Mizudo CS120S Tankless Water Heater Propane Gas 5.1 GPM 120,000 BTU New - FDG-CS120SBW-LP
This Mizudo tankless water heater is designed for outdoor installation. Powered by propane, it provides continuous hot water to multiple points through your home. The heat exchanger quickly heats the water to a maximum of 149°F, eliminating the wait for water to heat up. The bottom built-in forced DC fan eliminates the influence of external wind, ensuring stable combustion, safety, energy efficiency, and no pollution.
What our Experts Think
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Powerful on‑demand hot water delivers up to 5.1 GPM with 120,000 BTU capacity — strong enough for multiple fixtures simultaneously in typical homes.
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Propane gas fuel source offers flexibility where natural gas isn’t available or preferred.
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Tankless design means continuous hot water with no storage tank to heat or reheat.
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Outdoor‑ready construction with ¾″ NPT connections and wall‑mounted design saves indoor space.
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Precise temperature control maintains consistent output within a narrow range.
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Energy efficiency (UEF >0.81) helps reduce fuel waste compared with traditional tank heaters.
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Universal ¾″ connections simplify installation and compatibility with most plumbing setups.
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CSA certification ensures basic safety and performance standards for outdoor gas units.
Q&A
Q: What type of water heater is this?
A: A propane gas‑powered tankless water heater that delivers on‑demand hot water without a storage tank, saving space and energy compared to traditional tank systems.
Q: What is its hot water flow rate?
A: Up to 5.1 GPM (gallons per minute)—enough for multiple fixtures like showers, sinks, and appliances running simultaneously in many homes.
Q: How much heating power does it offer?
A: 120,000 BTU of heating capacity provides strong, consistent hot water delivery.
Q: What fuels this unit?
A: Designed for propane (LP) gas, ideal for homes without natural gas or with LP supply.
Q: What temperature range can it deliver?
A: Adjustable hot water from ~95°F to 149°F, letting you dial in comfortable water temperature.
Q: Where can it be installed?
A: Indoor wall‑mounted installation, compatible with standard venting and plumbing when installed per local codes.
Q: What are the benefits of a tankless design?
A: Provides instant, continuous hot water without waiting for a tank to heat up and generally offers higher energy efficiency and longer service life.
Q: Is it compact?
A: Yes — its space‑saving wall‑mounted design frees up floor space and is ideal for utility rooms, basements, and garages.
Maintenance Tips
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Annual descaling/flush: Flush the heat exchanger at least once a year with a descaling solution to remove mineral buildup and preserve flow rate and efficiency.
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Check gas connections: Inspect propane gas lines, fittings, and valves regularly for leaks or signs of wear; tighten or replace components as needed.
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Clean water filter/screens: Periodically remove and rinse inlet screens or filters to prevent clogs and maintain water flow.
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Vent inspection: Ensure venting and exhaust pathways are clear, secure, and free of debris for safe combustion and proper airflow.
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Monitor performance: Watch for temperature fluctuations, low flow, or error codes; address issues promptly, referring to the user manual.
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Exterior cleaning: Wipe the unit’s exterior with a soft, damp cloth; avoid abrasive cleaners that could damage surfaces.
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Professional servicing: Schedule yearly professional maintenance to check propane pressure, burners, and internal components for safe, reliable operation.
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