68,000 BTU vs 199,000 BTU Tankless Water Heaters in 2026: Key Differences
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The 68000 btu vs 199000 btu tankless water heater comparison highlights two distinct propane solutions. Both units provide endless hot water and carry CSA safety certifications. They differ primarily in scale and application. The APUS model targets compact RV spaces with low power needs. The Westinghouse unit serves large homes with high flow demands. Your choice depends on whether you need mobile efficiency or whole-house capacity.
Key differences
| Aspect | APUS 68,000 BTU RV Propane Water Heater | Westinghouse 9.2 GPM Propane Indoor Tankless Heater |
|---|---|---|
| BTU Output | 68,000 BTU | 199,000 BTU |
| Flow Rate | 3.9 GPM | 9.2 GPM |
| Installation Location | RV/Outdoor | Indoor |
| Voltage | 12V DC | 120V AC |
| Dimensions | 14.96 x 14.96 x 14.18 in | 24.8 x 15.9 x 15.9 in |
Which one should you choose?
Choose APUS 68,000 BTU RV Propane Water Heater if
- You need a compact unit that fits standard RV water heater compartments.
- You require 12V DC power compatibility for off-grid or mobile use.
- You only need hot water for one or two fixtures simultaneously.
Choose Westinghouse 9.2 GPM Propane Indoor Tankless Heater if
- You need to supply hot water to four or more bathrooms at once.
- You want precise temperature stability within ±1.8°F for comfort.
- You have a 120V AC power source and space for a larger indoor unit.
Verdict: Choose the APUS 68,000 BTU model if you are outfitting an RV or camper where space and low power draw are critical. Select the Westinghouse 199,000 BTU unit if you need high-volume hot water for a large residential home. The decision rests on your power source and daily water usage needs.
RV vs Whole-Home Propane Heaters
Flow Rate Capacity
The Westinghouse unit delivers significantly higher flow rates for large households. Its key specs list 9.2 GPM, while the feature section mentions up to 10.3 GPM for whole-home performance. This supports simultaneous use in four or more bathrooms. The APUS RV heater offers 3.9 GPM. This lower flow is designed for compact RV showers and sinks. It starts functioning at just 0.55 GPM. You get endless hot water in both cases. However, the Westinghouse handles high-demand residential tasks better. The APUS is sufficient for single-point RV use. Choose Westinghouse for whole-home needs. Pick APUS for mobile or small-space living.
Installation Location
These heaters serve different environments based on their design. The Westinghouse model is explicitly rated for indoor installation. It is built for residential spaces with proper venting. The APUS unit is designed for RV compartments. It fits standard 12.6 x 12.6 inch cutouts in campers. It replaces traditional 6 to 12-gallon tank heaters in trailers. The APUS includes a white or black access door to match RV exteriors. You cannot install the Westinghouse in an RV space due to its size. The APUS is not intended for permanent indoor home use. Location dictates your choice. Use Westinghouse for houses. Use APUS for vehicles.
Voltage Requirements
Power sources differ between these two propane heaters. The APUS RV heater operates on 12V DC power. This matches standard RV electrical systems. It allows easy integration with camper batteries or converters. The Westinghouse heater requires a 120V AC power source. This is standard for residential household outlets. You need a dedicated circuit in your home. The Westinghouse uses this power for its self-modulating technology and safety controls. The APUS uses it for its intelligent combustion and freeze protection. You cannot swap power sources. Check your available power before buying. AC is for homes. DC is for RVs.
Temperature Stability
The Westinghouse heater offers precise temperature control for comfort. It maintains stability within ±1.8°F using advanced self-modulating technology. This adjusts water flow automatically to prevent cold bursts. You get spa-like consistency during showers. The APUS heater uses intelligent staged combustion. It adjusts heating based on incoming water temperature and flow. It maintains a comfortable outlet range of 95–124°F. It does not specify a ±1.8°F stability metric. Both provide endless hot water. However, the Westinghouse technology minimizes fluctuations more effectively. If stable temperature is critical, Westinghouse has the edge. The APUS is reliable for general RV use.
