Mizudo 4.3 GPM Tankless Water Heater Indoor Propane Gas 100,000 BTU 120V New - FDG-CS100W-LP

The Mizudo indoor tankless water heater is a compact, efficient solution for small homes, apartments, and cabins, delivering 4.3 GPM of continuous hot water with 100,000 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

• 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.
• Propane gas fuel source offers flexibility where natural gas isn’t available or preferred.
• Tankless design means continuous hot water with no storage tank to heat or reheat.
• Outdoor‑ready construction with ¾″ NPT connections and wall‑mounted design saves indoor space.
• Precise temperature control maintains consistent output within a narrow range.
• Energy efficiency (UEF >0.81) helps reduce fuel waste compared with traditional tank heaters.
• Universal ¾″ connections simplify installation and compatibility with most plumbing setups.

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 once a year with a descaling solution to remove mineral and scale buildup and preserve flow efficiency.
• Check gas connections: Inspect propane gas lines, fittings, regulators, and valves periodically for leaks, corrosion, or loose connections; tighten or replace as needed.
• Clean water inlet filter/screens: Remove and rinse the inlet filter/screens regularly to prevent debris from reducing water flow. (General tankless practice)
• Ensure proper venting: Verify that vent pipes and exhaust paths are clear of obstructions for safe combustion and optimal performance.
• Monitor indicators: Pay attention to error codes, flame irregularities, or fluctuating temperatures; address issues promptly according to the user manual. (General tankless insight)
• Wipe exterior surfaces: Gently clean the outer unit with a soft, damp cloth; avoid abrasive cleaners that might damage coatings. (General home appliance care)
• Professional inspection: Schedule annual professional service to check propane pressure, burners, combustion safety features, and internal components for long‑term reliability. (Best practice)