction?

The quickest wins usually come from lighting upgrades (LED + controls) and HVAC tuning/commissioning, because they reduce energy use without replacing major equipment. FSG recommends starting with an audit, then prioritizing lighting and controls as the fastest-return measures.

How do I know which building systems are driving my highest energy costs?

A commercial energy audit establishes baseline usage, equipment inventory, operating hours, and what systems drive demand peaks. FSG emphasizes that audits help identify quick wins (like lighting retrofits) and also point to deeper opportunities (HVAC and envelope work).

Is it better to upgrade lighting first or HVAC first to save the most energy?

In many buildings, lighting is the best first step because it’s a high-impact, relatively straightforward retrofi, and it can also reduce cooling load. FSG recommends prioritizing lighting and controls early while planning HVAC and envelope improvements as mid-term upgrades.

What are “smart building technologies,” and how do they actually reduce energy usage?

Smart building tools like BAS platforms, IoT sensors, and analytics reduce energy by continuously measuring performance, optimizing schedules, and preventing systems from running unnecessarily. FSG notes that integration across systems (lighting, HVAC, plug loads) can unlock additional savings by aligning operations with occupancy and real-time conditions.

How do I reduce after-hours energy waste in a commercial building?

After-hours waste is often reduced with controls and scheduling, like occupancy-based lighting, daylight harvesting, and HVAC setpoint schedules that limit runtime when the building is empty. ENERGY STAR also recommends doing a nighttime audit to identify equipment that’s running when it shouldn’t be.