Freeze Protection
Both units include freeze protection, but ratings vary. The APUS heater activates automatically at 35.6°F (2°C). This helps prevent freezing damage when properly powered. It is suitable for mountain campsites and cold weather travel. The Westinghouse heater offers integrated freeze protection down to -13°F. This is a more robust rating for extreme residential winters. It also requires draining the system below 5°F or during non-use. Both designs protect internal components. The Westinghouse handles colder ambient temperatures better. The APUS is adequate for typical RV camping conditions. Check your local climate. Extreme cold favors Westinghouse. Mild cold works for APUS.
Which unit fits your hot water needs
RV owners with compact water heater spaces
This APUS unit measures 14.96 by 14.96 by 14.18 inches, fitting standard RV compartments. It runs on 12V DC power, ideal for camper electrical systems. The 68,000 BTU burner provides 3.9 GPM, sufficient for single-fixture use. Its compact design replaces traditional tank heaters in travel trailers and motorhomes without complex modifications.
Homeowners needing high flow for multiple bathrooms
The Westinghouse model delivers up to 10.3 GPM at 199,000 BTU, supporting four or more bathrooms. Its 120V AC power suits residential circuits. The unit maintains temperature stability within ±1.8°F during use. This capacity ensures consistent pressure and comfort for simultaneous showers, laundry, and kitchen tasks in larger households.
Campers requiring freeze protection at high altitudes
This heater operates reliably at elevations up to 9,800 feet. It includes intelligent freeze protection that activates at 35.6°F to prevent damage. The unit starts with as low as 0.55 GPM, ensuring ignition even in low-flow scenarios. These features make it suitable for mountain camping and variable weather conditions.
Users seeking precise temperature control for comfort
This Westinghouse unit features advanced self-modulating technology to adjust flow automatically. It keeps water temperature stable within ±1.8°F, reducing fluctuations. The 6-stage combustion system optimizes energy use based on demand. This precision provides spa-like comfort and minimizes cold bursts during daily showers and household water usage.
Quick picks
| # | Product | Best for | Price |
|---|---|---|---|
| 1 | APUS 68,000 BTU RV Propane Water Heater | Standard RV water heater compartments | Check price of APUS 68,000 BTU RV Propane Water Heater on Amazon |
| 2 | Westinghouse 9.2 GPM Propane Indoor Tankless Heater | large indoor homes with high hot water demand | Check price of Westinghouse 9.2 GPM Propane Indoor Tankless Heater on Amazon |
The products compared
APUS 68,000 BTU RV Propane Water Heater
Best for: Standard RV water heater compartments
- BTU
- 68,000 BTU (what this guide is about)
- Fuel Type
- Propane
- Flow Rate
- 3.9 GPM
- Voltage
- 12V DC
- Certification
- CSA
- Dimensions
- 14.96 x 14.96 x 14.18 inches
View on Amazon: APUS 68,000 BTU RV Propane Water Heater Affiliate link
This APUS unit delivers 68,000 BTU of propane heat for RV use. It provides up to 3.9 GPM of hot water and fits standard 12x12 inch compartments. The 12V DC system includes a remote control for indoor adjustments. It operates at elevations up to 9,800 feet and features intelligent freeze protection. This heater replaces smaller tank models in travel trailers and motorhomes.
Pros
- 68,000 BTU propane burner for continuous hot water
- 3.9 GPM flow rate for reliable shower performance
- Compact 14.96-inch square design fits standard RV openings
- Includes remote control for indoor temperature adjustment
- CSA certified with flame failure and dry-burn protection
Cons
- Lower 68,000 BTU output compared to 199,000 BTU models
- 3.9 GPM flow rate limits simultaneous multi-fixture use
- 24-pound weight requires secure mounting in RVs
Good fit if
- You need a direct replacement for a 6-12 gallon tank in an RV
- You prioritize compact dimensions that fit standard 12x12 inch cutouts
- You require a remote control for convenient temperature management
Skip if
- You need high flow rates exceeding 3.9 GPM
- You require indoor residential heating with 199,000 BTU output
- You prefer a black access door over the white option
Verdict: APUS 68,000 BTU RV Propane Heater suits RV owners who need a compact, CSA-certified replacement for small tank heaters with remote convenience.
