Mizudo CS120 Tankless Water Heater Propane Gas 5.1 GPM 120,000 BTU New - FDG-CS120BW-LP
The CS120 propane gas tankless water heater provides a compact and efficient solution for your home's hot water needs. With a maximum temperature of 149°F and a flow rate of up to 5.1 GPM for 40 minutes, this unit can supply nearly 300 gallons of hot water. Its precise temperature control ensures consistent comfort, adjustable from 95°F to 149°F. Designed for indoor installation, this tankless heater is compatible with most existing vents and pipes, making it an ideal choice for medium to smaller homes with 1-2 bathrooms.
What our Experts Think
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Instant hot water on demand
The Mizudo CS120 Tankless Water Heater Propane Gas 5.1 GPM 120,000 BTU New delivers continuous hot water without a storage tank — meaning no waiting for heat and more efficient fuel use compared with tank systems. It maintains up to ~5.1 GPM flow at 120,000 BTU for everyday household use.
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Strong, efficient propane performance
Running on propane gas, this unit offers powerful heating capacity that normally supports multiple fixtures (showers, sinks) simultaneously depending on inlet water temperature — ideal for homes with moderate hot water demand.
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Compact & space‑saving design
Its compact footprint and wall‑mount format save space compared to traditional tank heaters, making it a practical upgrade for garages, basements, or utility areas.
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Precise temperature control
Built‑in controls help maintain consistent hot water temperatures (typically 95–149 °F) with minimal fluctuation, enhancing comfort and safety.
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Durable & energy conscious
Certified for safety and energy performance, the heater’s UEF rating (over 0.81) reflects improved efficiency that can help reduce fuel costs over time.
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Straightforward installation
Standard 3/4″ NPT gas and water connections make it compatible with common plumbing setups — though professional installation is recommended to ensure correct venting and safe operation.
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Best for everyday residential use
Experts recommend this model for small‑to‑medium homes or auxiliary hot water supply, especially where tank space is limited or energy efficiency and continuous flow matter mos
Q&A
Q: What is the Mizudo CS120 Propane Tankless Water Heater (FDG‑CS120BW‑LP)?
A: A propane gas‑powered tankless water heater delivering continuous on‑demand hot water without a storage tank—compact and efficient for homes or outdoor installations.
Q: How much hot water can it deliver?
A: Provides up to 5.1 GPM (gallons per minute) at 120,000 BTU, enough for simultaneous use at multiple fixtures, like showers and faucets.
Q: What fuel type and installation does it support?
A: Runs on propane (LPG) and is designed for indoor or outdoor installation depending on model specifics and local codes.
Q: What’s the operating temperature range?
A: Adjustable from about 95 °F to 149 °F, offering precise temperature control for comfort.
Q: How efficient is this water heater?
A: It achieves a Uniform Energy Factor (UEF) over 0.81, meaning efficient gas usage compared to traditional tank heaters.
Q: What safety and compliance features are included?
A: CSA certified for safety compliance with standard 3/4″ NPT gas and water connections and computerized ignition control.
Q: Is professional installation recommended?
A: Yes — proper gas line, venting, and water connections should be handled by a licensed installer to ensure safe performance and code compliance.
Q: Why choose this tankless water heater?
A: Compact size saves space, provides endless hot water, offers strong flow performance for multiple fixtures, and reduces energy waste vs. traditional tanks.
Maintenance Tips
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Annual Flush & Descale: Flush the heater annually with a descaling solution to reduce mineral scale buildup in the heat exchanger — especially important if you have hard water.
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Check Gas & Water Lines: Periodically inspect all gas and water connections for leaks or corrosion; tighten fittings and address issues promptly.
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Clean Exterior: Wipe the exterior with a soft, damp cloth — avoid abrasive cleaners — to keep the unit free of dust and debris.
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Venting Inspection: Ensure proper venting and airflow if installed indoors; check for blockages, damage, or disconnections.
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Monitor Performance: Watch for erratic temperature, reduced flow, or error warnings — these may indicate mineral buildup or service needs.
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Professional Service: Have a licensed technician inspect and service the heater yearly to ensure safe, efficient operation.
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