Can Electric Tankless Water Heater Be Used For Shower?

electric heater for shower

Imagine how devastating it would be to live in a house that has no shower. From being uncomfortable to enjoying no convenience, it is an aspect you will hardly want. Electric water heaters have proven to be a necessity among many households, and yours is no exception.

How about when you want to use the shower and need this electric water heater?

Will it work?

Let’s get a few insights into this.

Using electric water heaters for the shower is a possibility we can never deny. However, the difference lies in which device you choose. Unless you understand how to handle the procedure, a topnotch experience, in the long run, will scarcely come your way.

electric heater for shower

What Kind of Tankless Water Heater is Ideal for Indoor Use?

Tankless water heaters will always come in handy for your indoor use. However, you will often have to choose between gas and electric water heaters. The choice is dependent on the goals you want to achieve, your preferences, and the budget you have.

It will, however, be essential to understand which option gives you enhanced value for your money. Ideally, it would be best if you got something that will not expose you to too many costs in the long run. The truth is that you could rely on either gas or electric tankless water heaters indoors. That is because they all come with immense benefits that you will not want to miss.

It will also be worthwhile to note that the difference between gas and electric water heaters go beyond the initial expenses of rewiring the house. As such, we provide a breakdown of what to expect from each of these two.

Electric tankless water heaters

Electric tankless water heaters will assure you of up to 99% efficiency rates, which is more than reliable. Remember, the worst heater will give you a 93% efficiency rate. What could disappoint you is that these types of heaters do not attract any rebates from the government.

+Recommended Electric Tankless Water Heater for Indoor Shower

  • Endless on-Demand Hot Water; Consistent hot water when you need it that never runs out; Continuously monitored water temperature and controlled flow rates ensure efficiency and consistent performance within 1 degree of selected temperature
  • Save Space; EcoSmart tankless electric water heaters are 90% smaller than traditional tank heaters; may be installed on wall or at point of use; Dimensions 17 x 17 x 3.75 inches
  • Save Energy; EcoSmart tankless electric water heaters are 99% thermal energy efficient; Only heats water when called unlike a tank heater that maintains water temperature even when not being used. Save up to 50% in water heating costs according to the Department of Energy
  • EcoSmart ECO 27 Sizing; Refer to the sizing map. Requires 3x40 AMP Double Pole Breaker, 27-kilowatt tankless electric water heater ideal for providing hot water for whole home applications; provides between 2.7 and 6.5 gallons-per-minute depending on the inlet water temperature; refer to the sizing guide to select the proper solution
  • Warranty and Certifications; Limited Lifetime Warranty on electronics, exchanger and element; UL-499 certified; ETL Listed
  • Required Breaker Quantity: Three 40 Amp Double Pole
  • Recommended Electrical Panel: 200 Amps
  • NEVER run out of hot water with an ECOSMART tankless water heater.
  • Save up to 12 cubic feet of storage space.
  • Digital temperature control in 1-degree increments gives users complete control of hot water

Gas tankless water heaters

On the other hand, gas tankless water heaters come with an efficiency level of 60%, which is approximately 23% over the traditional ones. On top of that, you will be sure of government rebates of up to $300, which could end up cushioning you against financial constraints.

With this in mind, electric tankless water heaters will come in handy for those who aim at better efficiency levels. Conversely, if you are looking for lower maintenance costs, gas tankless water heaters will be the ultimate solution.

+Recommended Gas Tankless Water Heater For Indoor Shower

  • Endless hot water, On-demand usage, Compact, Space saving, Energy conservation
  • Computerized safety features, No pilot light to have to worry about
  • Safety features include freeze, overheat, surge protection, and troubleshooting diagnostic codes
  • Satisfies the 2012 SCAQMD Rule 1146.2 for Ultra-Low NOx Emissions
  • Primary heat exchanger utilizes commercial-grade copper alloy for 25 times better heat transfer than stainless steel, Integrated controls and power cord as standard features

Can You Use an Electric Tankless Water Heater for Outdoor Showers?

Sometimes, all you need is a hot shower, yet outdoors. The biggest concern, therefore, would be whether an electric tankless water heater will come in handy. The short answer to this is that you can install an electric tankless water heater outdoors.

Often, you will witness that there are specific tankless water heaters for outdoor use. Such water heaters pride themselves on the ability to withstand different elements, including weather and corrosion issues. As long as you get the right one, you will have no reason to worry.


Outdoor tankless water heaters will often vent from the free airflow, which implies you will need to install the right piping. It could be horizontal or vertical venting. Unlike indoor options, you will not necessarily need to attach the venting to the drain.


