I recently had the pleasure of working with Simply Efficient Heating & Air Conditioning, LLC for the installation of a Mitsubishi HyperHeat 2 Ton Variable Speed Heat Pump in my home in Kirkland, WA. From the beginning to the end of the process, my experience was nothing short of exceptional, thanks to the professionalism, responsiveness, and expertise of Alex, Max, and Oleh. The team was very thorough in explaining the details of the installation, the benefits of the system, and the various rebates available to me, including the Energy Smart Eastside Rebate, Puget Sound Energy Rebate, and the Inflation Reduction Act Tax Credit. Their communication was clear and concise, addressing all my questions and concerns promptly. Even when there was a slight misunderstanding regarding the payment schedule, Esther from the team was quick to clarify and ensure everything was sorted out smoothly. The installation itself was completed with utmost care and professionalism. The technicians, led by Vlad, were punctual, courteous, and very knowledgeable. They went above and beyond to ensure that the system was installed correctly and efficiently, paying close attention to every detail. The craftsmanship warranty and the detailed explanation of how the system functions provided me with peace of mind knowing that I made the right investment in my home's comfort. Furthermore, the team's flexibility with the payment options and their willingness to accommodate my preference for ACH or check payments to avoid credit card fees were greatly appreciated. Their customer-first approach was evident in every interaction, from the scheduling of the inspection to the final transaction. In summary, my experience with Simply Efficient Heating & Air Conditioning, LLC was outstanding. Alex, Max, and Oleh, along with the rest of the team, demonstrated exceptional service and support throughout the entire process. I am extremely satisfied with the quality of the work and the level of customer service provided. I highly recommend them to anyone in need of heating and air conditioning services. A well-deserved 5-star review for a team that goes above and beyond for their customers. Thank you, Simply Efficient, for bringing comfort to our lives! read more

My husband and I have had the pleasure of working with both Adriel and Ester from Mayster Heating and Air, and we couldn't be more impressed with the experience from start to finish. Adriel is truly exceptional. He is professional, knowledgeable, and incredibly thorough with his work. He takes the time to explain what he's doing, answers every question with patience, and makes sure you understand how to keep your system running smoothly. He is efficient, respectful in the home, and maintains a level of care and cleanliness that really stands out. His positive attitude and friendly demeanor make the whole service experience stress-free! It's clear he takes pride in his work and goes above and beyond every time. Ester in the office is equally amazing. She is responsive, organized, and genuinely kind. She makes scheduling effortless and provides updates and communication that feel supportive and thoughtful. Every interaction with her has been smooth, professional, and reassuring. Between Adriel's outstanding service in the field and Ester's excellent coordination and customer care, Mayster Heating and Air continues to prove they are reliable, trustworthy, and committed to quality. We highly recommend them to anyone looking for honest, high-integrity HVAC service. We can't thank the Mayster team enough!!! -Alex and Travis read more

I am absolutely thrilled with the outstanding service I received from Simply Efficient for my recent HVAC installation. From beginning to end, their professionalism and attention to detail were exemplary. A special shoutout to David, whose integrity truly set this experience apart. David's honesty and transparency were evident at every step of the process. He provided clear, straightforward explanations of all the options and made sure I understood everything before making a decision. His genuine commitment to finding the best solution for my home, rather than just making a sale, was incredibly refreshing and greatly appreciated. The installation team, led by Alex, was equally exceptional. They arrived on time, worked efficiently, and left my home in perfect condition. The new HVAC system is operating flawlessly, and I'm already noticing a significant improvement in comfort and efficiency. If you're considering an HVAC upgrade, Simply Efficient is the way to go. With David's unwavering integrity and Alex's top-notch installation skills, you can trust you're receiving the best service available. I couldn't be happier with the results and highly recommend them to anyone looking for reliable and honest HVAC solutions! read more

I had the pleasure of having Adriel from Mayster Heating and Air service my A/C unit today (8/29/25), and I can honestly say he did an outstanding job. Adriel was incredibly thorough and meticulous with the maintenance, making sure every part was cleaned properly and explaining the process along the way. He even took the time to show me simple maintenance steps I can do myself to keep the system running smoothly between annual services. What really stood out was his professionalism, knowledge, and friendly demeanor. He made me feel comfortable asking questions, and I never once felt rushed. It's clear that Adriel and Mayster Heating and Air truly care about their customers and their work. I've been a customer of Mayster (formerly Simply Efficient) for a while now, and I can say without hesitation that I trust them completely. Their prices are reasonable, their customer service is top-notch, and the technicians are some of the best in the business. If you're looking for an ethical, high-integrity company with very reasonable rates that stands by its work, I highly recommend Mayster Heating and Air for all your A/C needs! Thank you Mayster Heating and Air, and Adriel!! Carrie F. read more

