If you enjoy RV travel, you know that hot water is not a luxury—it’s a necessity. Whether you want a quick shower after a long hike or need to wash dishes, having reliable hot water makes life on the road easier. Traditional RV water heaters can be slow, bulky, and often run out of hot water just when you need it most. That’s where the Apus RV Tankless Water Heater steps in, offering endless hot water, energy efficiency, and a more compact design. But how does this modern system actually work? And is it right for your RV lifestyle? Let’s break down the technology, features, and real-world experience of using the Apus RV Tankless Water Heater.
The Basics: What Is A Tankless Water Heater?
A tankless water heater—sometimes called an “on-demand” water heater—heats water only when you need it. Unlike traditional heaters with a large storage tank, tankless systems do not keep a constant supply of hot water. Instead, cold water flows through the unit and is quickly heated by a gas burner or an electric element. This means you don’t have to wait for a tank to warm up, and you won’t run out of hot water unless you exceed the system’s flow rate.
How Tankless Differs From Traditional Water Heaters
Traditional water heaters store 6–10 gallons of pre-heated water in a tank. When you open a faucet, hot water is drawn from the top, and cold water enters at the bottom. If you use a lot of hot water quickly (for example, showering and washing dishes at the same time), the tank may run out.
Then you must wait for it to refill and reheat.
With a tankless model like the Apus, hot water is delivered instantly. There’s no waiting, and you never run out as long as the heater can keep up with your demand. This is especially useful in small RVs, where space and resources are limited.
How Does The Apus Rv Tankless Water Heater Work?
The Apus RV Tankless Water Heater uses smart technology to heat water on demand, ensuring energy is used efficiently and hot water is always available. Here’s a closer look at how the system operates, from the moment you turn on the tap to the hot water hitting your hands.
Step-by-step Operation
- Water flow begins: You open a hot water tap inside your RV (sink, shower, etc.). Cold water from your RV’s fresh water tank or city water supply enters the Apus heater.
- Flow sensor detects water: The heater has a flow sensor that notices when water is moving through the unit. This tells the system to start heating.
- Ignition and heating: Depending on the model, the Apus uses either a propane burner or an electric heating element. The burner or element instantly heats the water as it passes through the internal heat exchanger.
- Temperature control: The Apus includes a digital thermostat or control panel, letting you set your preferred water temperature. Smart sensors adjust the flame or heating power to keep water at a steady temperature, even if the incoming water is very cold.
- Hot water delivered: Within seconds, hot water flows to your faucet or shower. When you turn off the tap, the flow sensor tells the system to stop heating, so no energy is wasted.
Key Components Explained
To understand how the Apus system works, it helps to know the main parts:
- Heat exchanger: Transfers heat from the gas burner or electric element to the water.
- Flow sensor: Detects when water is moving through the heater.
- Control board: The brain of the unit, managing ignition, temperature, and safety functions.
- Burner/electric element: The source of heat.
- Exhaust vent: Safely removes gases from combustion (for gas models).
- Temperature sensors: Monitor and maintain safe, steady water temperatures.
Real-world Example
Imagine you’re camping in a cool mountain area. You turn on the shower, and icy water starts moving through the Apus heater. Within two or three seconds, the system senses the flow, lights the burner, and adjusts power to heat the water to your set temperature—say, 110°F.
The water stays hot for as long as you keep the tap open. When you finish, the system shuts down instantly, saving propane or electricity.
Main Features Of The Apus Rv Tankless Water Heater
The Apus isn’t just about endless hot water. It includes features designed for safety, efficiency, and convenience. Let’s look at what makes it stand out.
1. On-demand Heating
You don’t have to wait for a tank to refill. Water is heated as you use it, so showers can be longer and more comfortable.
2. Compact Design
Apus units are smaller and lighter than traditional tank heaters, saving valuable RV space.
3. Digital Temperature Control
Most models have a digital panel where you set the exact temperature you want, often from 95°F to 124°F. This prevents accidental scalding and ensures comfort.
4. Energy Efficiency
Tankless heaters only use energy when you need hot water. Traditional tanks keep water hot all day, using power even when you’re not around.
5. Safety Protections
- Flame failure device: Shuts off gas if the burner does not ignite.
- Anti-freeze protection: Prevents damage if temperatures drop below freezing.