Ensure that you choose the right tankless water heater for your outdoor use. It should highlight longevity, ability to withstand different elements, and the readiness to offer value for money. Remember, its exposure to weather elements could compromise its durability. Unless the right materials are dominant, the unit will be vulnerable to extensive damage. Perhaps, you should consider enclosures made from aluminum or those that are rustproof.

-Why You Should Install Outdoor Tankless Water Heaters For Shower Use?

We have different reasons why you should install these outdoor tankless water heaters. They include the following:

• Simple setup

Installing these water heaters has proven to be not only straightforward but also less demanding. You will hardly need to worry about drainage when doing so.

• Fast installation

The installation takes up a relatively short time, which translates to affordability in labor costs. Lower installation costs imply that you will not end up constrained in the long run.

• Longevity

You can hardly overlook the essence of durability in pursuit of value for money. These outdoor tankless water heaters assure you of improved lifespans. As long as you consider weatherproofing them, you will be sure of enjoying their service for a relatively long time to come.

+Outdoor Tankless Water Heaters For Shower Recommend

  • Lightweight, easy to carry, and compact. This portable water heater provides instant and reliable hot water in a variety of outdoor scenarios with no electricity required: while you're camping, RVing, hunting, hanging poolside, washing your pets or horses, cleaning your vehicle, or even outside your tiny home, greenhouse, or food truck.
  • Runs on a standard 20 lb. Liquid Propane tank and is equipped with an electronic ignition. Powered by 2 “D” cell batteries, making it ideal for on-the-go
  • Features a safety shut-off that is activated when the unit runs longer than 20 minutes or is tilted more than 45 degrees in either direction
  • Low pressure activation of 20 PSI and is easy to connect to any standard garden hose
  • Rated at 3.0 Gallons per minute (GPM) of hot water output with an achievable temperature range of 50 – 120 degrees Fahrenheit
  • What's Included: Eccotemp L10 Portable Tankless Water Heater, shower head, 1/2' CSA certified gas regulator and hose, mounting hardware, and garden hose quick connect and adapter
  • Endless Hot Water: Our tankless hot water heaters let you enjoy unlimited hot water flow throughout the house with a compact and durable design that fits your home and lifestyle
  • Energy and Space Efficient Tankless Gas Water Heater: This small hot water heater conserves energy, only heating when necessary; Enhanced scale detection lessens possibility of serious, long-term damage to unit
  • Optimal Water Pressure: This tankless water heater offers a high-performance hot water flow rate up to 6.5 GPM for a powerful, constant stream that serves up to 5 appliances at once
  • Professional Installation Recommended: Visit the Find a Rinnai PRO page on our website to locate a qualified technician in your area to install your tankless water heater; We do not recommend installing a water heater without a technician
  • Guaranteed to Last: 10-, 5-, and 1-year residential factory warranty for heat exchanger, labor, and parts, respectively

Safety Guidelines on Using Tankless Water Heaters for Outdoor Showers

Like in any other setup, your safety will always need to be a priority. That will include the safety of the water heater too. Usually, you will need to pay attention to specific aspects while in this pursuit. They include the following.

• Mind how you install it

Ensure that you install it at a place that is not reached with ease. This way, you will keep it safer from vandalism in the long run.

• Monitor the AFR

The air-fuel ratio is one of the most crucial sensors you will need to observe. It will always be necessary for you to ensure that air and fuel mix accordingly, as this improves efficiency. It will also keep the emissions low.

• Consider freeze protection

Most tankless water heaters come with an internal freeze protection system. However, it will be upon you to make sure that it is working correctly. It is through this that you will be confident of the heat exchanger not falling below specific temperatures.

• Install the overheat cut off fuse

This safety feature comes in handy in disengaging the electric or gas valve upon any breach in the heat exchanger. With this, you will no longer need to worry about blowing up.

