If you live in the Okanagan, you know our hard water is tough on appliances. That mineral buildup is the number one reason traditional water heaters fail faster here. An electric tankless water heater is a fantastic upgrade, but its installation is more complex than a simple swap. This guide breaks down how to install an electric tankless water heater, covering everything from checking your electrical panel's capacity to making the right plumbing connections. We'll show you the steps involved so you understand the full scope of the project and why professional expertise from a team like TruFinity Plumbing Heating & Cooling is so critical for a safe, long-lasting system.

Key Takeaways

Professional Installation is a Must: Installing an electric tankless water heater involves complex, high-voltage wiring that requires a licensed professional. A DIY approach is not only a safety risk but will also likely void your manufacturer's warranty.
Confirm Your Electrical Capacity First: Before purchasing a unit, have a professional assess your home's electrical panel. These heaters have a significant power draw, and your system may need upgrades to handle the load safely without tripping breakers.
Annual Flushing is Essential in the Okanagan: Our region's hard water leads to mineral buildup that can damage your heater and reduce its efficiency. An annual descaling flush is the single best way to protect your investment and ensure it runs smoothly for years.

What is an electric tankless water heater?

If you're tired of racing against the clock for a hot shower or paying to heat a giant tank of water 24/7, an electric tankless water heater is a smart upgrade. Unlike traditional tank heaters that constantly store and reheat water, a tankless unit provides hot water on demand. This means you get an endless supply of hot water exactly when you need it, whether it's for a long shower, running the dishwasher, or doing laundry all in a row. It’s a modern solution that saves both energy and valuable space in your home.

For homeowners in Kelowna, Vernon, and across the Okanagan, making the switch is becoming more and more popular. At TruFinity Plumbing Heating & Cooling, we specialize in providing advanced tankless water heater installation that offers endless hot water and greater efficiency. These systems are a fantastic way to improve your home's energy use and ensure you never have to plan your day around your water heater's recovery time again. They are compact, efficient, and built for the long haul, making them a solid investment for any household looking for more comfort and convenience.

How it works

The magic of a tankless water heater is its simplicity. When you turn on a hot water tap, cold water flows into the unit. An electric element inside the heater activates instantly, warming the water to your set temperature as it passes through. Since there's no storage tank, the unit only uses energy when you're actively using hot water. This on-demand process is what makes them so energy-efficient. However, it's important to know that electric tankless heaters require a significant amount of electricity to heat water that quickly, often more than a standard home's electrical system is set up to handle without upgrades.

Why going tankless makes sense in the Okanagan

Tankless water heaters last much longer than traditional models, often over 20 years, and their energy efficiency can lead to noticeable savings on your utility bills. But for us here in the Okanagan, there’s an even bigger reason to consider one. Our region has notably hard water with high mineral content, which causes faster sediment buildup in traditional water heaters. This buildup reduces efficiency and shortens the appliance's lifespan. A tankless system minimizes this issue, and to make it even better, Trufinity includes a free inline sediment water filtration system with every tankless installation to protect your investment and keep it running smoothly for years.

Check your home's electrical and plumbing requirements

Before you even think about picking up a wrench, the most important step is to make sure your home is ready for an electric tankless water heater. These units are powerful and have specific needs that your current setup might not meet. Getting this part right prevents major headaches, from flickering lights to tripped breakers and even serious safety hazards. Think of this as the prep work that guarantees a smooth and successful installation. It’s all about understanding your home’s capacity before you commit.

Electrical panel and service capacity

An electric tankless water heater is a true workhorse, but it needs a lot of electrical power to heat water instantly. The first thing to check is your home's main electrical panel. You need to confirm if it has enough overall capacity, or amperage, to support the new unit without overloading your entire system. An undersized panel can lead to constant issues and isn't safe. This is where a professional assessment is invaluable.

Electrical hookup and permit requirements for electric tankless water heaters are site-specific and not detailed in our knowledge base. TruFinity recommends a professional on-site assessment to determine electrical service capacity and required permits before any installation.

Circuit breaker and wiring needs

This isn't a device you can just plug into any old outlet. An electric tankless unit requires one or more dedicated circuits connected directly to your breaker panel. This ensures it gets the consistent power it needs without competing with other appliances like your oven or air conditioner. The right wiring and breakers prevent overheating and are essential for safe operation. A licensed technician from TruFinity Plumbing Heating & Cooling can identify the exact requirements for your chosen model and ensure everything is installed to code.

