Thinking about upgrading your home’s water heating system? This guide to tankless water heaters is what you need if you’re considering these efficient on-demand appliances. They’re changing how we get instant hot water. Before committing, understand their functionality and suitability for your household.
Tankless water heaters, also called on-demand water heaters, heat water directly as it flows through. Unlike traditional tank-style units, no large tank of water is kept hot constantly, thus, no 24/7 heating costs. This can lead to significant long-term savings. Wondering if they’re a good fit? Let’s explore the pros, cons, and types available to make the best decision.
How Tankless Water Heaters Work
Understanding how tankless water heaters operate is crucial to appreciating their efficiency and value. Cold water enters the unit through a pipe when you turn on a hot water tap. An electric element or a gas burner, depending on the heater work of your model, heats the water. This ensures you have a consistent supply whenever needed.
The Heating Process
The heating process of tankless heaters is simple yet effective. A flow sensor detects the incoming water when you open a hot water faucet. This sensor alerts the control panel to activate the heating element or the gas burner, if you have a gas tankless model. The incoming water temperature is rapidly raised to the desired temperature as it moves through the heat exchanger.
For gas-fired units, several key steps ensure this efficiency: First, the flow sensor detects incoming water flow. The control panel ignites the burner and the heat exchanger transfers heat from the flame. Finally, a mixing valve sets the output temperature with consistent monitoring and adjustment by sensors. This non-condensing tankless approach makes on-demand heating remarkably energy-efficient, so you’re only heating water as needed. Some homes even see as high as a 34% energy reduction.
Types of Tankless Water Heaters
Two primary types of tankless water heaters exist: gas and electric. Each type offers specific advantages and factors to weigh when making a choice. It is advisable to explore both types to make an informed decision.
Gas Tankless Water Heaters
Gas tankless water heaters boast high flow rates, meeting multiple, simultaneous demands. This makes them a good fit for homes with higher hot water needs. A new gas water heater will set you back between $1,000 and $3,000 before installation.
Gas water heaters come in non-condensing and condensing models. Non-condensing tankless water heaters are a cheaper initial purchase but use more energy in the long run. Condensing gas tankless water heaters reclaim heat from the exhaust, boosting efficiency, despite a larger upfront cost.
Electric Tankless Water Heaters
Electric tankless water heaters are more compact and easier to install. This makes them perfect for point-of-use applications or smaller homes where space is at a premium. Though electric tankless water heaters have lower flow rates, they can suffice for households with moderate water demand.
While the price of an electric tankless water heater is lower, between $500 to $1,000, they can become more costly where electricity prices are higher. Be sure to weigh these cost considerations before purchase.
Advantages of Tankless Water Heaters
Let’s look at what makes tankless water heaters an attractive option for homeowners. We’ll look at benefits ranging from lower monthly bills to instant and endless hot water.
Energy Efficiency
Tankless water heaters shine in their energy efficiency. They reduce the typical yearly $400 to $600 water heating costs, making up 18% of household energy consumption.
Tankless water heaters excel in energy efficiency due to their on-demand operation, especially for lower consumption households. Even heavy-use homes can be 8-14% more efficient. A tankless unit might reduce costs through lower energy demand from eliminating standby loss, a typical drawback of tank storage heaters. These units have a high-efficiency rating when compared to tank-style models, and could make your existing electrical service suitable.
Endless Hot Water Supply
Say goodbye to mid-shower cold shocks with the endless hot water a tankless heater provides. As long as your water usage is within the unit’s maximum flow rate, the hot water never stops.
Large families or homes with significant water usage can experience the endless hot water supply these systems are known for. They make peak demand easier and help meet the higher peak hot water demand.
Space-Saving Design
Roughly the size of a small suitcase, tankless heaters offer substantial space savings. Their compact designs can fit easily in closets, on walls, or outdoors. The flexibility you get with mounting frees up valuable floor space and optimizes available areas.
Longevity
Tankless units outlive traditional tanks with a lifespan of over 20 years (compared to 10-15 for tank heaters). The longevity of a tankless model combined with energy savings help offset the higher initial cost.
Considerations When Choosing a Tankless Water Heater
Balance your understanding by weighing factors before converting. You must evaluate your home’s water usage, budget and temperature rise from your tankless unit.
Initial Cost
Tankless units typically cost more than traditional tanks ($1,000 – $3,000, plus installation). But lower energy use, lifespan and added property value makes them an attractive purchase for most.
Installation Complexity
Tankless units demand more complex installations than tank water heaters. Installing gas models may necessitate upgrading your gas line, venting, or both, impacting overall installation cost.
Electric models might demand a high-efficiency washing machine for proper installation. Ensure you evaluate the cost implications of installing any tankless water heater model, so that you don’t overextend your budget. If installing in a bathroom, think of the desired water temperature of both the shower head and sink faucets before purchase. Sales reps are also available to answer questions you have on purchasing the correct model.
Sizing Your Tankless Water Heater
Correct sizing is essential. Consider both flow rate (GPM) and temperature rise.
Determine peak hot water usage by adding the total flow rate of appliances used simultaneously. Calculate temperature rise (the temperature desired less your groundwater temperature).
| Fixture | Average Flow Rate (GPM) |
|---|---|
| Shower | 1.5 – 2.0 |
| Kitchen Sink | 1.0 – 1.5 |
| Dishwasher | 1.0 – 2.5 |
| Clothes Washer | 1.5 – 3.0 |
Consider each fixture or appliance’s flow rate for optimal sizing. It is advisable to consult a sales rep about tankless water heaters in regards to their specific features. When purchasing, check flow rate information as the flow rate required for multiple fixtures and appliances determines the size and type of unit best for your needs.
Maintenance Requirements
Though lower maintenance than tanks, they’re not maintenance-free. Mineral buildup necessitates regular flushing, particularly in hard water areas. Some install softeners to reduce maintenance and extend unit lifespan.
Environmental Impact
Consider the ecological benefits of these high efficiency water heaters, especially as environmental awareness rises. Reduced energy translates to smaller greenhouse gas emissions, which can impact your total flow.
Electric models powered by renewables offer even greater environmental benefits, so are generally recommended for environmentally conscious people. While efficient, particularly condensing models, gas tankless units utilize fossil fuels.
Cost-Benefit Analysis
Compare costs with long-term benefits before choosing a model. Long-term advantages may outweigh upfront cost. Calculate your current water heater’s cost versus tankless to learn where savings could exist.
Water Pros Plumbing notes higher upfront costs can be outweighed by savings, lifespan, and home value increase. $500 yearly costs with a 30% saving is $150 saved annually, equating to $3,000 in 20 years. Your water flow, gas type (natural gas or liquid propane), water supply pipe type, along with how often water flows will contribute to which size unit you need.
Conclusion
This guide to tankless water heaters covered how these units operate, their varieties, and pros and cons. They offer efficiency, endless hot water, and compact design. Yet they are pricey upfront with installation requirements that may cost more.
Ultimately, your needs (household use, budget, and saving goals) determine the value of going tankless. Consider the provided info and a conversation with a professional. Together, they’ll empower you to decide about this upgrade for your home. Consider water demand, output temperature and peak hot water demand before committing to a tankless water heater. Consult a professional if necessary, who can suggest if non-condensing or condensing models would be a good fit for your needs.
Remember that a guide provides an overview and may not address your particular situation. Professional guidance remains vital in making your choice.
Contact us today for more information or to schedule a free consultation.