How to Install Tankless Water Heater | Easy Guide
Replace an older tank-style water heater with an energy-efficient tankless model is an invaluable home upgrade, but requires special skills, tools, and permits before being attempted. So learn how to install tankless water heater here. This guide will provide all the knowledge and advice necessary for installing tankless hot water. Covering both gas and electric models, it outlines each step so you can decide if you want to undertake the installation yourself or hire an installer for tankless hot water installation. Installation: A Detailed Overview Installing a tankless water heater requires more preparation than replacing an old unit, since you are making significant upgrades to your home’s infrastructure. Therefore, conducting extensive research and preparation are crucial. When installing one you must deal with water, gas, and electricity -each subject to strict local building codes for safety considerations. An essential element of a successful tankless installation, in comparison to traditional tanks, is having larger capacity utility lines available. Since a tankless unit heats water only when needed, its energy demands increase quickly requiring larger gas lines or heavier electrical wiring than your old tank had required. Before beginning this project it is wise to check with your local jurisdiction as this project represents major home improvements that require permits before getting underway. Advantages of a Tankless Water Heater Choosing to install tankless water heaters offers several important benefits over traditional storage tank models. These advantages often make the initial higher cost worthwhile in the long run. Endless Hot Water: The biggest benefit. Since the unit heats water as it flows through, you will not run out of hot water. You can take long showers or run the dishwasher and laundry at the same time without worrying about a cold surprise. Greater Energy Efficiency: Tankless heaters only use energy when a hot water tap is on. A traditional tank constantly heats and reheats a stored supply of water, wasting energy. This efficiency can save you a good amount on your monthly utility bills. Space Savings: These units are small, usually about the size of a suitcase. They mount to a wall, freeing up significant floor space compared to a bulky storage tank. This is a huge plus for small utility rooms or closets. Longer Lifespan: With proper maintenance, a tankless water heater can last up to 20 years or more. This is double the average lifespan of a standard tank-style heater. Reduced Risk of Water Damage: Since the unit does not store large amounts of water, there is no risk of a tank failure leading to a basement-flooding catastrophe. Before You Begin: Important Things to Consider Proper planning is the most important step for a successful tankless water heater setup. Skipping this section can lead to major headaches and added costs later on. 1. Sizing: Get the Right Flow Rate Tankless heaters are measured by flow rate, in gallons per minute (GPM), not by tank size. You must choose a unit that can meet your home’s peak hot water needs. Peak Demand: Think about how many hot water appliances you run at the same time. This could be one shower (2.5 GPM), a sink (1 GPM), and the washing machine (3 GPM). Your total need is 6.5 GPM. Temperature Rise: The flow rate listed on the box drops as the incoming water temperature gets colder. If you live in a cold climate, the unit has to work harder to raise the water temperature, which lowers its GPM output. Expert Advice: If you are unsure, talk to a qualified plumber to help size the unit. A correctly sized unit is essential to avoid running out of hot water when you need it most. 2. Location and Clearance Choose a non-freezing location close to the main gas or electrical supply and the most-used hot water taps. Service Access: Manufacturers require a minimum of 12 inches of clear space around the unit for maintenance and service. Outdoor Units: Some models are designed for outdoor tankless installation, which can simplify venting but may require anti-freeze kits in colder areas. 3. Permits and Codes Never start a water heater installation without checking with your local building department. Required Permits: Most areas require permits for plumbing, gas, and electrical work. This ensures your tankless hot water install is safe and follows all local building and safety codes. Inspections: An approved permit means a local inspector will check the work. This protects your home and often keeps the product warranty valid. Uncertain About the Best Water Heater for You? The choice between a gas and an electric model is a big one. It mostly depends on what your home currently uses and the upgrades that would be needed. Gas Tankless Water Heaters Gas models use natural gas or propane. They are generally more powerful and can handle higher GPM demands than electric models, making them a good choice for larger families. Gas Line Upgrade: You will often need to increase the diameter of your gas line. Traditional tank water heaters use a smaller line than the high-demand gas tankless unit. Venting Requirements: Gas units create exhaust fumes, including carbon monoxide. They must be properly vented to the outside using specific, approved materials. Electric Tankless Water Heaters Electric models use powerful heating elements. They are a good option for homes without an existing gas line or for “point-of-use” applications like a sink far from the main heater. Electrical Service Upgrade: Electric units require a massive amount of power. Many homes need a major upgrade to the electrical service panel to handle the dedicated high-amperage circuits the unit requires. No Venting Needed: Since there is no combustion, electric models do not require a complex venting system. Step-by-Step: How to Install an Electric Tankless Water Heater This is a general guide. Always follow the specific directions in your unit’s owner’s manual. Safety First: Turn off the circuit breakers for the old water heater. Turn off the main water supply to your home. Remove Old Unit: Drain the old tank using a