infared imaging Greiner Heating & Air Conditioning

Improving home performance and energy efficiency for our customers.

Energy efficiency has long been a focus for homeowners and contractors alike. In a changing world, the importance of home performance is only increasing with time, and at Greiner, we stress this to each and every customer we serve. Improving home performance is one of our primary goals with every project we take on, which is why we offer energy upgrades that can help take your home's energy efficiency to the next level.

The Benefits of Energy Upgrades with Greiner

At Greiner, we work hard to assist our customers in taking steps toward an energy efficient future. Making energy upgrades to your home such as those outlined above includes a number of benefits:

  • Lower energy bills
  • Longer duration of systems life
  • Improved home comfort
  • Safer, cleaner indoor air
  • Reduced impact on the environment

The Best Home Upgrades for Year Round Benefits

If you’re tired of quick fixes that don’t last when it comes to your home performance, check out these home upgrades that will provide benefits like increase home comfort and savings on your utility bills all year round!

Air Sealing

Eliminate the small cracks and holes in your home that allow for outside air to infiltrate your home, as well as your conditioned air to leak out. Enjoy cleaner air and consistent temperatures!

Energy Audit

Pinpoint the deficiencies in your home performance with a thorough diagnostic test of your home called an energy audit. This allows you to make educated decisions about your future home upgrades and get the most bang for your buck.


Keep the heat right where you want it all year long: inside in the winter and outside in the summer. Proper insulation is one of the most effective measures for ensuring year round home comfort.

Home Zoning

Stop wasting energy (and money) heating and cooling rooms you are not using by separating your home into multiple comfort “zones”. Home zoning saves money, and will put an end to fighting over the thermostat settings.

Home upgrades to benefit your home


thermal imaging gun Greiner Heating & Air Conditioning

Your home is a complex system. We understand it, inside and out.

Home performance is not unlike the human body or an automobile. When everything is running smoothly, the overall system functions as it should. Should one thing go wrong, however, everything is affected. Keeping all aspects of home performance operating at their peak is essential for your home to function properly as a system, and it all starts with a home energy audit.

cellulose insulation california Greiner Heating & Air Conditioning

Increase your home comfort year-round with high-performance attic insulation.

At the end of the day, there’s nothing more important than being able to come home to a comfortable living space. California summers can be overwhelmingly hot, and no one wants to be chilly on a cold winter’s night in their own home. In both scenarios, indoor comfort levels can often come down to whether or not your attic is properly insulated.

caulking around windows is a good way to seal your home's envelope

heat loss infographic greiner hvac

A fast, effective way to keep unwanted drafts and outside air from entering your home.

Every home is designed with the idea of keeping conditioned air inside and not allowing outside air to ent

smart home thermostat Greiner Heating & Air Conditioning

Customizable home comfort the way you want it, no matter which room you're in.

Do you ever find yourself wondering why certain parts of your home just never seem to get to the right temperature while other areas remain comfortable year-round? In most cases, it has to do with your home's heating and cooling system.

good indoor air quality california Greiner Heating & Air Conditioning

Because you owe it to yourself and your family to breathe clean, conditioned air.

There's a lot to be said for knowing that the air being circulated throughout your home is clean and safe to breathe. Clean air not only makes your home's environment more pleasant, but it can have a dramatic impact on the health of your family. This is especially true for family members who suffer from asthma, a very common condition here in California.

hands connecting duct work Greiner Heating & Air Conditioning

Your home needs healthy lungs to breathe properly. Fortunately, we can help.

When was the last time you took a moment to consider the quality of your home's ductwork? Duct systems are considered to be among the most often overlooked aspects of a home, yet the role they play is undeniable. Think of your home's ductwork as its lungs. When things are clear, clean and well-designed, you've got nothing to worry about. Not all ductwork is created equal, however, and over time, duct systems can become dirty and loaded with dust and other contaminants.

Boost comfort and save energy!

Plus, we'll help you get up to $6,500 in home efficiency upgrades.

Contact us to learn more. 

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What Our Customers are Saying

Mike E Testimonial | Vacaville | Greiner Heat & AC

Would you recommend Greiner Heating, Air, & Solar?


Please tell us why?

Very friendly, professional service from start to finish!

Comfort Advisor: Danny

Installers: Ruben, Bobby & Jairo

Mike E

No money down solar PV financing!

We want to make it easy for you to achieve an efficient and comfortable home. That's why we have partnered with SunPower.

Greiner Heating & Air Conditioning works with SunPower

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Summer is almost here and warmer days are just around the corner! Summers in Davis, CA have been getting hotter every year—is your AC ready to keep you cool in 2023? At Greiner Heating, Air, &... Read more