Mistake: buying a bulky tank when a propane tankless water heater can deliver instant hot water for 2 showers plus 1 sink without taking up garage space. The APUS Indoor 95,000 BTU unit hits up to 4.42 GPM and even wakes at tiny flows thanks to a 0.66 GPM low-flow start.
Compact, space gray, and designed for indoor installation with a smart digital display, it replaces wasted waiting time with stable temperatures and steady flow. Ready to stop cold surprises in the middle of a shower?
Key Features & Real-World Use
- High heating capacity – 95,000 BTU handles multiple fixtures, so two showers plus a sink can run without big temperature drops.
- Fast flow – Up to 4.42 GPM keeps the stream strong for filling tubs or simultaneous use; 0.66 GPM low-flow start means the unit fires for small tasks too.
- Smart digital display – Easy temperature control and diagnostics at a glance; useful for tuning comfort and spotting scale or sensor alerts.
- Indoor, space-saving form – Space gray compact casing fits utility rooms and tight closets; pairs with typical venting kits and a propane regulator.
- Durability & maintenance – Designed for regular in-line filter and descaling service; routine maintenance helps prevent mineral buildup and prolongs the heat exchanger life.
Everyday benefits: consistent hot water for showers, sinks, and appliances, less standby heat loss than tanks, and a cleaner footprint in small utility spaces. Accessories like a gas line flex connector, venting kit, and water filter are common add-ons for reliable performance.
How to Choose
Pick a unit that matches your household needs. Key criteria:
- Capacity vs. demand – Compare GPM to the number of simultaneous fixtures. The APUS 4.42 GPM suits 2 showers + 1 sink usage.
- Fuel & supply – Confirm propane availability and regulator sizing; a proper gas line prevents pressure drops at peak BTU loads.
- Venting & location – Indoor models need correct exhaust and clearances. Decide between direct-vent kits or existing chimney options.
- Maintenance needs – Hard water requires filters and periodic descaling to protect the heat exchanger and sensors.
- Controls & safety – Digital displays, temperature limits, and flame sensors improve convenience and reduce scald risk.
From Box to Daily Use
- Verify your propane supply and install a certified regulator and gas shutoff valve.
- Mount the unit on a grounded, indoor wall with the required clearances for venting.
- Install exhaust piping per local code or use the recommended venting kit to manage condensation and exhaust.
- Connect cold and hot water lines, add a sediment filter if you have hard water, and flush the system.
- Power up, set the digital temperature, run each fixture to confirm flow and stable temperature, then register the unit for warranty.
Buyer Doubts Solved
Is propane safe indoors? Yes, when installed by a licensed technician with proper venting, gas lines, and carbon monoxide detection.
Will it work in cold climates? With correct piping, insulation, and occasional maintenance to avoid freezing and condensation, performance remains steady.
Is installation hard? DIY is possible for experienced DIYers, but most homeowners hire a pro for gas hookup and venting to meet code and warranty terms.
What about scale and corrosion? Regular simple maintenance – a scale flush and inline filter – keeps heat exchanger life longer and sensors accurate.
Will it be noisy? Modern units have modest combustion noise; mounting location and isolation pads reduce transmission into living spaces.
Swap delay and wasted water for dependable, on-demand hot water. The APUS propane tankless water heater packs 95,000 BTU, a smart display, and compact indoor fit for busy households—upgrade today for steadier showers and simpler maintenance.
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