Water line and pressure checks

Your plumbing is just as important as your electrical system. You’ll need to inspect your existing hot and cold water lines to ensure they are in good shape and can be easily connected to the new heater. In the Okanagan, we have another factor to consider: our notoriously hard water. The high mineral content can cause sediment buildup. That’s why we include a free inline sediment water filtration system with our tankless installations to protect your investment from day one and keep it running efficiently.

Local permits and code compliance

Any work involving your home’s core electrical and plumbing systems typically requires a permit. This ensures the installation is safe, compliant with local building codes, and won't cause issues down the road. Navigating the permit process in Kelowna, West Kelowna, Vernon, or Penticton can be tricky, as requirements can vary. Working with a certified professional takes this burden off your shoulders. The team at Trufinity handles all necessary permits, giving you peace of mind that your new tankless water heater is installed safely and correctly.

Gather your tools and materials

Getting organized before you start any project is the key to a smooth process. Installing a tankless water heater involves both plumbing and electrical work, so you’ll need a specific set of tools and materials. Having everything laid out and ready to go will save you from making extra trips to the hardware store and help you stay focused on the task at hand. This preparation step is just as important as the installation itself, ensuring you can work efficiently and, most importantly, safely from start to finish.

Your tool checklist

A proper installation requires the right tools for both plumbing and electrical connections. While every project is a little different, your basic toolkit should include a pipe cutter, pipe wrenches, a drill, a level, and a set of screwdrivers. For the electrical portion, you will need a reliable multimeter, wire strippers, and pliers. Because this job combines two different trades, it highlights the complexity involved. If you find your toolbox is missing a few key items, it might be a good moment to consider if a DIY approach is the best fit for this particular upgrade.

Your materials checklist

Beyond the tankless unit itself, you’ll need several items to complete the installation. This includes new water supply lines, appropriate pipe fittings, thread sealant, and mounting hardware. The most critical materials, however, are for the electrical system. Electric tankless heaters require a significant amount of power, which often means you'll need heavy-gauge wiring and new dedicated double-pole breakers for your panel. These components aren't one-size-fits-all; they must be correctly matched to your unit and home. To combat the Okanagan's hard water, we also recommend a filtration system. In fact, TruFinity Plumbing Heating & Cooling includes a free inline sediment filter with our tankless installations.

Essential safety gear

Safety should always be your top priority. Before you begin, make sure you have safety glasses and a sturdy pair of work gloves. The most important piece of safety equipment for this job is a non-contact voltage tester to ensure the power is completely off before you touch any wires. The electrical work is the most hazardous part of this installation. You must turn off the power at the main breaker and confirm it's off with your tester. Handling your home’s electrical panel can be dangerous, which is why we always recommend leaving the wiring to a licensed professional from a trusted company like Trufinity.

Prepare for a safe installation

Before you can enjoy that endless hot water, you need to handle the prep work. This stage is all about safety and setting yourself up for a smooth installation. Taking the time to do this right prevents major headaches, water damage, and dangerous electrical situations. Remember, working with your home’s plumbing and electrical systems requires care and attention to detail. If you ever feel unsure about a step, especially when dealing with your main electrical panel, it’s always best to pause and consult a professional.

The following steps will guide you through decommissioning your old water heater and preparing the space for your new tankless unit. Think of it as clearing the way for a major upgrade. A little patience here goes a long way in ensuring your new system works perfectly from day one. At TruFinity Plumbing Heating & Cooling, we know that a great installation starts with great preparation.

Choose the right location

Where you place your new tankless water heater matters more than you might think. The ideal spot is as close as possible to the fixtures you use most, like your shower or kitchen sink. Placing it nearby reduces the time you wait for hot water to arrive, which saves both water and energy. You’ll also want to choose an interior wall that can easily support the unit’s weight and is clear of any obstructions.

Make sure to leave enough clearance around the heater as recommended by the manufacturer. This isn't just for the initial installation; it ensures there’s enough room for a technician to perform future maintenance. A professional can help you find the perfect balance between efficiency and practicality in your home.

Shut off power and water

This is the most critical safety step, so please don’t rush it. Before you touch a single wire or pipe, you must completely cut off the power and water to your old unit. First, go to your electrical panel and switch off the circuit breaker dedicated to your current water heater. For an extra layer of safety, it’s a good practice to turn off the main power to your entire house before working in the breaker box.

Next, locate your home’s main water shut-off valve and turn it to the “off” position. This will stop any water from flowing into your pipes while you work. If you’re not 100% confident about identifying the right breakers or valves, this is the perfect time to call for professional plumbing repairs.

