Mizudo 3.6 GPM Tankless Water Heater Indoor Natural Gas 80,000 BTU 120V New - FDG-CS80W-NG

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

• Efficient tankless design delivers up to 3.6 GPM of continuous hot water with 80,000 BTU output — ideal for small households, apartments, cabins, or booster use.
• Compact indoor wall‑mounted unit saves significant space compared to traditional tank heaters (~¼ the size of a 50 gal tank).
• Natural gas fuel source offers reliable heating without electric element dependency, perfect for gas‑ready homes.
• Precise digital LED control lets you fine‑tune temperature with consistent output in the 95–149 °F range.
• CSA safety certification ensures trusted performance and adherence to safety standards.
• 3/4″ NPT water/gas connections and standard venting make installation compatible with most existing setups.
• UEF over 0.81 efficiency reduces energy waste compared to standard tank heaters.
• Simultaneous hot water delivery can serve 1–3 fixtures at once, depending on inlet temperature and flow demand.

Q&A

Q: What type of water heater is this?
A: A propane gas‑powered tankless water heater that delivers instant hot water on demand without a storage tank, saving space and energy versus traditional heaters.

Q: What is the hot water flow rate?
A: It provides up to 4.3 GPM (gallons per minute) of hot water, enough to supply 2–3 fixtures simultaneously depending on inlet water temperature.

Q: How much heating power does it have?
A: Features 100,000 BTU heating capacity for strong, continuous performance.

Q: What fuel does it use?
A: Designed for propane (LP) gas, making it suitable for homes without natural gas supply.

Q: Where can it be installed?
A: Indoor wall‑mounted installation with standard 3/4″ water and gas connections and 3″ power vent compatibility.

Q: How is temperature controlled?
A: Features a touch panel with LED display and precise temperature adjustment in a typical range of ~95 °F to ~149 °F.

Q: What safety and efficiency certifications does it have?
A: CSA certified with a UEF over 0.81, indicating efficient hot water delivery.

Q: What are the main benefits of its tankless design?
A: Provides continuous hot water on demand, space‑saving compact size, and reduced energy loss from standby heating common in tank models.

Maintenance Tips

• Annual descaling flush: Flush the heat exchanger at least once a year with a descaling solution to remove mineral scale and preserve hot water flow and efficiency. Tankless units benefit greatly from periodic flushing—even every 6–12 months depending on water hardness.
• Clean inlet filter/screens: If equipped, remove and rinse the cold‑water inlet filter regularly to prevent debris buildup that can restrict flow.
• Inspect gas and water connections: Periodically check natural gas lines, fittings, and water connections for leaks, corrosion, or loose fittings; tighten or replace components as needed.
• Verify venting: Ensure vent pipes and exhaust pathways are free of blockages and secure to maintain proper airflow and safe combustion.
• Monitor performance & error codes: Watch for temperature fluctuations, flow issues, or LED error codes; consult the manual or a pro promptly if irregularities occur.
• Clean exterior: Wipe the unit’s casing occasionally with a soft, damp cloth; avoid abrasive cleaners that could damage finishes.
• Professional inspection: Have a qualified technician inspect gas pressure, burner condition, and internal parts annually for reliable, long‑term operation.