- Overheat cut-off: Stops heating if water gets too hot.
6. Multiple Fuel Options
The Apus is available in propane and electric versions, letting you choose what works best for your RV setup.
7. Easy Maintenance
The design allows for simple cleaning and quick replacement of key parts, such as filters and burners.
Technical Specifications And Performance
To understand how the Apus compares to other water heaters, let’s look at typical specifications for their most popular model:
| Feature | Apus RV Tankless | Traditional RV Tank Heater |
|---|---|---|
| Heating Method | Propane or Electric | Propane/Electric (Storage Tank) |
| Hot Water Flow Rate | Up to 2.6 GPM (gallons per minute) | 6-10 gallons per tank (limited) |
| Recovery Time | Instant/Continuous | 15-30 minutes to reheat |
| Temperature Control | Digital Panel | Manual Dial |
| Size (inches) | Approx. 15 x 12 x 5 | 16 x 16 x 13 |
| Weight | ~20 lbs | ~35 lbs |
| Energy Use | On-demand only | Heats and re-heats all day |
These numbers show the Apus is designed for efficiency, speed, and convenience. With up to 2. 6 GPM, two people can use water at the same time (for example, one shower and one sink).
Installation: What To Expect
Installing an Apus RV Tankless Water Heater can be a DIY project if you have basic tools and plumbing knowledge. However, for safety, many RV owners prefer a professional installation. Here’s what’s involved.
Preparation
- Choose the right model for your RV’s size and hot water needs.
- Check available fuel: Propane or electric? The Apus offers both, but your RV must have the correct hookups.
- Find space: The unit is compact but needs proper ventilation (for gas) and access to water lines.
Installation Steps
- Remove the old heater: Disconnect plumbing, electrical wires, and fuel lines. Remove the old tank.
- Mount the Apus unit: Secure it in the chosen space, making sure vents are clear.
- Connect water lines: Attach hot and cold water pipes to the unit’s inlets and outlets.
- Connect power and fuel: Plug in the electric model or connect the propane line (check for leaks! ).
- Test the system: Turn on water and check for leaks. Test the heater, following the manual’s startup steps.
- Set the temperature: Use the digital panel to set your preferred temperature.
Most people can complete the swap in 2–4 hours. Always follow the manufacturer’s instructions and local safety codes.
Installation Cost
If you hire a professional, expect to pay $200–$400 for installation, depending on complexity and your RV’s layout.
Pros And Cons Of The Apus Rv Tankless Water Heater
No product is perfect for everyone. Here’s a quick look at the main advantages and downsides of the Apus system:
| Pros | Cons |
|---|---|
| – Endless hot water – Energy efficient – Compact, light design – Digital temperature control – Quick recovery (no waiting) – Lower risk of leaks (no tank to rust) |
– May require professional installation – Higher upfront cost – Sensitive to low water pressure – Some models need winterization – Maximum flow rate can limit use (not for large families) |
Non-obvious insight: Many new users don’t realize that tankless heaters need a minimum water flow (often about 0.5 GPM) to activate. If you use very low-flow faucets, the heater may not turn on. Also, tankless units are more sensitive to water pressure changes; if you have weak RV pumps, you might need an upgrade.
Energy Efficiency And Cost Savings
One of the main reasons RV owners choose the Apus is for energy savings. Traditional tank heaters keep water hot all day, using propane or electricity even when you’re away. The Apus only heats water when you need it.
Real-world Energy Use
If you camp off-grid or “boondock,” energy matters. Tests show that a tankless heater can cut propane use by 20–30% compared to a tank model, depending on your usage. For electric models, you only draw power while using hot water, which is perfect for solar-equipped RVs.
Cost Comparison Example
Imagine you use your RV 30 days per year:
- Traditional tank heater: $40–$60 per year in propane/electricity
- Apus tankless heater: $25–$40 per year
Over five years, you could save $75–$100 or more, plus avoid the hassle of running out of hot water.
Maintenance And Longevity
Tankless systems are often easier to maintain than tank heaters, but they do need some care to last.
Simple Maintenance Tasks
- Clean water inlet filter every 3–6 months (protects from dirt and debris)
- Flush heat exchanger with vinegar solution once a year (removes mineral buildup)
- Inspect propane connections for leaks (use soapy water)
- Check exhaust vent for blockages (for gas models)
A well-maintained Apus unit can last 10–15 years, compared to 6–8 years for most tank-style heaters.