Remove your old water heater

With the power and water off, you can now safely remove your old tank heater. Start by draining the tank completely. To do this, connect a garden hose to the drain valve at the bottom of the unit and run the other end to a floor drain or outside. Open a hot water faucet somewhere in your house to release any pressure in the system. Then, open the drain valve on the tank. Letting air in helps the water flow out faster.

Be prepared: old tanks are heavy, and here in the Okanagan, they’re often loaded with mineral sediment from our hard water. Once it’s empty, disconnect the water lines and electrical connections, and carefully move the old tank out of the way. This is also a great time to think about adding one of our water filtration services to protect your new investment.

Install your electric tankless water heater

You've done the prep work, and now it's time for the main event. Installing your electric tankless water heater is a precise job that requires careful attention to both plumbing and electrical details. Following these steps in order is key to a successful and safe installation.

Before you begin, it's important to understand the risks, especially with the electrical work. Electrical hookup and permit requirements for electric tankless water heaters are site-specific and not detailed in our knowledge base. TruFinity Plumbing Heating & Cooling recommends a professional on-site assessment to determine your home's electrical service capacity and any required permits before installation. Our Red Seal Certified Plumbers and certified technicians are trained to handle these complex systems, ensuring your new heater works perfectly and safely from day one. This guide outlines the general process, but nothing beats having an expert eye on your specific setup.

Mount the new unit

Location is everything. Choose an indoor spot that’s protected from freezing temperatures, as this can damage the unit. It should also be close to your main electrical panel and water lines to keep the connections as short as possible. For a secure installation, mount the unit on a solid surface. We often use a 3/4-inch piece of plywood as a backing board, which provides a stable base to attach the heater. Make sure it’s level and can easily support the unit’s weight. This simple step prevents vibrations and ensures your heater stays put for years to come.

Connect the water lines

With the unit mounted, it's time to make the plumbing connections. You’ll be working with 3/4-inch cold water inlet and hot water outlet lines. Use Teflon tape on all threaded fittings to create a watertight seal and prevent leaks. We strongly recommend installing service valves on both the inlet and outlet lines. These valves make future maintenance, like descaling, much easier—a must-do task here in the Okanagan. It’s also the time to install essential safety components like a shutoff valve and a pressure relief valve. Proper plumbing connections are the foundation of a reliable system.

Connect the electrical wiring

This is the most critical and hazardous part of the installation, and it’s where we insist on professional expertise. An electric tankless unit has a high power draw and requires dedicated circuits. This usually means running heavy-duty 8 AWG or 6 AWG wiring directly from your electrical panel, connected to two or three new double-pole breakers. An incorrect electrical setup is a serious fire hazard. Your home’s electrical system must be able to handle the load safely. This is why a professional assessment by a certified technician from Trufinity is so important. We ensure everything is up to code and perfectly matched to your home’s capacity.

Test your new system

Before you flip the switch, you need to purge all the air from the system. Open the hot water taps in your home and let the cold water run through the new heater and the pipes for a few minutes until the flow is steady. This prevents the heating elements from burning out, a mistake known as "dry-firing." Once the air is gone, you can turn on the circuit breakers. Check all your plumbing connections for any signs of leaks. Then, test the hot water at a faucet. If everything is working, you’re all set! To keep it that way, remember to schedule professional maintenance, including an annual flush to combat our region's hard water.

Avoid these common installation mistakes

Installing a tankless water heater is a rewarding project that can improve your home’s energy efficiency and provide endless hot water. But it’s also a complex job where small mistakes can lead to big problems, from inefficient performance to serious safety hazards. Getting it right the first time is key to protecting your investment and your home.

To help you out, we’ve put together a list of the most common installation mistakes we see here in the Okanagan. Knowing what to watch for is the best way to ensure your new system runs safely and effectively for years to come. Let’s walk through what not to do.

Critical electrical safety mistakes

Working with your home’s electrical system is serious business. An electric tankless water heater requires a significant amount of power, and improper wiring is one of the most dangerous mistakes you can make. Always turn off the main power at the breaker box before you begin any work. If you have any hesitation or lack experience with electrical wiring, this is the part of the job to hand over to a licensed professional. Your safety, and the safety of your home, is the top priority.

Sizing and placement errors

Choosing the wrong size unit is a recipe for frustration. You need a heater with a flow rate that can handle your household’s demands. Think about the maximum number of hot water taps you might use at once, like running a shower while the dishwasher is on. It’s always better to choose a unit that’s slightly more powerful than you think you need. Equally important is checking your electrical panel. These units can draw 120 amps or more, and many older homes in Kelowna and Penticton may need a panel upgrade to handle the load. A professional can easily assess your home's capacity to prevent this costly mistake.

