What is the Flow Rate of the Apus RV Tankless Water Heater? Explained

If you own an RV or are thinking about upgrading your water system, you might have heard about the Apus RV Tankless Water Heater. One of the most important factors when choosing a water heater for your mobile home is the flow rate. This number tells you how much hot water you can get at once—which directly affects your shower experience, dishwashing, and more. But what exactly is the flow rate of the Apus RV Tankless Water Heater, and how does it compare to other options? Let’s break down everything you need to know, whether you’re a seasoned RVer or just starting out.

Why Flow Rate Matters For Rv Tankless Water Heaters

When you turn on your tap, you expect hot water to come out quickly and steadily. The flow rate tells you how many gallons of hot water your system can deliver per minute (GPM). For RVers, this matters even more than at home because space, water, and energy are limited.

A low flow rate means you might not have enough hot water for a comfortable shower or to run two faucets at once. Too high, and you could waste energy or run into issues with your RV’s plumbing. Understanding the right flow rate for your needs is key to making a smart choice.

Understanding The Apus Rv Tankless Water Heater

The Apus RV Tankless Water Heater is designed specifically for recreational vehicles. It’s compact, efficient, and claims to provide endless hot water. But how does its flow rate stack up in real-world conditions?

Key Features

• On-demand heating: Heats water only when you need it, saving energy.
• Compact design: Fits in tight RV spaces.
• Digital controls: Lets you set the temperature easily.
• Propane-powered: Most models use LP gas, common for RVs.

These features sound great, but the core question remains: what is its actual flow rate?

The Flow Rate Of The Apus Rv Tankless Water Heater

The flow rate for the Apus RV Tankless Water Heater is typically 2.6 GPM (gallons per minute) at a standard temperature rise of 35°F. This means if incoming water is 55°F, the heater can deliver 2.6 gallons per minute at 90°F. This number is crucial for everyday tasks in your RV.

Here’s a quick summary of how flow rate changes based on temperature rise:

Why Does The Flow Rate Change?

The flow rate depends on how much the heater must warm the incoming water. In colder climates, where the water entering the heater is much cooler, the system can deliver less hot water per minute. If you travel with your RV, you may notice this change as you move between regions.

Insight: Many RVers forget that if they camp in colder areas, their “2.6 GPM” heater may only deliver 1.8 GPM or less. Always check the temperature of your incoming water to avoid surprises.

How 2.6 Gpm Looks In Real Life

Is 2.6 GPM enough? For most RV users, yes—but it depends on your habits. Here’s what you can typically do at this flow rate:

• Run one standard RV shower (1.5–2.0 GPM) comfortably
• Run a shower and a small sink at the same time (if both have low-flow fixtures)
• Fill a pot at the kitchen sink while someone is washing hands

But if you try to use two showers at once, or a shower and the kitchen sink at full blast, you’ll notice the hot water splits, and neither gets as hot.

Typical Rv Water Appliance Flow Rates

With 2. 6 GPM, you can run any one of these, or a mix, without running out of hot water. But using two high-flow appliances at once may reduce comfort.

Comparing Apus With Other Rv Tankless Water Heaters

You might wonder how the Apus model compares to other popular RV tankless heaters. Here’s a quick comparison:

The Apus holds its own against some of the best-known models, especially for flow rate. However, the real-world performance can differ depending on your RV’s setup, the incoming water temperature, and even your altitude.

How To Measure Your Actual Flow Rate

Many RVers rely only on the specs, but actual flow can be lower due to plumbing restrictions, low propane pressure, or even altitude. Here’s how you can check your real-world flow rate:

• Get a one-gallon container (like a milk jug).
• Turn your hot water tap to full.
• Time how long it takes to fill the container.
• Use this formula: 60 ÷ seconds to fill = GPM.

For example, if it takes 23 seconds, your flow rate is 2. 6 GPM (60 ÷ 23 = 2. 6).

Pro tip: Do this test with both the shower and a faucet running, and you’ll see the flow rate drop. This helps you set expectations for simultaneous hot water use.

Factors That Can Affect Flow Rate In Your Rv

The advertised flow rate is measured under ideal conditions. In an RV, many factors can reduce your real-world hot water flow:

• Water pressure: Low campground water pressure or a weak RV water pump will reduce output.
• Propane pressure: If your LP gas is low, the heater may not reach max performance.
• Pipe diameter: Narrow or old pipes can restrict flow.
• Altitude: At higher elevations, propane heaters can be less efficient.

A common mistake is blaming the water heater when the real cause is low water or gas pressure. Always check these before assuming your heater is the problem.

Is 2.6 Gpm Enough For Your Rv Life?

The answer depends on your needs. Here’s a quick guide:

• Solo travelers or couples: 2.6 GPM is usually perfect. You can shower, wash dishes, and even run a small washing machine—just not all at once.
• Families: If two people want to shower at once, or you have kids who love long showers, you may need to stagger hot water use.
• Luxury RVs: If your RV has a rain shower or large bathtub, you might want a higher-flow unit.

It’s important to remember that RVs are about compromise. Most campgrounds limit water use, so a moderate flow rate is both practical and eco-friendly.

Installation And Maintenance Considerations

Installing an Apus tankless water heater is not just about plugging it in. Proper installation ensures you get the full advertised flow rate.

Key Installation Tips

• Use the correct size propane line to avoid fuel starvation.
• Check your water pump can provide enough pressure (at least 40 PSI).
• Insulate pipes in cold weather to prevent heat loss.
• Follow all safety instructions provided by the manufacturer.

Maintenance

Regular maintenance also keeps your flow rate high:

• Descale the unit at least once a year if you travel in hard water areas.
• Check gas lines for leaks and blockages.
• Clean water filter screens regularly.

