Serving Lake, Napa, and Mendocino Counties since 1970

    Offering Sales and Service of Heating, Cooling, and Solar Energy Systems.

    Call Us! (888) HEY-JONAS!

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News and Info

Last Chance to get a great deal on a Monitor Heater Trade in.

Now through the end of November, you can still get up to a $250 rebate on the purchase of a new Toyostove L-730 or L-560 when you trade in your old Monitor Heater. Contact us for details!

We are a Mitsubishi MiniSplit Systems Diamond Dealer!

Jonas has won the Mitsubishi Diamond Dealer award three years running. If you are looking for a reliable, economical, quality minisplit system, check out a Mitsubishi system from Jonas!

Jonas Energy donates new cooling system to Clearlake SPCA.

We've installed a great new AC system for the SPCA of Clearlake. Read about it here.

We are proud to carry the American Standard Brand for heating & cooling.

American Standard is the most reliable in the industry today for fewer repairs. Don't just take our word for it, check out one of the leading consumer rating magazines for proof. Survey says that they are among the brands with the lowest repair rates for both conventional and heat pump central a/c systems.

Social Media Updates

Testimonials Send us feedback

Thank you so much for working with us and helping us pick out the right heating and cooling system and for working with our tenants for the installation. It was a pleasure to talk to all of you on the phone and meeting Russell in person. Everyone was so nice and you all did a wonderful job.

-Sandi in Lower Lake

Thank you so very much for your most generous donation of the heater and AC for the SPCA Kelseyville. It was so kind of you. The Animals need heat and AC too. Just wanted to say we think you are the best.

-The Spot & Animal Coalition of Lake County

Wanted to let you and the owners know what a pleasure it has been to do business with Jonas Energy. You were able to schedule an appointment very quickly and John was able to assess our problem and gave us clear and precise information. Upon his return to the shop we received a call with a quote for the repair and then you called an scheduled the repair immediately. It just got better when Michael arrived. He was delightful, positive and got right to the job. Upon completion of the repair he checked the AC and of course it was much improved...

-Liz in Lower Lake

In Our Community...

Congratulations to our wonderful 4H kids!
You all did a great job at the Lake County Fair this year! We look forward to supporting you again next year. Keep up the great work!
Thank you Firefighters!
We just want to thank our wonderful Firefighters and everyone who is helping with the recovery efforts from the Valley Fire!
Jonas Sponsors Annual Catfish Derby
The annual Catfish Derby was held May 15-17th this year in Clearlake Oaks. This is a great event benefitting many local causes via the Clearlake Oaks-Glenhaven Business Association. Click here for more information.
Breast Cancer Awareness
According to the American Cancer Society, Breast Cancer is the most common cancer among women in the United States. You can take action today.
Click here to donate now.
The Clear Lake SPCA needs your help!
The SPCA of Clear Lake has lots of great animals looking for a home.
Why not bring one home today?

Recent Work We've Done

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Send Mail Correspondence to:

Jonas Energy Solutions

PO Box 277

Lower Lake, CA 95457


Visit our Showroom:

Jonas Energy Solutions

9125 Highway 53
Lower Lake, CA 95457

We'd love to hear your feedback. Please don't hesitate to call us, or use the form below to let us know how we're doing!


Our Promise to you...

We stand behind every service and product we sell.

We have been serving our community for over 40 years, and we have built a reputation that we are very proud of. Our goal is to maintain this reputation and build on it for years to come.

If for any reason you are not satisfied with our work or any product we sell, we will do whatever it takes to make you satisfied, including replacing it with an equal value system or removing your system and refunding 100% of your money.


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Current Specials

Fall Special: Get $25 off your tune-up!

It costs less to maintain your system in the fall. We will perform a full tune-up on your Monitor or Toyotomi heater, heat pump, electric or gas furnace, or water heater. Schedule your tune-up before the end of November and we will give you $25 off!

Call us today at (707) 994-5911 or click here to request a FREE estimate.


Let us know what you think...

Complete an American Standard Customer Survey.

Thank you for being our customer! If you recently purchased an American Standard heating or cooling system from Jonas, we'd like you to participate in this easy online survey. We want you to be 100% satisfied.

Click here to complete the survey!