The Mizudo indoor tankless water heater is a compact, efficient solution for small homes, apartments, and cabins, delivering 3.6 GPM of continuous hot water with 80,000 BTU. Its sleek design includes a touch panel LED display, supports simultaneous water supply for
2 to 3 water points, and precise temperature control. The heater features an oxygen-free copper heat exchanger for durability, and a high-speed anti-backflow fan. With over 50% space savings compared to traditional heaters. Specifications include 120V power, and wall-mounted installation.
What our Experts Think
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Instant, on‑demand hot water
The Mizudo 3.6 GPM Tankless Water Heater Indoor Propane Gas 80,000 BTU 120 V New – FDG‑CS80W‑LP delivers continuous hot water without a storage tank, meaning no waiting and reduced standby energy loss compared with traditional tank heaters. Its 80,000 BTU output with up to ~3.6 GPM flow is well‑suited for small homes or single‑bathpoint setups.
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Compact, space‑saving design
At roughly 20.5″ × 13″ × 7″ with wall‑mounted installation, it takes up only a fraction of the footprint of conventional tanks — ideal for garages, laundry rooms, or tight utility spaces.
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Propane‑optimized performance
Running on propane gas with 120 V power, it efficiently heats water on demand and supports hot water at multiple points (tap + shower) depending on inlet temperature.
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Precise temperature control
Features an LED touch panel with accurate control over output temperatures (typically 95–149 °F) so you get consistent comfort without wide swings.
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Certified safety & protection features
CSA‑certified with overheat, dry combustion, anti‑scale, and flame failure protections, this unit is engineered for safer indoor operation.
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Easy connection & installation basics
Uses standard ¾″ NPT water and gas fittings and a 3″ power vent system compatible with typical tankless plumbing layouts — though professional install is highly recommended.
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Best for small homes or point‑of‑use needs
Experts recommend this model for small residences, apartments, cabins, or auxiliary setups where demand is moderate and space efficiency, steady hot water, and propane fuel flexibility matter.
Q&A
Q: What is the Mizudo 3.6 GPM Tankless Water Heater (FDG‑CS80W‑LP)?
A: A propane gas indoor tankless water heater that delivers hot water on demand without a storage tank—compact and efficient for residential use.
Q: How much hot water can it provide?
A: Up to 3.6 gallons per minute (GPM) with a propane 80,000 BTU heating capacity, suitable to serve about 1–3 hot water outlets depending on demand and inlet water temperature.
Q: Where can it be installed?
A: Designed for indoor wall‑mounted installation with standard 3/4″ NPT gas and water connections and a 3″ power vent system.
Q: What temperature range and controls does it have?
A: Electronic temperature controls typically allow adjustment from roughly 95 °F to 149 °F with precise LED panel settings.
Q: How efficient and safe is it?
A: With a Uniform Energy Factor (UEF) over 0.81, it achieves efficient hot water delivery, and CSA safety certification means it meets standard performance and safety requirements.
Q: What protection and durability features are included?
A: Built‑in protections like anti‑scale, anti‑freeze, overheat shut‑off, dry combustion protection, and a power vent fan help ensure reliable performance.
Q: Is professional installation recommended?
A: Yes — propane gas supply and venting should be installed by a licensed professional to ensure safety and code compliance.
Q: Why choose this unit?
A: It’s compact, space‑saving compared with traditional tank heaters, delivers instant hot water, and is suitable for apartments, condos, small homes, or as a booster unit when paired with other systems.
Maintenance Tips
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Annual Professional Inspection: Have a licensed technician service the heater yearly for gas safety checks, venting, combustion, and controls.
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Flush & Descale: At least once per year, flush the heat exchanger to remove mineral scale and maintain optimal water flow and efficiency (especially in hard‑water areas).
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Clean Inlet Filter: Remove and rinse the cold‑water inlet filter periodically to clear debris and protect internal components.
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Check Connections: Inspect propane gas lines, fittings, and water connections for leaks or wear; tighten or replace components as needed.
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Vent & Airflow Check: Ensure the venting system and air intake are clear of obstructions to support proper combustion and exhaust.
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Monitor Performance: Watch for temperature fluctuations, reduced flow, or error indications; address issues promptly to prevent larger problems.
