Space heating is the largest energy user in a typical commercial building, according to the U.S. Department of Energy, accounting for about 35% of total energy consumption. If you're concerned about winter heating costs, take a step back and consider these simple, low-cost measures that can improve heating system performance, save money and increase building comfort.

1. Get a tune-up

Before the start of the heating season, have your system cleaned and inspected by a qualified professional to make sure all parts are operating properly. No matter what type of heating system you use, an inspection will help ensure efficient operation and reduce the risk of maintenance issues.

2. Change filters

Check all air filters and replace them regularly throughout the heating season. Dirty or clogged filters reduce air flow, increasing the energy required for heating.

3. Ensure airflow

Uniform airflow is necessary to optimize heating system efficiency and ensure a comfortable workplace. Make sure air vents are free of obstructions, such as furniture and office equipment, to ensure that warm, conditioned air flows freely.

4. Weatherize your facility

Inspect doors and windows for worn or damaged caulk and weather stripping — repair or replace when necessary. Hire a qualified contractor to inspect your building and make sure it is insulated properly according to appropriate energy efficiency standards.

5. Take control

Install smart, programmable thermostat to optimize savings, comfort and convenience. Programmable thermostats can be set to automatically adjust building temperatures based on your operating schedule. Smart models provide cool features, such as remote control as well as self-learning, where they can adjust comfort levels based on occupancy patterns, weather conditions and more.

6. Seal duct leaks

Examine accessible heating ductwork for leaks and seal with mastic tape. Leaky ducts allow up to 30% of the air moving through them to escape, wasting energy. Manual sealing can be time consuming and labor intensive. Advanced aerosol-based technology can seal your entire duct system, saving energy and improving occupant comfort.

If your heating system is 15 years old or older, or in need of repair, consider replacing it with a new ENERGY STAR®-certified unit. ENERGY STAR commercial HVAC equipment is independently tested to use less energy than standard units while still providing the same level of performance.