I highly recommend Mayster Heating & Air. They recently installed a new mini split system in my outdoor exercise room and replaced the refrigerant lines on my home's indoor system. Every step of the process was excellent. Esther in the office was professional, responsive, and compassionate, ensuring everything was scheduled smoothly. The technicians--Simeon, Sergey, Ilya, and Yuri--were on time, courteous, and performed flawless work that looks crisp and clean. David, the owner, sets the standard for the company by focusing on customer service and top-quality results. Their pricing is reasonable, and the fact that their work is warranted and guaranteed gave me total confidence. If you want an HVAC company that values professionalism, quality, and customer care, Mayster Heating & Air is the one to call. read more

My experience with Simply Efficient Heating and Air Conditioning has been very good. The staff at Simply Efficient are reliable, honest and operate with integrity. The owner David always answered my questions and provided me with all the options available for equipment and installation as well as for future maintenance. The installation of Mitsubishi heat pump went very well. The technicians did an excellent work installing the heat pump at our house! Alex and Yuri were on time, worked well together, were very knowledgeable and efficient doing their job. The team thoroughly cleaned up the area when they were finished. I highly recommend this company to others. read more

David and his team were incredible through the entire process of replacing our 30 year old furnace. I had no less than 12 contractors come out to bid the job, and chose Simply Efficient because they had the best price, were highly professional, and communicated flawlessly. The team was quick to respond and always on time. I enjoyed how they explained in detail what they were doing every step of the way and answered all my questions thoroughly. I can't recommend them enough. Thank you for making this experience painless, when it could have been anything but. read more

I cannot say enough good things about this company, its owner, or its employees. They have installed a new furnace in our old house for us, they installed an AC in a prior home for us, and they have now installed a heat pump as well as upgraded our ducting. Each time they have done so efficiently (as the name suggests), cost effectively, and they are all extremely skilled and hard working. I cannot recommend this team enough, particularly, their owner David Mayster and Alex and Andrey who helped us with our most recent installation. read more

From the service technician to the sales consultant (Tony) to the install (Daniil, Iuri, Kika) everything was fantastic. Professional, clean, efficient, I will refer Mayster to everyone I know. And I can't forget Esther. She was my first contact with the company. She's truly amazing. Just talking to her made me smile. These guys are the real deal. read more

We were waiting in the Edmonds ferry line for a long time then one vehicle cut and then this company car cut behind them. They showed a distinct lack of respect for everyone that's been waiting in the ferry line. If that's how they treat people on the road I wonder how they treat people they do business with. read more

Simon was amazing, came in did a diagnostic found out the issue and replaced my thermostat, he was very very respectful and courteous. I would hire this guys again in a heart beat and would recommend them. Great customer service and pricing is very reasonable. read more

We had a great conversation with Dimitri who walked us through our options and built us several detailed quotes to customize and choose from. the pricing was competitive, and we are now on the calendar for installation in a couple weeks! read more

Matt and Kalib were professional and caring. I had two issues with the impending install, and they went to great lengths to insure my concerns were addressed to my satisfaction. I will recommend Mayster in the future. read more

Heat pump replacement for oil furnace. Technicians especially Adriel did excellent timely work. Brandon insured our satisfaction, going beyond contractual obligations. We recommend Master without reservation. read more

10 out of 10 experience getting the AC serviced. They were quick to come out, Adriel explained what he was doing, quickly solved the problem and was very nice! He did a thorough job. Thank you!. read more

Our tech Artem was on time, professional & knowledgeable. Very easy to work with & we appreciated the timely reminder texts. Would highly recommend this company for HVAC work. read more

Dave and his team did multiple jobs for me. One of the best heating guys I know. They go beyond what is needed to get it done would highly recommend them to all my friends read more

They showed up on time and Helped to restore my Ac today as my wife is very sick. Thank you so much Mayster Heating & Air. You guys are valued and very appreciated!! read more

I had a wonderful experience with Mayster the came on time, were clean, answered any questions I had and gave me a great price on my system.