Don't skip these safety steps

In the rush to get a project done, it can be tempting to cut corners, but safety steps are there for a reason. Hiring a qualified and certified professional is the single best way to ensure your installation is safe, compliant with local codes, and protects your manufacturer’s warranty. The team at TruFinity Plumbing Heating & Cooling includes Red Seal Certified Plumbers who understand the specific requirements for homes in the Okanagan. We handle everything from pulling the right permits to ensuring the unit is installed perfectly, giving you total peace of mind. Plus, with our current offers and rebates, professional installation is more accessible than ever.

Maintain your new tankless water heater

Congratulations on your new tankless water heater! You’re all set to enjoy endless hot water and lower energy bills. To keep your system running efficiently for years to come, a little bit of regular maintenance goes a long way. While tankless heaters are known for being durable, they aren't completely hands-off, especially here in the Okanagan. The unique water conditions in our region mean that proactive care is the best way to protect your investment.

Think of it like regular check-ups for your car. A few simple steps can prevent bigger, more expensive problems down the road. The main tasks involve flushing the system to prevent mineral buildup, performing some quick visual checks, and scheduling a professional tune-up to keep everything in top shape. Taking care of these things ensures your heater operates safely and at peak performance, saving you money and giving you peace of mind. At TruFinity Plumbing Heating & Cooling, we've seen firsthand how proper maintenance can extend the life of these fantastic units.

Why annual flushing is key for Okanagan's hard water

If you live anywhere from Kelowna to Penticton, you know our water is different. As the local experts, we can tell you that "the region has notably hard water with high mineral content, which causes faster sediment buildup in water heaters." These minerals, mostly calcium and magnesium, create a crusty residue called scale inside your unit's delicate components. Over time, this scale forces your heater to work harder, reduces its efficiency, and can eventually lead to clogs or system failure. This is why "annual flushing is more critical here than in coastal BC." Flushing the system with a descaling solution removes this buildup, keeping the water flowing freely and protecting the internal parts.

Perform regular system checks

Beyond the annual flush, you can perform a few simple checks to keep your system healthy. Take a look at the air intake and exhaust vents to make sure they are clear of any debris, dust, or obstructions. This ensures proper airflow, which is critical for safe and efficient operation. It’s also a good idea to inspect the small screen filter on the water inlet. This filter catches sediment before it enters the unit, so cleaning it out every few months can prevent flow issues. These quick visual inspections only take a few minutes but can help you spot a potential problem before it gets worse.

When to schedule professional maintenance

While DIY checks are helpful, having a certified technician inspect your unit every year or two is the best way to ensure its long-term health. A professional from TruFinity Plumbing Heating & Cooling can check the sensors, heating elements, and electrical connections to make sure everything is working correctly and safely. We can also spot early signs of wear and tear that might not be obvious to the untrained eye. For total peace of mind, our TruLoyalty+ Membership includes an annual tankless water heater service, so you never have to worry about forgetting this important task.

Troubleshoot common installation problems

Even with careful planning, you might run into a few hiccups after installing your new tankless water heater. If things aren't working perfectly, don't worry. Many common issues, from flickering lights when you turn on a tap to lukewarm showers, have clear solutions. We’ll walk through a few troubleshooting steps to help you identify the problem. Just remember that safety is always the top priority, especially when dealing with high-powered electrical appliances. This guide will help you figure out what's going on and know when it’s time to call in a certified technician.

Solving electrical issues

Flickering lights or a breaker that keeps tripping are major red flags. These symptoms usually mean your home's electrical system can't handle the high power draw from the new unit. Electric tankless heaters require a lot of electricity, and your home will likely need bigger breakers and thicker wires to support it. The electrical part of the installation is the most critical and potentially dangerous step. It must be done by a licensed professional to keep your home safe and ensure everything works correctly.

Fixing water flow and temperature

Is your hot water not getting hot enough? This is often related to the flow rate. A tankless unit heats water as it passes through, so if the water is moving too fast, it doesn't have enough time to heat up. Try turning down the flow at your faucet or showerhead to see if the temperature improves. If the water is still just lukewarm, especially during our cold Okanagan winters, the unit might be undersized for your household's needs. Another local issue is sediment from our hard water, which can clog faucet aerators and reduce performance. Cleaning them is a simple first step to improving your water quality.

