Tankless water heaters, also known as on-demand or instantaneous water heaters, have become an increasingly popular option for domestic hot water over traditional tank-style units. As the names suggest, tankless heaters do not rely on a storage tank, but rather employ heating coils to quickly warm water as it flows through the unit. This allows for a nearly endless supply of hot water on demand instead of running out when a tank’s capacity maxes out.
Tankless units were originally pioneered in Europe and Asia where higher energy costs and smaller spaces made their efficiency and compact size more appealing. While pricier upfront, electrical or gas-fueled tankless models available today typically last twice as long as tank heaters and save owners 20-50% on their utility bills in the long run. As demand for energy conservation and smart home accessories grow, tankless water heaters are now mainstream options for American homes.
Rather than constantly maintaining a full tank of water hot 24/7 as energy intensive storage tank models do, tankless systems utilize heat exchangers to rapidly increase cold water temperatures only on demand when a hot water tap is activated. This maximizes energy efficiency as no residual heat is lost to the air when the unit sits idle.
Cold incoming water passes through precision engineered copper or stainless steel tubes warmed externally by natural gas burners or internal electrical coils up to 199°F if desired. An electronic control module swiftly gauges flow volumes and temperature needs to modulate gas input or electric wattage to efficiently achieve the target temp. Tankless heat exchangers transfer heat so rapidly they can supply 2-5 gallons per minute endlessly, though flow depends on unit size and incoming cold water temps.
Homeowners choosing tankless water heater installation instead of a traditional model enjoy numerous advantages:
When selecting an installation site, key considerations include:
Popular Indoor Mounting:
Choosing the appropriate size tankless model to meet household demand comes down to determining peak simultaneous flow rate needs so the heater can fire up to full capacity at any given moment without shortages. As these heaters lack reservoirs, they cannot compensate for under capacity. Consider needs for:
Also factor in any future kitchen or bath remodels that may add high volume fixtures. When in doubt, size up for comfort and convenience. Insufficient flow capacity triggers the unit to self-limit the rise in temperature to prevent overheating damage, resulting in frustratingly tepid “hot” water.
Consult local jurisdictions regarding permits needed for gas line work, electrical upgrades or exhaust venting through walls and ceilings. Utilize professional tradesmen for specialized tasks. Shut off cold water valves and gas/electrical supply to the region and drain all pipes. Gather necessary gear:
Tools – pipe wrenches, tube cutter, propane torch, flux brushes, soldering iron, plumber’s putty, Teflon tape
Materials – category III stainless venting, insulation wraps, pipe sealants, pipe fasteners, wall brackets
Costs – factor $500-2000 for parts like circuit upgrades or gas line installation plus $2000+ for professional unit installation unless highly skilled.
Follow these key phases to install a new gas-fired tankless water heater:
Electric tankless water heater installation follows the same mounting, ventilation, and water line connection process but with key electrical variations:
While tankless heaters require less routine maintenance than traditional models, annual inspections help sustain efficiency and lifespan:
While complex repairs are best left to licensed professionals, properly maintained tankless units should outlast traditional models 2-to-1.
Tankless water heaters involve careful placement planning, electrical knowhow and plumbing finesse to install but yield endless on-demand hot water for improved convenience, lower utility bills, and space maximization for years to come. Consult licensed professionals when complexity exceeds DIY capabilities. Enjoy those long steamy showers guilt-free knowing your energy and cost savings earn back install expenses relatively swiftly. The comfort and reliability of instantaneous hot water makes tankless a top choice to consider when upgrading home water heating in the modern age.
Question: How do tankless water heaters work and why are they considered energy-efficient?
Answer: Tankless water heaters, also known as on-demand water heaters, heat water directly without the use of a storage tank. When a hot water tap is turned on, cold water travels through a pipe into the unit, where it’s heated by either a gas burner or an electric element. This process eliminates the need to keep a large volume of water hot in a tank, leading to energy savings. They’re energy-efficient because they only heat water when needed, reducing the standby energy losses associated with storage water heaters.
Question: What are the installation costs for a tankless water heater compared to traditional models?
Answer: The installation cost of a tankless water heater is generally higher than that of a traditional tank model. This is due to the need for potential upgrades like larger gas lines, stainless steel vent pipes, or enhanced electrical circuits. However, these initial costs are often offset by the long-term energy savings and the longer lifespan of tankless models.
Question: What should be considered when choosing the type of tankless water heater for a home?
Answer: When choosing a tankless water heater, consider factors like the size of your home, the number of fixtures needing hot water, and your peak water usage. Gas-powered models can handle higher flow rates and are ideal for larger households. Electric tankless water heater, while more compact and easier to install, is better for smaller homes and lower usage. For whole-house systems, consider a model that can handle the combined flow rate of showers, sinks, and appliances used simultaneously.
Question: How much can I expect to save on energy bills with a tankless water heater?
Answer: Tankless water heaters can be 20-50% more energy-efficient than traditional tank water heaters, potentially saving hundreds of dollars a year. The exact savings depend on factors like water usage, heater efficiency, and energy rates. Additionally, the more hot water you use, the greater the savings, as tankless heaters are more efficient under higher usage.
Question: What are some installation requirements and professional skills needed for tankless water heaters?
Answer: Installing a tankless water heater requires professional plumbing and, depending on the model, electrical skills. Gas model needs a gas connector kit, proper venting with stainless steel vent pipes, and a suitable black pipe for gas supply. Electric tankless water heater requires a dedicated electrical outlet and possibly an upgraded electrical panel. Always hire professional plumbers for safe and efficient gas or electric unit installation, and ensure they adhere to local building codes and safety standards.
I'm expert on plubing with 30 years experience.