Here’s something many homeowners don’t realize: Your home works like a big, insulated cooler. The walls, windows, roof and insulation create what is called the thermal envelope. When that envelope has gaps or thin spots, your heating and cooling systems generally have to work overtime to keep you comfortable.

Think of it this way: pouring hot coffee into a cracked thermos means the coffee gets cold faster, no matter how hot it was when you made it. The same goes for your home. If warm air leaks out through drafty windows or an under-insulated attic in winter, your furnace keeps firing up to replace it. In summer, hot outdoor air sneaks in and your air conditioner runs constantly to cool it back down.

The good news is that you may improve your home’s insulation with some easy projects:

• Weather-stripping: Add or replace these around your doors and windows to seal air leaks.
• Insulation: Install in attics and crawl spaces where heat loss typically occurs to create a barrier that helps your heating and cooling systems operate more efficiently.
• Ductwork sealing: Duct connections can loosen over time. To help prevent heated or cooled air from escaping, check to see that your ducts are properly sealed.

These energy efficiency tips often require a relatively low cost investment compared to equipment upgrades, and you can tackle many yourself, in some cases. When you shore up your thermal envelope first, any new heating or cooling equipment you install later may work more efficiently instead of fighting an uphill battle.

Regular maintenance may help keep your equipment from losing energy over time.

Seasonal tune-ups may help keep your systems running at top performance. Licensed technicians generally clean components that accumulate dust and grime, test sensors to confirm they’re reading accurately, tighten electrical connections that can loosen over time and verify refrigerant levels in cooling systems. These adjustments may catch problems before they turn into breakdowns.

You can also do some maintenance tasks between professional visits:

• Change air filters. Put in a new filter every 1 – 3 months, depending on how much you use your system. Clogged filters choke off airflow and may force your equipment to strain harder than necessary.
• Clean outdoor AC unit. Regularly clear away leaves, grass clippings and vegetation that can block airflow and reduce efficiency.
• Install a smart thermostat. Computerized thermostats can set your temperature preferences on a schedule that works with your daily routine, helping optimize your system efficiency and reduce energy use.
• Inspect ductwork. Look for disconnections or damage that might let conditioned air escape into crawl spaces or attics.

These energy efficiency tips work together across all seasons that may help reduce your total annual energy use. Small adjustments add up to meaningful energy savings over time.