When you’re traveling or living in an RV, hot water is a luxury that can make life much easier. Many RV owners are switching from traditional tank water heaters to tankless water heaters because they save space, heat water faster, and use energy more efficiently. One popular option is the Apus RV tankless water heater. But before you buy, you probably want to know: How much water does the Apus RV tankless water heater produce per minute? Let’s dive deep into this question, and cover everything you need to know about Apus performance, practical usage, and how its flow rate compares to other models.
Understanding Tankless Water Heater Flow Rate
Before looking at Apus specifically, it’s important to understand what flow rate means for tankless water heaters. The flow rate is the amount of hot water the heater can deliver per minute. It’s usually measured in gallons per minute (GPM). This number is crucial because it tells you how many appliances or fixtures can use hot water at the same time.
For example, if your shower uses 2 GPM and your kitchen sink uses 1 GPM, you need a heater that produces at least 3 GPM to run both at once. If the flow rate is too low, water might not be hot enough, or you may run out of hot water during heavy use.
Apus Rv Tankless Water Heater: Key Specifications
The Apus RV tankless water heater is designed for mobile living. It’s built to save space, provide instant hot water, and perform well even when moving. Let’s look at its main specifications:
- Typical flow rate: 2.5 to 3.5 GPM, depending on water temperature and pressure
- Heating power: 42,000 BTU (British Thermal Units) per hour
- Energy source: Propane gas
- Water pressure range: 10–150 PSI
- Dimensions: Compact, fits standard RV cutouts
- Installation: Designed for DIY or professional installation
Most Apus models produce 2.5 GPM at average incoming water temperatures (around 50°F). If the incoming water is warmer (like in summer), the flow rate can reach up to 3.5 GPM. In cold climates, the flow rate drops because the heater needs more time to warm colder water.
How Much Hot Water Does Apus Produce Per Minute?
The actual hot water output per minute depends on several factors. Let’s break them down:
- Incoming water temperature: Colder water requires more energy to heat, so the flow rate goes down.
- Water pressure: Low pressure reduces output. RVs often have variable pressure.
- Set temperature: The higher you set the temperature, the lower the flow rate.
Here’s what you can expect in real-world use:
- Average RV conditions (50°F incoming water): 2.5 GPM
- Warm climates (65°F incoming water): Up to 3.5 GPM
- Cold climates (40°F incoming water): Around 2.0 GPM
Practical Example
Imagine you’re parked at a campground in spring. Your incoming water is 55°F. You set the heater to 120°F. The Apus model produces about 2.7 GPM. This is enough for one shower and one faucet at the same time, but probably not two showers.
Comparing Apus Flow Rate To Other Rv Tankless Water Heaters
To put Apus in context, let’s compare it with other popular RV tankless water heaters. Below is a table showing common models and their flow rates:
| Brand & Model | Max Flow Rate (GPM) | Heating Power (BTU/hr) | Typical Use |
|---|---|---|---|
| Apus RV Tankless | 2.5–3.5 | 42,000 | Small families, 1 shower + 1 sink |
| Girard GSWH-2 | 2.4–3.0 | 42,000 | Single shower use |
| Suburban IW60 | 2.7–3.5 | 60,000 | Multiple fixtures, larger RVs |
| Truma AquaGo | 2.5 | 60,000 | Luxury RVs, fast heating |
| EcoSmart ECO 11 | 2.0 | 27,000 | Small RVs, backup heater |
As you can see, Apus is competitive in its range. It’s not the highest, but more than enough for most RV uses.
Real-world Usage: What Can You Run At Once?
Knowing the flow rate is just half the story. You need to know if Apus can handle daily tasks. Here’s a quick rundown of common RV fixtures and their average water usage:
- Shower: 2.0–2.5 GPM
- Kitchen sink: 1.0–1.5 GPM
- Bathroom sink: 0.5–1.0 GPM
- Washing machine: 1.5–2.0 GPM
With Apus at 2.5–3.5 GPM, you can:
- Run one shower and a sink at the same time comfortably
- Run two sinks, or a sink and a washing machine
- For two showers, you may need to stagger usage
Example Scenario
If two people want to shower at the same time, the water heater may drop the temperature, or reduce flow. In practice, RV owners often schedule showers and washing separately.
