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.
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A tankless water heater provides hot water on demand without storing water in a tank. It heats water instantly as it flows through the system.
Most installations are completed in 3–6 hours, depending on the model and your home’s plumbing or gas line setup.
Yes, tankless systems only heat water when needed, helping reduce energy waste and lowering utility bills.
Yes, when properly sized. We help you choose a unit that fits your family’s hot water needs.
Yes, we install both types depending on your home’s requirements and energy preferences.
Yes, annual maintenance helps prevent scale buildup and keeps your system running efficiently and reliably.
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.
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