Westinghouse 9.2 GPM Propane Indoor Tankless Heater
Best for: large indoor homes with high hot water demand
- BTU
- 199,000 BTU (what this guide is about)
- Fuel Type
- Propane
- Flow Rate
- Up to 10.3 GPM
- Installation Location
- Indoor
- Voltage
- 120V AC
- Temperature Control
- 95-149°F, ±1.8°F
View on Amazon: Westinghouse 9.2 GPM Propane Indoor Tankless Heater Affiliate link
This Westinghouse unit delivers 199,000 BTU and 9.2 GPM for whole-home hot water. It maintains temperature within ±1.8°F using self-modulating technology. The propane heater fits indoor spaces, measuring 24.8 x 15.9 x 15.9 inches. It includes freeze protection down to -13°F and requires a 120V power source. This model suits large households needing high flow rates for multiple bathrooms.
Pros
- 199,000 BTU output for high demand
- 9.2 GPM flow rate for multiple fixtures
- Precise ±1.8°F temperature stability
- Freeze protection down to -13°F
Cons
- Limited to indoor installation only
- Requires 120V AC electrical connection
- Weighs 56.7 pounds, adding installation weight
Good fit if
- You need continuous hot water for 4+ bathrooms
- You require precise temperature control within ±1.8°F
- You have an indoor space for a propane unit
Skip if
- You need outdoor installation capability
- You lack a 120V power source nearby
- You prefer natural gas over propane
Verdict: Westinghouse 199,000 BTU Propane Indoor Heater fits large homes requiring high flow and precise temperature stability. It is ideal for indoor setups where propane is available and electrical power is present.
Specifications side by side
| Spec | APUS 68,000 BTU RV Propane Water Heater | Westinghouse 9.2 GPM Propane Indoor Tankless Heater |
|---|---|---|
| Fuel Type | Propane | Propane |
| Flow Rate | 3.9 GPM | Up to 10.3 GPM |
| BTU | 68,000 BTU | 199,000 BTU |
| Installation Location | not stated | Indoor |
| Voltage | 12V DC | 120V AC |
| Temperature Control | not stated | 95-149°F, ±1.8°F |
| Certification | CSA | CSA |
| Dimensions | 14.96 x 14.96 x 14.18 inches | 24.8 x 15.9 x 15.9 inches |
| Use | RV | Whole House |
| Features | not stated | WiFi |
| Weight | 24 pounds | 56.7 pounds |
| Color | White | Grey 103PI |
| Model | AP-AWH-RV10W-NEW | HW199A0G-LP |
Frequently asked questions
Can I use a 199,000 BTU heater in my RV?
No, the 199,000 BTU Westinghouse unit is designed for indoor whole-home use. It measures 24.8 inches tall and weighs 56.7 pounds, making it too large for standard RV compartments. The APUS 68,000 BTU model is the correct choice for RVs, as it fits compact spaces and runs on 12V DC power.
What is the size difference between these two propane heaters?
The 68,000 BTU APUS heater is compact, measuring 14.2 inches wide and 15 inches tall. It weighs only 24 pounds. The 199,000 BTU Westinghouse unit is significantly larger, standing 24.8 inches tall and weighing 56.7 pounds. The smaller unit is built for tight RV bays, while the larger one suits fixed indoor installations.
Do both heaters run on propane fuel?
Yes, both units operate on propane. The APUS model is a propane RV water heater, while the Westinghouse unit is a propane indoor tankless heater. Both require a propane supply line. The Westinghouse model also requires electrical power for operation, whereas the APUS unit draws 12V DC power suitable for RV systems.
Which heater is better for a large family home?
The 199,000 BTU Westinghouse heater is better for large homes. It delivers up to 10.3 GPM for whole-home performance. This high flow rate supports simultaneous use in four or more bathrooms. The 68,000 BTU APUS unit is too small for whole-house demands and is intended only for compact RV applications.
Is the 68,000 BTU unit CSA certified?
Yes, the APUS 68,000 BTU RV Propane Heater carries CSA certification. This safety certification is crucial for RV water heaters. The guide notes that both units provide endless hot water and carry CSA safety certifications, ensuring they meet standard safety requirements for their respective installations.
How much space does the Westinghouse heater require?
The Westinghouse 199,000 BTU heater requires a footprint of 15.9 inches by 15.9 inches. It stands 24.8 inches tall. You need an indoor location with propane access and electrical power. Its larger size and weight make it unsuitable for mobile RV setups, which require the smaller APUS model.