Get matched with top central humidifier installers and replacers in Mercer Island, WA

"All went according to plan. Justin (hope I remember that right) was promptly at my home on Saturday morning. He explained what he was going to do (check the furnace) and verify operation (he found two contactors/relays that were starting to age and recommended replacement soon.) After doing the furnace checkout, he proceeded to get ready to go under the house. We laid out a large covercloth to prevent dirt on the carpet and down he went. All said and done he had the main bedroom vent open (it was jammed by the vent cleaning company) and provided me an option on the air leak. The technician Justin was friendly, explained things completely, was always respectful of my home and me, and was a pleasure to have do the work. He obviously knew his job and completely answered all my questions."

"Our old gas furnace died during the series of snowstorms in February. Stephan came out the day after we called, to give us the bad news that the unit was so old, no replacement parts were available so the whole thing would have to be replaced. Not really surprising given the age of the unit. He also showed me where the water heater (of similar vintage) was corroding around the outlet pipe, so was also in need of replacement. Kris came out within a couple of hours to look over the house and recommended a couple of options. We were leaving town so installation was delayed a couple of days; otherwise we could have had everything done within 48hours of the initial call. The crew that showed up to do the installation (sorry I forgot your names) showed up promptly at 8AM, worked throughout the day, and left our basement cleaner than it started out."

"I purchased a new Navien NPE-240A2 Tankless Water Heater and had it installed. I'm loving the new water heater. It replaces an old Noritz tankless that died just before this installation. The on-site estimate was what sold me. Ken went through all the details and answered a lot of questions from me. Zachary came out with Austin and performed the installation just like I discussed with Ken. Zachary kept me in the loop throughout the installation to ensure I was in agreement with how it was going. Zachary always had my interest at heart and ensured no corners were cut. The installation is much cleaner, and more correct than the previous tankless company did. Zachary even listened to my concern about the astectics of the exterior exhaust and quickly found an easier and cleaner looking way to address my concern. He also removed an old recirculation pump and replaced a new main house shutoff valve. The entire area was treated respectfully and left cleaner than they found it."

"Mark and his guys helped us install a new AC last summer. They arrived on time and did a great job! So when I was looking for someone to do the maintenance of our furnace, I called them. Todd went above and beyond my expectations. He finished the job and even helped fix my hinge. Both Mark and Todd strike me as very genuine people. And I would definitely hire them again!"

"Evergreen installed a new hybrid heat pump system in my house. After researching the options, Evergreen was not only the most reasonable price, but they also scoped out a hybrid system where they would install new duct work and a single air exchanger in the attic and a minisplit in the basement. Scott, the sales person, did not try to upsell me on number of zones (others tried to get me to get 2 units in the basement) and after 2 months with the system, the single unit in the basement is heating the whole basement to our needs. All this was done at a price still considerably lower than the "standard" system price being offered by one of the bigger, similarly named companies. Evergreen was also the only company to propose a hybrid system where they would install a single exchanger in the attic and run new ceiling ducts to the rooms. This was appealing because we don't need to have the cassettes in each room and we didn't need to line the outside of the house with conduit for the cassettes (also the bathroom gets heat, too). Scott was great to work with, answered all my questions, and did his best to size the system correctly. Installation was smooth. There was a small hiccup where the installer accidentally broke a basement window, but Evergreen squared it away. Don and his team were great and the inspections passed. After install support has been great. Denise has been responsive to my questions. Overall, the experience was great with Evergreen and I highly recommend them."

"Our furnace died overnight and AirPros came to the rescue. They were able to send someone to diagnose/repair within an hour of my initial phone call. Just as impressive, they juggled their non-emergent service schedule to install our new furnace less than 48 hours after that initial call. They even credited the cost of the first visit towards the cost of the second. Absolutely fantastic in a really unpleasant situation--I know who I'll be calling for planned maintenance! (Pro tip: they do charge a 3% service fee for credit card payments over $1000--wish I'd known ahead of time.)"

"Cory and the whole team answered all my questions during the estimate & installation, were responsive and professional throughout the process, and delivered the new heat pump system on schedule & on budget despite the supply chain uncertainties. I really appreciate that they presented me with options and helped me to make an informed decision, with no high pressure sales or unnecessary add-ons, as well. I couldn’t be happier with my new heat pump system."

"I purchased a HeatPump system for my house but there was some issue after the installation. After a few times troubleshooting, NW helped to find and fix the issue. Glad that they are persistence in troubleshooting for their customers."

"Professional and thorough! Got my leaking water heater replaced pretty quickly!"

At One Hour Heating and Air Conditioning, we keep homes comfortable year-round with honest recommendations, neat workmanship, and fast response times. Our licensed, insured technicians service all major HVAC brands, and every job is backed by clear pricing and strong warranties. Whether it's a quick repair, a full system replacement, or indoor air quality upgrades, we make it easy—from first call to final clean-up.