When to call a professional

While you can handle simple fixes like cleaning an aerator, most installation problems are best left to an expert. Professional installation is key to ensuring safety, complying with local codes, and keeping your warranty valid. If you're facing any electrical issues, persistent leaks, or confusing error codes on the unit's display, it's time to call for help. A DIY mistake can lead to expensive damage or create a serious safety hazard. The certified technicians at TruFinity Plumbing Heating & Cooling have the expertise to diagnose the problem and get your system running safely. You can see what your neighbors in Kelowna and Vernon think by checking out our customer reviews.

Should you hire a professional for installation?

While tackling a home improvement project yourself can be incredibly satisfying, installing an electric tankless water heater is one of those jobs best left to a certified expert. This isn't just a matter of connecting a few pipes; it's a complex task that involves significant electrical work and a deep understanding of local building codes. An improper installation can lead to serious safety hazards, costly damage, and a system that doesn't perform as it should. You need to be confident in your ability to handle high-voltage wiring, secure watertight plumbing connections, and ensure the unit is properly sized for your home's needs.

For a project this important, you want the assurance that it’s done correctly and safely from the start. In the Okanagan, where our hard water already puts extra stress on plumbing appliances, a flawless installation is key to ensuring your new water heater runs efficiently for years to come. A professional can assess your home's specific needs and recommend the right system, preventing issues like lukewarm showers or an overloaded electrical panel. The team at TruFinity Plumbing Heating & Cooling has the training and experience to handle the job, giving you total peace of mind. We combine expert craftsmanship with a commitment to "True Service, Infinite Care," making sure your home comfort is in the best hands.

Know the risks of DIY

Installing an electric tankless water heater involves high-voltage electrical connections that can be dangerous if handled incorrectly. A small mistake could lead to a risk of electrical shock or even a fire. Beyond the electrical dangers, improper plumbing connections can cause leaks, leading to significant water damage in your home. Many homeowners are also surprised to learn that a DIY installation will almost always void the manufacturer's warranty on the unit. This means if anything goes wrong with the water heater, you’re on your own for the full cost of repairs or replacement. The potential savings from a DIY job just don't outweigh these serious risks.

The benefits of professional installation

Hiring a professional installer from Trufinity ensures your new water heater is set up for safety, efficiency, and longevity. Our licensed and certified technicians understand the specific plumbing and electrical codes for homes throughout the Okanagan, from Kelowna to Penticton. We guarantee the installation is done right, protecting your home and keeping your manufacturer’s warranty intact. Plus, our customer reviews speak for themselves. We provide upfront pricing and ensure every job meets our high standards.

Frequently Asked Questions

Can my home's electrical system handle an electric tankless water heater? This is the most important question to ask before you buy a unit. Electric tankless heaters require a lot of power, often more than a standard home's electrical panel is designed to support. Many homes, particularly older ones, may need a panel upgrade and new, dedicated circuits to handle the load safely. The only way to know for sure is to have a certified technician from a company like TruFinity Plumbing Heating & Cooling perform a professional on-site assessment.

Why is annual flushing so important for tankless heaters in the Okanagan? Our water in the Okanagan is notoriously hard, meaning it's full of minerals that build up inside plumbing fixtures. In a tankless water heater, this mineral buildup, called scale, can clog the delicate internal components, reduce efficiency, and shorten the unit's lifespan. An annual flush with a descaling solution dissolves this scale, keeping your heater running like new and protecting your investment from our unique local water conditions.

What happens if I try to install a tankless water heater myself? While the DIY spirit is admirable, this is one project where the risks often outweigh the rewards. The biggest concerns are safety and your warranty. The high-voltage electrical work is dangerous if you're not a licensed professional, and a small mistake can create a serious hazard. Additionally, most manufacturers will void the warranty if the unit isn't installed by a certified technician, leaving you responsible for any future repair costs.

How do I know what size tankless water heater I need? Sizing a tankless unit correctly is key to being happy with its performance. It depends on two main factors: the flow rate you need (how many showers, faucets, or appliances you might run at once) and the temperature of the groundwater coming into your home, which is colder in the winter. A professional calculates your household's peak demand to ensure the heater you choose can keep up, so you never end up with a lukewarm shower.

Will a tankless water heater really provide instant hot water? A tankless heater provides hot water "on demand," which is a little different from "instant." The unit begins heating water the moment you turn on a tap, so you have an endless supply. However, that hot water still needs to travel through the pipes to reach your faucet. The time it takes depends on how far the heater is from the fixture you're using, but you'll no longer have to worry about the tank running out.

How to Install an Electric Tankless Water Heater Step-by-Step