Factors That Affect Apus Water Output
No tankless water heater gives exactly the same GPM all the time. Several factors can influence the output per minute:
1. Incoming Water Temperature
If you’re camping in a cold area, the water coming in may be 40°F. Apus needs more energy to heat this water, so the flow rate drops. In hot climates, the heater works faster and produces more GPM.
2. Water Pressure
RV water systems are often less powerful than home plumbing. If your RV has low water pressure (below 40 PSI), the flow rate may drop to 2 GPM. If pressure is high (above 80 PSI), you get maximum output.
3. Propane Supply
Apus uses propane gas to heat water. If your propane tank is low or clogged, the heater cannot perform at its best. Always check propane levels before long trips.
4. Heater Settings
Setting the heater to a very high temperature (like 130°F) may reduce the flow rate. Most RV owners use 120°F, which is a good balance between comfort and efficiency.
5. Altitude
This is a detail many beginners miss: at high altitudes, propane heaters lose efficiency. If you’re in the mountains, expect a small drop in GPM output.
Installation And Maintenance: Impact On Performance
The way you install and maintain your Apus tankless water heater can influence how much water it produces per minute.
Proper Installation
- Make sure the water lines are the right size (usually ½ inch for RVs)
- Check for leaks, as even small leaks can lower pressure and flow
- Install in a well-ventilated area to prevent overheating
Regular Maintenance
- Clean the filter monthly to avoid clogs
- Flush the heater every season to remove mineral buildup
- Test propane lines and valves for safety
Neglecting maintenance can reduce the flow rate and cause other issues. Many RV owners underestimate how quickly mineral deposits build up, especially in hard water areas.
Apus Flow Rate In Different Seasons
Seasonal changes affect water heater performance. Here’s a summary of how Apus output varies:
| Season | Average Incoming Water Temp (°F) | Apus Output (GPM) | Notes |
|---|---|---|---|
| Winter | 40 | 2.0 | Lower performance, may need to stagger usage |
| Spring | 55 | 2.7 | Good for single shower + sink |
| Summer | 65 | 3.5 | Best performance, multiple fixtures possible |
| Fall | 50 | 2.5 | Standard use, watch propane levels |
Tip: If you travel between climates, adjust your expectations and plan water usage accordingly.
Energy Efficiency Vs. Flow Rate
Many RV owners wonder: does a higher flow rate mean higher energy use? The answer is yes, but Apus is designed to balance efficiency and performance.
- Higher GPM: More water heated, more propane used
- Lower GPM: Less energy, slower heating
Apus uses advanced sensors to adjust burner power based on demand. If you only run a sink, it uses less propane. If you turn on multiple fixtures, it increases output. This helps save energy and avoid waste.
Common Mistakes Rv Owners Make
Many beginners make mistakes that reduce the performance of their tankless water heater. Here are two mistakes most people don’t realize:
- Ignoring water pressure: Low RV water pressure can cut the flow rate in half. Always check your pressure regulator and use a quality RV pump.
- Setting temperature too high: If you set the heater to 140°F, you may get less hot water per minute. Stick to 120°F for best balance.
Another issue is failing to clean the filter or flush the heater regularly. Mineral buildup can block the heat exchanger, lowering GPM.
Apus Flow Rate: Ideal Users
The Apus RV tankless water heater is best for:
- Small to medium RVs
- Couples or families of 2–3
- Owners who want instant hot water
If you have a large family or need to run multiple showers at once, consider a higher-capacity model. For most RV users, Apus delivers enough hot water for daily needs without waiting.
Apus Installation: What To Expect
Installing the Apus heater is a straightforward process. Most RV owners can do it themselves with basic tools. Here’s a step-by-step summary:
- Remove old heater: Disconnect water and gas lines, and take out the old tank.
- Install Apus unit: Fit the heater into the existing cutout, attach water and gas lines.
- Connect power: Attach the electrical wires for ignition and controls.
- Test for leaks: Run water and gas to check for leaks.
- Set temperature: Use the digital control panel to choose your preferred setting.
Note: If you’re not confident, hire a professional. Incorrect installation can cause leaks, fire hazards, or low performance.
