Guide to Replacing Your Traditional Water Heater with a Demand Water Heater
Introduction to Tankless Water Heaters
Tankless or demand water heaters provide hot water on demand rather than heating a large amount of water and storing it. This type of water heater can be more energy-efficient and space-saving, but the replacement process requires careful planning and execution. This guide will walk you through each step of the process from choosing the right model to testing your installation.
Choosing the Right Tankless Water Heater
Capacity
When selecting a tankless water heater, the first step is to determine the flow rate needed. This is typically measured in gallons per minute (GPM). You should consider your household's demand for hot water, which can vary based on the number of occupants, family routines, and hot water appliances (such as showers, dishwashers, and washing machines).
Fuel Type
Tankless water heaters can be electric or fueled by natural gas or propane. Consider the availability and cost of each fuel type in your area. Electric models are typically simpler to install but can be more expensive in regions with high electricity rates. Gas models may require professional installation and additional equipment like venting, but they can be more cost-effective in the long run.
Energy Efficiency
Look for tankless water heaters with a high Energy Factor (EF) rating. This rating indicates how efficiently the water heater converts energy to heat. A higher EF rating means less energy wasted, leading to lower utility bills and reduced environmental impact.
Gathering Necessary Tools and Materials
Before beginning the installation, ensure you have all necessary tools, including a screwdriver, wrench, pipe cutter, drill, level, and multimeter. For materials, you'll need mounting hardware, water and gas lines (if applicable), and electrical wiring and venting materials for gas units. Having a complete list of these tools and materials can save you time and prevent complications during the installation process.
Turning Off Utilities
Before you begin any work, you must turn off all relevant utilities to ensure safety. For electric units, turn off the power at the circuit breaker. For gas units, shut off the gas supply. Lastly, turn off the main water supply to prevent water leaks during the removal of the old water heater.
Removing the Old Water Heater
Start by disconnecting the cold water inlet and hot water outlet pipes. Then, drain the tank by attaching a hose to the drain valve and allowing the water to exit. Disconnect the power supply for electric or gas line for gas units. Remove any venting if applicable. After completing these steps, safely dispose of the old water heater according to local regulations.
Installing the New Tankless Water Heater
Mounting
Use the provided mounting bracket to secure the tankless water heater to the wall, ensuring it is level and at the recommended height, usually 12 inches above the floor. This will help in achieving proper installation.
Water Connections
Connect the cold water inlet and hot water outlet to the appropriate pipes. Use Teflon tape on threaded connections to prevent leaks. This step ensures that water will flow seamlessly from the tankless water heater to your home's pipes.
Gas/Electric Connections
Gas
Connect the gas line and install the necessary venting according to the manufacturer’s instructions. Proper venting is crucial to ensure safe and efficient operation of the unit.
Electric
Connect the electrical wiring, ensuring that the circuit is properly rated for the unit. This step is essential to avoid electrical hazards and ensure that the unit operates correctly.
Testing the Installation
After completing the installation, turn on the water supply and check for leaks at all connections. Next, restore the gas or electric supply and set the desired temperature on the unit. Test the hot water supply at various faucets to ensure proper operation. This process ensures that your new tankless water heater is functioning correctly and efficiently.
Additional Upgrades
Pressure Relief Valve
Ensure that the tankless water heater has a pressure relief valve installed. This valve prevents dangerous increases in pressure that can damage the unit or cause injury.
Water Softener
Consider installing a water softener if you live in an area with hard water. Hard water can lead to mineral buildup in the tankless unit, which can decrease its efficiency and lifespan.
Following Local Codes and Regulations
Ensure that your installation complies with local building codes. It may be necessary to obtain a permit or have the work inspected. This step is crucial to ensure that your work meets all safety and regulatory standards.
Safety Tips
If you are not comfortable with any part of the installation, it is advisable to hire a licensed plumber or technician to ensure safety and compliance with local codes. Professional installation can save you both time and potential hazards.