Neglecting maintenance is a common reason RVers notice their hot water gets weaker over time.

Real-world User Experiences

Many Apus owners report a noticeable improvement over their old tank-based heaters. Here are some real-life experiences:

• “With my old 6-gallon tank, showers were short and cold. The Apus gives me plenty of hot water as long as I’m not running everything at once.”
• “At higher altitudes in Colorado, I noticed the water wasn’t as hot, and the flow dropped. I learned to adjust the temp setting higher and run only one fixture at a time.”
• “Cleaning the filter every few months really helps. I didn’t realize how much sediment was building up and restricting the flow.”

One insight many new users miss: the maximum flow rate is only possible with ideal water and gas pressure. If you’re boondocking or using old campgrounds, performance will vary.

Energy Use And Efficiency

The Apus is designed to be efficient, only heating water when needed. However, your flow rate will impact energy use.

• Higher flow = more propane burned per minute.
• Lower flow = less energy, but you may wait longer for hot water.

If you want to save propane, use low-flow showerheads and turn off the tap when not needed (like while scrubbing dishes).

Common Mistakes When Choosing A Flow Rate

Here are some pitfalls to avoid:

• Ignoring climate: If you camp in cold places, your heater’s flow rate will always be lower.
• Overestimating needs: Most RVers do not need 4+ GPM. It’s better to choose a heater that matches your actual usage.
• Not checking plumbing: Old or narrow RV pipes can choke your flow, no matter what the heater promises.
• Running too many appliances: If you try to shower and wash dishes together, you’ll notice a drop in both temperature and flow.

Experienced RVers recommend testing your real needs before upgrading to a higher-flow model.

How To Maximize Your Apus Flow Rate

If you want to get the most out of your Apus water heater, try these tips:

• Install low-flow fixtures to stretch your hot water supply.
• Upgrade your water pump for better pressure.
• Maintain your heater regularly to avoid scale and sediment buildup.
• Use only one major appliance at a time for best results.

These simple steps can make your 2. 6 GPM heater feel much more powerful in everyday use.

Is A Higher Flow Rate Always Better?

Not always. A higher flow rate means more hot water, but also:

• More propane use
• Higher chance of running out of water if your RV tank is small
• Possible stress on your plumbing system

For most RVs, a flow rate between 1.5 and 3.0 GPM is ideal. The Apus sits right in this “sweet spot,” balancing comfort and efficiency.

When To Consider A Different Heater

If you need more than 2.6 GPM (for example, if you have a large family or luxury RV), you might consider:

• Installing two heaters in parallel
• Choosing a residential-style tankless unit (if your RV can handle it)
• Staggering hot water use (showers, dishes, etc.)

However, for most standard and mid-sized RVs, the Apus provides plenty of hot water for typical use.

Environmental Impact

Tankless water heaters are generally more eco-friendly than tank models. Because they heat water only when needed, there’s less wasted energy. At 2. 6 GPM, you’re also less likely to waste water compared to high-flow home units.

Pro tip: Use a low-flow showerhead (1.5 GPM or less) to save both water and propane, especially if you boondock or camp off-grid.

Comparing Flow Rate To Traditional Tank Rv Water Heaters

Traditional RV water heaters usually hold 6 to 10 gallons and heat water in advance. Here’s how they compare:

• Tankless (like Apus): Endless hot water, but only up to 2.6 GPM.
• Tank: Limited hot water (6-10 gallons), but you can run high-flow fixtures until the tank empties.

Many users prefer the “endless” aspect of tankless, but if you want to run a bathtub or two showers at once, a tank might suit you better.

Where To Find Official Specifications

Always check the manufacturer’s website for the most current data. The Apus RV Tankless Water Heater’s specs are often available on the official site or leading RV supply stores. For the most accurate, up-to-date information, refer to Wikipedia’s tankless water heating page or the manufacturer’s installation manual.

Frequently Asked Questions

What Is The Exact Flow Rate Of The Apus Rv Tankless Water Heater?

The Apus RV Tankless Water Heater delivers up to 2.6 gallons per minute (GPM) at a 35°F temperature rise. This means you get 2.6 GPM if your incoming water is around 55°F and you want it heated to 90°F. If the incoming water is colder, the flow rate will be lower.

Can The Apus Water Heater Run Two Showers At Once?

Usually, no. With a maximum of 2.6 GPM, you can run one standard RV shower and possibly a sink at the same time if both use low-flow fixtures. Running two showers at once will divide the flow and lower the temperature, making both less comfortable.

How Does Altitude Affect The Flow Rate?

At higher elevations, the air is thinner, which can make propane heaters like the Apus less efficient. This means the maximum flow rate may drop, and the water may not get as hot. If you RV in high-altitude areas, you may notice lower performance.

What Maintenance Keeps The Flow Rate High?

To maintain the best flow rate, descale the unit regularly, especially if you travel in areas with hard water. Check and clean the water filter and ensure your propane and water pressure are adequate. A little maintenance goes a long way to keeping your heater working well.

Is A Higher Flow Rate Better For Rv Tankless Water Heaters?

Not always. While a higher flow rate gives you more hot water at once, it uses more propane and can strain your RV’s plumbing. For most RVs, a flow rate of 2.6 GPM (like the Apus) offers a good balance between comfort and efficiency.

Choosing the right tankless water heater—and understanding its flow rate—can make your RV life more comfortable and stress-free. The Apus RV Tankless Water Heater is a strong choice for most travelers, offering a reliable 2. 6 GPM flow rate in a compact package.

With the right setup and smart water use, you can enjoy long, hot showers wherever the road takes you.