Daniel did an excellent job handling our HVAC and mini-split maintenance. He thoroughly tested our furnace, AC, vents, and indoor units, and provided honest, practical recommendations for improvement. The next day, while installing a new thermostat, I discovered the C wire wasn’t working. Daniel promptly returned and fixed the issue at no additional charge. Highly recommended.

Daniel is very talented and experienced in almost all house repairs. He takes full ownership of the work and identifies any work that the house needs. Daniel provides full transparency on what needs to be done and provides different recommendations based on our needs. His quotes are very reasonable and he is very trust worthy. He also kindly agreed to fix the itty bitty things around the house for free of cost. Hire Daniel once, and you will see what I’m talking about!

Replaced an inadequate existing 48” range hood with a new 1800cfm(equivalent) Vent-a-hood model with makeup air. Did an absolutely fantastic job, quick/clear communication, fair pricing, great follow up and made every effort to ensure I was satisfied with the job performed. Highly recommended and would use again in a heartbeat.

You explain Daniel once what needs to be done, he goes beyond your expectations. God bless him.

January 2026 update: About a year ago we had Donso install a furnace (see below) which has been working out perfectly for us. At the time, they recommended installing insulation in our crawlspace which had never been done in our home built in the 60’s. We decided to go ahead with that and once again they did an excellent, 5 star job. They installed insulation under the floors (which are now noticeably warmer), rewrapped duct work and pipes with much better material and cleaned out all old, gross

I hired Daniel on his merits in his reviews, and he did not disappoint. He was communicative, professional, and dedicated. I highly recommend Donso Energy Solutions!

I am very happy that I hired Donso Energy Solutions for our Bellevue condo project! I needed 3 new wall heaters installed which required them to be hardwired per Bellevue City requirements! Also, the drywall needed to be cut and, walls patched and painted… Daniel and his crew were very efficient and I couldn’t be happier with the quality of their work! His price was reasonable compared to other estimates I received! He gives free estimates and is excellent at responding if you have any questions

Donso seems to be very reputable company. They are easy to deal with seem to be good guys. I hired them to replace the ductwork in my crawl space and they did a nice job. They came a bit later than I was expecting but completed the job a day earlier than expected so no problems. I would recommend them for any heating and cooling issues.