Non-obvious insight: Hard water (high in minerals) can reduce performance in any water heater. Using a simple water softener or filter can extend the life of your Apus system and keep it working efficiently.
Common Problems And Troubleshooting
Even the best systems can have issues. Here are some common Apus tankless water heater problems and quick solutions:
- No hot water: Check that water flow is above the minimum (open tap fully). Make sure propane or electricity is on.
- Water too hot or cold: Adjust temperature on the digital panel. Check for blocked filters or low gas pressure.
- Unit shuts off during use: Inspect for error codes on the display. Low water flow or blocked vent may be the cause.
- Strange noises: Mineral buildup can cause rumbling. Flush the heat exchanger.
If you can’t fix the problem, consult the Apus manual or a qualified RV technician.
Is The Apus Rv Tankless Water Heater Right For You?
Choosing a water heater is about more than specs. Consider your RV lifestyle:
- For solo travelers or couples: The Apus delivers reliable hot water for showers and kitchen use.
- For families: Check your hot water needs. The maximum flow rate may not support multiple showers at once.
- For off-grid camping: The Apus is ideal for energy savings. Make sure your water pump provides enough pressure.
- For cold climates: Choose a model with anti-freeze protection and remember to winterize before freezing weather.
Comparison With Other Rv Tankless Water Heaters
The RV market offers a few tankless options. Here’s how the Apus compares to two popular competitors:
| Feature | Apus | Girard GSWH-2 | Suburban IW60 |
|---|---|---|---|
| Max Flow Rate | 2.6 GPM | 2.0 GPM | 2.5 GPM |
| Digital Temp Control | Yes | Yes | Yes |
| Energy Source | Propane/Electric | Propane | Propane/Electric |
| Anti-Freeze Protection | Yes | Yes | No |
| Size (inches) | 15 x 12 x 5 | 15.5 x 12.5 x 15.5 | 14 x 10 x 15 |
| Warranty | 2 years | 2 years | 2 years |
The Apus stands out for its combination of flow rate, energy options, and cold weather protection. But always check your specific needs before buying.
Environmental Impact
Using less propane or electricity is good for your wallet and the planet. The Apus RV Tankless Water Heater reduces energy waste by heating water only when needed. Over time, this cuts your carbon footprint—a small change, but important for eco-conscious travelers.
User Experience And Reviews
Online reviews and RV forums often mention:
- Quick, reliable hot water: Most users are impressed by how fast and steady the hot water is.
- Easy controls: The digital temperature panel is simple, even for beginners.
- Saves propane: Especially noticeable on long trips or when camping off-grid.
- Requires good water pressure: Some users had to upgrade their RV water pump for best results.
A few mention installation challenges or the need for periodic maintenance, but overall satisfaction is high.
For more technical details or the latest product updates, check the Apus official site.
Frequently Asked Questions
How Long Does It Take For Hot Water To Reach The Faucet?
With the Apus RV Tankless Water Heater, hot water is delivered in 2–5 seconds after you open the tap. This is much faster than waiting for a tank to reheat.
Can The Apus Rv Tankless Water Heater Be Used In Winter?
Yes, as long as you choose a model with anti-freeze protection and properly winterize your RV’s water system. Never leave water in the heater if temperatures will drop below freezing and the unit is not protected.
Does The Apus Work With Low Water Pressure?
The Apus needs a minimum water flow (usually 0.5 GPM) to activate. If your RV pump is weak, you may need to upgrade it for best results.
Is The Apus Difficult To Install?
Most RV owners with basic DIY skills can install it in a few hours. However, for safety—especially with propane connections—a professional installation is recommended.
How Often Does The Apus Need Maintenance?
Clean the water filter every 3–6 months and flush the heat exchanger once a year. This keeps the heater running efficiently and extends its life.
—
The Apus RV Tankless Water Heater brings modern, energy-efficient comfort to your RV adventures. With endless hot water, digital controls, and a compact design, it solves many problems of old-style tank heaters. Understanding how it works helps you choose the right model, install it safely, and enjoy reliable hot water wherever the road takes you.
If comfort and efficiency matter for your next trip, the Apus is a smart investment.
