Physical Address
304 North Cardinal St.
Dorchester Center, MA 02124
APUS 190000 BTU Propane Tankless Water Heater Review: Pros & Cons
Introduction
If you’re in the market for a whole-home hot water solution that doesn’t eat up floor space, a tankless water heater is likely on your radar. Propane models are especially popular for homes without natural gas hookups, offering strong performance in outdoor installations. The APUS 190000 BTU propane tankless water heater review explores one such option: the APUS 190,000 BTU outdoor propane unit, which promises 8.1 gallons per minute (GPM) output, WiFi control, and enough capacity to run up to five outlets simultaneously.
This review is for homeowners, contractors, and DIY enthusiasts who want a balanced, data-driven look at what the APUS tankless water heater offers. We’ll examine its features, performance claims, pros and cons, and help you decide whether it’s the right choice for your property. No overblown claims—just the facts you need.
What Is the APUS 190000 BTU Propane Tankless Water Heater?
The APUS 190,000 BTU (model AP-AWH-W26LPG) is an outdoor, wall-mounted tankless water heater that runs on liquid propane. It’s designed to deliver continuous hot water on demand, eliminating the storage tank and standby heat loss you’d find in conventional units. With a maximum flow rate of 8.1 GPM and a temperature range of 95°F to 149°F, it aims to serve medium to large households needing hot water for up to three showers and two faucets at once.
This APUS tankless water heater review and rating targets anyone considering a propane-powered instant hot water solution for their home, vacation property, or rental unit. The unit is also compatible with the Tuya Smart app for remote temperature adjustment, adding a layer of convenience not always found in this price bracket.
Key Features & Specifications
Below is a breakdown of the most important features and specs as stated by the manufacturer. We present this information without independent verification; use it to compare with your needs.
| Feature | Specification |
|---|---|
| Power Source | Liquid Propane |
| Heat Output | 190,000 BTU |
| Flow Rate (max) | 8.1 GPM |
| Minimum Flow Rate | 0.79 GPM |
| Temperature Range | 95°F – 149°F |
| Temperature Stability | ±1°F |
| Controls | WiFi (Tuya App) + wired remote controller |
| Heat Exchanger Material | 100% oxygen-free copper |
| Efficiency Claim | 20% energy savings vs. conventional (manufacturer claim) |
| Dimensions (W×H×D) | 22.48 × 15.51 × 6.54 inches |
| Electrical Requirement | 120V AC (standard outlet) |
| Water & Gas Connections | 3/4 inch standard |
| Wind Resistance | 10-level rating |
| Anti-Freeze Protection | Electric freeze protection (specified) |
| Safety Features | Freeze, overheat, flame failure safeguards |
| Warranty | 2-year full warranty on components |
The unit’s compact footprint makes it suitable for outdoor wall mounting, freeing up indoor space. The APUS propane water heater review pros cons we explore below will help you weigh these specs against real-world expectations.
What’s Included in the Box
According to the manufacturer, the box contains:
- APUS tankless water heater (1 unit)
- Wired remote controller (optional) with 1 cable
- Screws (optional) and closed-circuit terminals (2 each)
- Expandable screw (1), wall anchors (6), mounting screws (4)
- Installation and owner’s manual
Setup requires connecting it to a 120V AC power source and standard 3/4-inch water and gas lines. Because this is an outdoor unit, you’ll need to plan for plumbing and gas line routing. The included remote controller can be mounted in a convenient indoor location if desired. The WiFi functionality works with the Tuya app, which you download to your smartphone.
How to Use
Setup
Professional installation is strongly recommended for any gas-powered water heater. The manual provides a step-by-step guide, but working with propane gas and water lines involves safety risks. The unit must be mounted on an exterior wall with proper clearances from windows and doors. Ensure the propane supply line is adequately sized for 190,000 BTU. Electrical connection requires a standard grounded 120V outlet.
Operation
Once installed, turn on the propane supply and power. The unit will automatically ignite when you open a hot water tap that exceeds the minimum flow rate of 0.79 GPM. You can adjust the outlet temperature using the wired remote or the Tuya app. The app allows scheduling and remote monitoring—useful for vacation homes or rental properties. The manufacturer claims ±1°F accuracy for stable water temperature.
Maintenance
Regular maintenance includes cleaning the air intake filter if applicable and checking for scale buildup in hard water areas. Descale the heat exchanger annually using a vinegar or a commercial solution. Also inspect venting and gas connections for leaks. The unit’s electric freeze protection helps prevent damage in cold climates, but the system should be drained if unused during freezing conditions.
