No two tankless water heaters are alike—unless you buy the same model. All kidding aside, it's important to understand what to look for when shopping for an electric tankless water heater. With so many brands out there, you can get lost on promises that always seem to fall through.

Here are some things to look for as you shop to ensure that you're getting the best there is:

True on-demand heating
While some electric tankless water heaters may promise instant warm water, not all can deliver. Then you're left standing in a cold-water sandwich before work. Not having hot water when you need it can be annoying and completely goes against the reason you bought your water heater.

Eemax products have thermo optical sensors built in that deliver warm water when you need it, with no spikes in temperature at the faucet or nozzle. According to Energy Saver, water heating accounts for 18 to 20 percent of your utility bill. Don't get ripped off and go with a trusted brand with built-in technology specifically designed to deliver you hot water on the spot.

Ensure you get hot water on demand by taking time to pick your next electric tankless water heater.

Maximum energy efficiency
Energy efficiency is the buzzword of the decade as the U.S. government pushes to get more people connected to renewable energy and using efficient appliances. This makes it easy for companies to upsell tankless water heaters, even though they may not have the capabilities being pushed.

Eemax electric tankless water heaters are 99 percent energy efficient. This is because there is no storage tank where water sits and loses temperature. Electricity is only used when warm water is called upon at the sink, ensuring that homeowners aren't paying for more than they use.

Protects against disease
Storage water heaters have a tank that sits all day and night, stagnating full of water. Bacteria is susceptible to buildup both inside and out, leaving some homeowners at serious risk. Some of these risks include Legionella bacterial growth, which thrives in still, warm water.

Because there's no tank on electric tankless water heaters, water doesn't have a chance to sit still in your system and collect bacteria or calcify. Water goes directly from your pump, through the system, through the pipes and comes out at your faucet. Feel safe knowing your electric tankless water heater is protecting against Legionella bacteria while giving you the best energy efficiency in town.