Apus Digital Controls: Impact On Water Output
The Apus heater comes with a digital control panel. This lets you:
- Set water temperature
- Monitor flow rate
- See error codes
Digital controls help you adjust settings for maximum comfort and efficiency. If you notice the flow rate dropping, check for error codes or maintenance reminders.
Apus Vs Traditional Tank Water Heaters
Why switch to a tankless model like Apus? Here’s a quick comparison:
| Feature | Apus Tankless | Traditional Tank |
|---|---|---|
| Hot Water Output | 2.5–3.5 GPM, continuous | 6–10 gallons, then reheats |
| Heating Time | Instant | 15–30 minutes |
| Energy Use | Efficient, only heats when needed | Heats whole tank, even if not used |
| Space | Compact | Bulky |
| Maintenance | Easy, less frequent | More frequent, harder to clean |
Insight: Many RV owners don’t realize that tank heaters can run out of hot water, especially with back-to-back showers. With Apus, you get continuous hot water as long as propane and water supply last.
Troubleshooting Low Flow Rate
If your Apus heater isn’t producing enough hot water per minute, try these steps:
- Check water pressure: Make sure your RV pump is working and pressure is above 40 PSI.
- Inspect propane levels: Low propane means low heating power.
- Clean filter: Remove mineral buildup.
- Adjust temperature: Lower the set temperature to increase flow.
- Flush the heater: Remove scale and debris.
If problems continue, check the digital control panel for error codes. If you need help, contact Apus customer support or visit their official website.
Safety Tips For Apus Rv Tankless Water Heater
Safety is critical when using any gas appliance. Here are key tips:
- Install a carbon monoxide detector in your RV
- Keep the heater area well ventilated
- Check for gas leaks regularly
- Do not block the exhaust vent
- Turn off the heater before long storage
These steps protect you and help your heater last longer.
Maximizing Apus Performance: Pro Tips
To get the best performance from your Apus water heater:
- Use a showerhead with low GPM (1.5–2.0) to save water
- Schedule showers and washing at different times
- Clean the heater every season
- Monitor water pressure and adjust as needed
- Keep propane tanks full
Advanced tip: If you travel in cold climates, insulate your water lines to prevent freezing and improve heater efficiency.
Apus Water Heater: Environmental Impact
Apus is designed to be eco-friendly. It only heats water when you need it, reducing energy waste. Compared to tank heaters, it uses less propane and produces fewer emissions.
If you want to lower your environmental footprint:
- Install a water-saving faucet
- Set the heater to 120°F, not higher
- Limit shower time
Where To Learn More
For technical details and official specifications, visit the Apus manufacturer’s website or check out this helpful resource: Wikipedia: Tankless Water Heater.
Frequently Asked Questions
How Many Showers Can Apus Rv Tankless Water Heater Run At Once?
Usually, Apus can run one shower and one faucet at the same time. For two showers, the flow rate may drop and water may not be hot enough. It’s best to stagger showers.
What Is The Maximum Flow Rate Of Apus Rv Tankless Water Heater?
The max flow rate is 3.5 GPM in warm climates with high water pressure. In colder conditions, expect 2.0–2.5 GPM.
Can Apus Rv Tankless Water Heater Work With Low Water Pressure?
Yes, but the flow rate may drop to 2 GPM or less. For best results, keep your RV water pressure above 40 PSI.
How Does Apus Compare To Girard And Suburban Models?
Apus offers similar flow rates to Girard (2. 4–3. 0 GPM) and is slightly lower than Suburban (up to 3. 5 GPM). It’s a good balance of size, performance, and price.
Is Apus Rv Tankless Water Heater Safe For Winter Use?
Yes, but in very cold conditions the output drops. Insulate water lines and use the heater regularly to prevent freezing.
Final Thoughts
The Apus RV tankless water heater produces between 2.5 and 3.5 gallons of hot water per minute, depending on conditions like water temperature and pressure. This is enough for most RV needs, including showers and sinks, but heavy use may require scheduling or upgrading to a higher-capacity model. Apus is a reliable, efficient choice for small to medium RVs, and its digital controls make it easy to adjust settings. With proper installation and maintenance, you’ll enjoy continuous hot water wherever your travels take you. Always consider your climate, water pressure, and propane supply to maximize performance. For most RV owners, Apus offers a comfortable balance of convenience and efficiency, turning your RV into a true home on the road.
