Cloud 9 Heat & Air was awarded the 2025 Mitsubishi Diamond Contractor of the Year!
Cloud 9 Heat & Air was awarded the 2025 Mitsubishi Diamond Contractor of the Year!
A tankless water heater provides endless hot water without the energy waste of a traditional tank system. Whether you’re replacing an old water heater or installing tankless for the first time, our certified technicians ensure your system is sized correctly, installed safely, and optimized for long-term performance.
We specialize in tankless water heater installation for homes throughout Seattle and the surrounding Eastside. Our team handles everything from system selection and venting requirements to final testing and setup, ensuring your new tankless system runs efficiently from day one.
Choosing a tankless system means:
Hot water on demand — no waiting for a tank to refill
Lower monthly energy costs thanks to efficient heating
More space due to compact wall-mounted design
Longer equipment lifespan compared to tank-style heaters
Whether you need a gas tankless unit or electric tankless water heater installation, we make the process simple, safe, and stress-free. We provide honest recommendations, transparent pricing, and installation done right — the first time.
System sizing and unit selection guidance
Gas, electric, and venting configuration
Removal of old water heater (if replacing)
Safe installation and secure mounting
Temperature and performance testing
Instruction on system operation & maintenance
Energy-efficient tankless system installed for continuous hot water and reduced energy use — designed to fit your home and lifestyle.
Sleek, space-saving electric tankless systems professionally installed to deliver reliable hot water and smooth day-to-day use.
We specialize in residential AC installation, ensuring your home stays cool, comfortable, and efficient. Every installation is done by certified professionals using top-quality materials and equipment.
When repairs are no longer cost-effective, our AC replacement services provide a seamless upgrade to a modern system. Enjoy improved cooling power and lower operating costs.
Make your investment more affordable with available AC installation rebates and financing options. Our team helps you find local energy programs to save on upfront costs.
Trusted experts delivering reliable heating & cooling solutions for comfort in every season.
Our technicians are fully licensed, insured, and trained on the latest HVAC systems, for safe, code-compliant work.
We provide upfront, honest pricing with no hidden fees, ensuring you know the cost before work begins.
We stand behind every installation and repair, delivering quality workmanship you can trust.
Tankless units take up less space and can lower energy costs since they only heat water on demand, but they cost more upfront. Tank systems are usually cheaper to install and work fine for most households. We’ll help you weigh this based on your household size and hot water usage.
Most installs are completed in a single day, including removal of the old unit. Tankless installs can take a bit longer if new venting or gas lines are needed.
Signs include inconsistent hot water, rust colored water, unusual noises, or a tank older than 10 to 12 years. If you’re dealing with any of these, it’s worth getting it looked at before it fails completely.
They provide hot water on demand rather than a fixed tank supply, so you’re less likely to run out during back-to-back showers. Output still depends on the unit size and how many fixtures are running at once, which we size for during installation.
Yes. Every technician on our crew is licensed, insured, and trained on the brands we install. We’re also the 2025 Mitsubishi Diamond Contractor of the Year and an American Standard partner, credentials that reflect our standards across every service we offer, not just water heaters.
Diamond Rated status with Mitsubishi and a partnership with American Standard are certifications only a small number of contractors in the area hold. It’s part of why homeowners trust us for water heaters, not just heating and cooling.
At Cloud9 HVAC, we’re proud to bring reliable heating, cooling, and air quality services to homeowners throughout the Greater Seattle area. Whether you’re in Bellevue, Redmond, Bothell, or Kirkland, our certified technicians are ready to deliver comfort and care you can count on backed by integrity, expertise, and local experience.