  • 𝟮.𝟲𝟰𝗚𝗣𝗠/𝟭𝟬𝗟 𝗣𝗿𝗼𝗽𝗮𝗻𝗲 𝗪𝗮𝘁𝗲𝗿 𝗛𝗲𝗮𝘁𝗲𝗿 - Maximum power output 68,000BTU/Hr.The temperature raise is 109.4℉ (43℃) at its highest point and 55.4℉ (13℃) is at its lowest point of 2.64 GPM. Also, 2.64 gallons of hot water can be produced per minute at the flow rate of 2.64 GPM. Low water pressure start up, just need 3.6 PSI of water pressure to start.
  • 𝗚𝗼𝗼𝗱 𝗳𝗼𝗿 𝗢𝗳𝗳-𝘁𝗵𝗲-𝗚𝗿𝗶𝗱 - Runs on a standard 20 lb. liquid propane tank and is equipped with an electronic ignition powered by two D-cell batteries. Can be used in a variety of scenarios: while you're camping, RVing, hunting, hanging poolside, washing your pets or horses, cleaning your vehicle, or even in your tiny home, greenhouse, or cabin house.
  • 𝗔𝗱𝘃𝗮𝗻𝗰𝗲𝗱 𝗦𝗮𝘁𝗲𝗳𝘆 𝗣𝗿𝗼𝘁𝗲𝗰𝘁𝗶𝗼𝗻 𝗦𝘆𝘀𝘁𝗲𝗺 - With CSA certification, safe as per Canadian and US Standard. Features over-heating protection, low water flow protection, dry combustion protection, anti-freezing protection, high water pressure protection and flame failure device.
  • 𝗪𝗵𝗮𝘁'𝘀 𝗜𝗻𝗰𝗹𝘂𝗱𝗲𝗱 - GASLAND BS264 Tankless Water Heater, CSA certified gas regulator and hose,5 feet On/Off Switch Shower Head, mounting hardware, garden hose adapter, Manual.
  • 𝗦𝗮𝗳𝗲𝘁𝘆 𝗜𝗻𝘀𝘁𝗮𝗹𝗹𝗮𝘁𝗶𝗼𝗻 𝗧𝗶𝗽𝘀 - To avoid gas leakage caused by improper sealing of the water heater, DO NOT TWINE TEFLON TAPE between gas regulator and gas inlet pipe. Always check gas leakage before operation.
  • 𝗠𝗮𝗶𝗻𝘁𝗲𝗻𝗮𝗻𝗰𝗲 𝗧𝗶𝗽𝘀 - Designed for portable outdoor use. It is splash-proof and can manage a little drizzle, however, prolonged exposure to rain/water will damage the internal components. We recommend using and storing your water heater in a dry place. For the winter, please drain out the wate by disconnecting the drain plug and store it in the warm and dry area.
  • Saving Energy & Money - Built-in insulation foam reduces heat loss. 2.5-gallon point-of-use mini-tank fits under your sink to provide hot water right where you need it
  • High Quality Built & Elegant Design - CAMPLUX electric water heater has glass-lined tank for long service life and easy to maintain. Elegant streamline design cover, made your kitchen more pretty
  • UL Approval Safety - Thermostat Control allows adjustment of water temperature. With 3 temperature level settings, range from 50°F to 149°F. High Limit devices provide protection while overheating
  • Friendly Use - With a mini tank compact design, can be wall or floor mounted under sink / counter, 120 volt outlet for independent installation or in-line with a large hot water source.(Max. water pressure is 150 PSI, CSA listed Temperature & Pressure relief valve included)
  • Easy Installations - Can be shelf, wall or floor mounted; Simply tap into the cold water line and install the water heater directly at the sink to provide hot water. Product dimension:11.8" W x 14.5" H x 10.4" D
  • Tech Support - CAMPLUX offers a 3-year support for the tank, a 2-year support for parts, and 24-hour customer service
  • Original Design: Tankless hot water heater's Circ-Logic technology offers recirculation patterns that match your habits; For the latest in non-condensing technology that speeds up service and installation, check out our new RE160eP model
  • Never Run Out of Hot Water with this Compact Propane Water Heater: Non-condensing tankless hot water heater from Rinnai is only the size of a small suitcase and fits in a wide variety of spaces, but provides up to 7.5 GPM (5 fixtures at once)
  • Smart, Durable Design: Includes 12-, 5-, and 1-year residential guarantee and 5-, 5-, and 1-year commercial factory warranty for heat exchanger, labor, and parts, respectively; See Controlr module for WiFi control (not included)
  • Professional Installation Recommended: Visit the Find a Rinnai PRO page on our website to locate a qualified technician in your area to install your tankless water heater; We do not recommend installing a water heater without a technician
  • Find Your Rinnai: See our product guides, manuals, energy guide, warranty information, videos, and tables to find the right tankless water heater for your home; Check our Ground Water Temperature Map to see if this heater is optimal for your region


As you look forward to getting the best experience in the shower, you will find it valuable to install these outdoors electric water heaters. Thanks to their durability and efficiency, you will be sure of the best returns in the long run.


David: Penn State-educated Mechanical Engineer and Business-savvy Fluid Dynamics Specialist. Balances family plumbing business support with a thriving engineering career at a top, undisclosed company. (they want it that way) I help Will with plumbing and HVAC needs on his Real Estate.

Check these out...