Troubleshooting
Common issues include: no ignition (check propane supply, power, and filter), fluctuating temperature (clean the inlet filter, verify gas pressure), and error codes displayed on the controller. Refer to the manual for specific code meanings. If problems persist, contact APUS customer service under the 2-year warranty.
Performance & User Experience
The APUS tankless water heater is rated at 190,000 BTU for propane. In theory, this output can support a flow of 8.1 GPM at a moderate temperature rise (likely around 35°F). For colder incoming water, the flow rate may be lower. The APUS 8.1 GPM water heater review honest opinion should note that simultaneous use of three showers and two faucets is an optimistic scenario; actual performance depends on your ground water temperature and pipe sizing. Many users in milder climates report adequate performance for 2-3 simultaneous showers.
The WiFi control is a standout convenience, offering remote temperature adjustments. However, Smart home integration requires a stable 2.4 GHz Wi-Fi network. The built-in wind resistance (10-level) and electric anti-freeze protection are welcome features for outdoor installations in windy or cold regions.
Some user reviews (visible on Amazon) mention that the unit is quieter than expected for a tankless heater, while others note that the remote controller interface could be more intuitive. Overall, customer ratings show 4.3 out of 5 stars from 42 reviews at the time of writing, suggesting general satisfaction but with room for improvement in documentation and app connectivity.
For a more in-depth APUS 190000 BTU water heater review verdict, consider the trade-offs: strong heating capacity and smart features versus the need for professional installation and potential flow limitations in very cold climates.
Pros and Cons
Pros
- High BTU output (190,000) suitable for whole-home use with multiple simultaneous outlets.
- Compact design saves indoor space; outdoor mounting reduces safety risks.
- WiFi and remote control allow precise temperature adjustment from phone or wall panel.
- Low minimum flow rate (0.79 GPM) works with low water pressure homes.
- Advanced heat exchanger (oxygen-free copper) claims better efficiency and durability.
- Wind resistance and anti-freeze protection enhance reliability in harsh weather.
- 2-year warranty on components provides peace of mind.
Cons
- Requires professional installation due to gas and water line connections; not a true DIY project.
- Flow rate may drop significantly with cold incoming water (below 50°F).
- App stability sometimes reported as inconsistent by some users.
- Limited brand track record compared to established names like Rheem or Rinnai.
- Customer reviews are still relatively few (42), so long-term reliability data is sparse.
Comparison With Alternatives
To help you evaluate the APUS unit, here’s a comparison with two popular propane tankless water heaters in a similar class.
| Feature | APUS 190,000 BTU | Rheem RTEX-36 (electric) | Rinnai RL94i (gas) |
|---|---|---|---|
| Power Source | Propane | Electric | Propane / Natural Gas |
| BTU / kW | 190,000 BTU | 36 kW (123,000 BTU) | 180,000 BTU |
| Max GPM (at moderate rise) | 8.1 GPM | 5.3 GPM | 9.8 GPM |
| Installation Type | Outdoor only | Indoor | Indoor or outdoor |
| Controls | WiFi + wired remote | Digital thermostatic | WiFi + remote (optional) |
| Heat Exchanger | Oxygen-free copper | Copper | Stainless steel |
| Minimum Flow | 0.79 GPM | 0.5 GPM | 0.6 GPM |
| Warranty | 2 years | 1 year (parts), 5 years (tank) | 12 years (heat exchanger) |
The APUS offers competitive flow rate and smart features at a lower entry price (though we don’t quote prices). However, the Rinnai RL94i has a longer warranty and proven brand reputation. Electric units like the Rheem RTEX-36 are simpler but require a major electrical service upgrade for whole-home use. Choose based on your fuel preference, installation location, and budget.
For more context, the U.S. Department of Energy’s tankless water heater guide offers valuable efficiency insights.
Who Should Buy This Product?
Ideal Users
- Homeowners with existing propane supply seeking a whole-home hot water solution.
- Owners of vacation cabins or rental properties where remote temperature control via app is valuable.
- Those with outdoor wall space and willingness to hire a professional for gas and plumbing work.
- Households in moderate climates where incoming water temperature rarely falls below 50°F.
- Budget-conscious buyers who want smart features like WiFi control without paying premium prices.
Not Ideal for
- Homes without access to propane or natural gas (consider electric alternatives).
- Cold climate regions where ground water dips below 40°F—flow rate may be insufficient for multiple simultaneous uses.
- DIY installers without gas line experience; this is not a simple plug-and-play device.
- Those who prefer a brand with decades of market presence and extensive service network.
Expert Tips
- Check your groundwater temperature before purchase. Use the formula: (BTU × 1.0) ÷ (flow in GPM × 500) = temperature rise. For 190,000 BTU at 6 GPM, rise is about 63°F. If incoming water is 40°F, output is only 103°F—barely warm.
- Install a sediment filter on the incoming water line to protect the heat exchanger from debris and scale.
- Position the remote controller in the main bathroom or kitchen for quick adjustments without the app.
- Test the WiFi connectivity during installation; the Tuya app requires a solid 2.4 GHz signal.
- Flush the system annually with a descaling solution to maintain efficiency and warranty validity.
- Verify propane line size with a professional—190,000 BTU may require a 1/2-inch or larger line depending on distance.
Common Mistakes
- Undersizing the propane supply line. Use the manufacturer’s manual to calculate required pipe diameter and pressure.
- Mounting the unit in an unheated enclosed space without proper ventilation. The unit is rated for outdoor use only; indoor installation voids the warranty and creates safety hazards.
- Ignoring the minimum flow requirement. If you have low-flow fixtures, verify they draw at least 0.79 GPM or the heater may cycle on and off.
- Assuming maximum flow at all times. 8.1 GPM is only achievable at a minimal temperature rise. Real-world flow will be lower if you need hotter water.
- Skipping the manual. The installation manual includes critical gas pressure specs (typically 11 to 13 inches WC for propane). Failure to adjust can cause poor performance.
- Not checking local codes. Some areas require permits for gas water heater installation. Check with your municipality.
Where to Buy
The APUS 190,000 BTU Propane Tankless Water Heater is available through major online retailers, including Amazon. Buying from an authorized seller ensures you receive the full 2-year warranty and correct model. We do not list specific prices as they fluctuate; however, the unit is often sold with free shipping. Use the link below to view the current product page.
For comparative research, you may also check other retailers or the manufacturer’s own website for additional specifications.
Final Verdict
The APUS 190000 BTU propane tankless water heater review shows a capable, feature-rich unit that competes well in its category. Its 190,000 BTU output, WiFi control, and compact outdoor design make it an attractive option for homes with propane infrastructure. The 4.3-star average rating from early adopters suggests many users have had positive experiences, but the limited number of reviews means long-term reliability is still unproven.
If you value smart home integration and need whole-home capacity on a budget, the APUS is worth considering. However, for colder climates or those who prefer a brand with decades of service history, alternatives like the Rinnai RL94i may justify the higher upfront cost. Our APUS tankless water heater review and rating gives it a solid recommendation for the right buyer—provided you have a qualified installer and realistic expectations about flow rates in winter. It is truly a best value proposition in the tankless market at its price point.
Based on our analysis, we believe the is APUS tankless water heater worth buying question can be answered: yes, if you fit the ideal user profile described above. But always weigh the pros and cons against your specific situation.
FAQ
1. Can the APUS tankless water heater be used indoors?
No. The unit is designed for outdoor installation only. Using it indoors would create safety risks with combustion gases and void the warranty.
2. Does the heater work during a power outage?
It requires 120V AC power to operate its controls and fans. Without electricity, the unit will not ignite. Consider a backup power source if you need hot water during outages.
3. How many bathrooms can it support simultaneously?
In mild climates (incoming water ~60°F), it can likely handle two showers and one faucet simultaneously. With very cold water, one shower plus a sink may be the limit for comfortable hot water.
4. Does it work with a home generator?
Yes, as long as the generator provides stable 120V AC (pure sine wave preferred). The unit draws about 100-150 watts, so most portable generators can run it.
5. How often should I service the heater?
Manufacturer recommends yearly descaling and checking of gas connections. In hard water areas, descaling every six months may be necessary.
6. Is the Tuya app compatible with Alexa or Google Home?
Yes, Tuya devices typically integrate with both platforms through their respective skills and routines. Check the app for specific instructions.
7. What is the minimum gas pressure required?
For propane, the unit typically requires a manifold pressure of 11 inches water column (WC). The maximum allowable supply pressure is 13 inches WC. Your installer will verify this.
8. Can I install it myself to save money?
We strongly advise against DIY installation for gas appliances. Incorrect gas line sizing, venting, or electrical connections can lead to explosions, carbon monoxide poisoning, and voided warranty. Hire a licensed professional.
Stay Informed
Get the latest reviews, home improvement tips, and product comparisons delivered to your inbox. Join our newsletter today.
Affiliate Disclosure
HomeValueProducts.com is a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for sites to earn advertising fees by advertising and linking to Amazon.com. As an Amazon Associate, we earn from qualifying purchases. This does not affect the price you pay. All opinions expressed here are based on our research and analysis.
