To find the correct capacity, add up all of the fixtures that you expect to use at the same time. For example, if you know that two people will be showering while another person runs a sink, you would need a 5.75 gpm unit, based on two 2.5 gallon-per-minute showers and one 0.75 gallon-per-minute faucet.
Yes. Two people can shower at the same time with a tankless water heater, but it depends on the unit's flow rate and the hot water demand of both showers. Tankless water heaters are rated by their maximum flow rate in gallons per minute (GPM) and their ability to heat incoming water to the desired temperature.
Proper sizing is important prior to select and installing a tankless, but in general the average rules for sizing the correct water heater for a household are roughly: 3.5 GPM for 1-2 fixtures simultaneously. 5 GPM for 2-3 fixtures simultaneously. 7 GPM for 3-4 fixtures simultaneously.
To calculate the size of the tankless water heater you need, start by multiplying the number of bathrooms in your home or business by 3. This will give you the gallons per minute (GPM) flow rate that you need. Next, multiply the GPM by 60 to get the maximum flow rate in an hour.
More expensive installation and maintenance.
Tankless systems require special venting, rerouted gas lines, possibly multiple units for a larger household, and sometimes maintenance like installing a softener.
Yes, running two showers at once with a combination Boiler is possible. The Boiler's flow rate and capacity must be sufficient to supply hot water to both showers without compromising pressure or temperature. High-capacity Combi Boilers, such as those with 38-42 kW outputs, are better suited to meet this demand.
Depending on the model, a tankless water heater can supply hot water for your entire home or just a single point, such as a shower, sink or appliance.
Absolutely! In fact, tankless water heaters are becoming the standard for new home construction because of the energy efficiency.
For instance, a typical shower uses about 10 gallons of hot water. So, if you have a 40-gallon hot water tank, you should be able to get four average-length showers out of your hot water tank. This also depends on how much hot water you use for other things.
Some people hesitate to decide on a tankless water heater because they can be a slightly higher cost; however, you get significantly more life out of one. A standard water heater tank lasts about 8-12 years. A tankless water heater can last as long as 25 years!
A 50-gallon water heater should be replaced with a tankless system with a 10 GPM flow rate just to be safe. Selecting the right flow rate ensures you won't experience cold showers or excessive energy costs. Proper sizing optimizes performance, providing hot water on demand without unnecessary waste.
For a family of four, you will likely need a tankless water heater capable of producing hot water for two to three bathrooms simultaneously. Factor in the temperature rise needed for your desired hot water temperature. Typically, a temperature rise of 70°F is required to achieve a 120°F hot water temperature.
Conclusion. While tankless water heaters are designed for efficiency and on-demand hot water, they can sometimes take a bit longer to deliver the hot water we desire. The reasons can range from the size and capacity of the heater, the distance between the heater and tap, to mineral buildup and low gas pressure.
Because tankless water heaters only consume energy when you need hot water, they're more energy efficient, saving you money on water and energy bills.
Before you commit to buying a tankless water heater, the primary drawbacks to know include: Higher upfront costs. Tankless water heaters are, on average, quite a bit more expensive to buy and install than tank water heaters. Access to fuel.
The federal tax credit for tankless water heaters in 2024 is an excellent opportunity for homeowners to save money while investing in energy-efficient water heating solutions. This tax credit is effective from January 1, 2023, to December 31, 2032.
It's true: tankless water heaters will cut up to 40% off your monthly energy bill. By heating water instantaneously and only when you need it, you and your family members can enjoy continuous, uninterrupted hot water at the same time, along with savings over a conventional tank.
The right tankless water heater can definitely take care of all your family's hot water needs, including taking multiple showers at once. If you're considering upgrading to a tankless water heater, it's essential to work with experienced professionals.
Low water pressure can affect the performance of a tankless water heater. A plumbing crossover can cause low water pressure by connecting the cold and hot water lines incorrectly. Installing a pressure regulator can help regulate water pressure and ensure a consistent flow of hot water to the tankless water heater.
Tankless Water Heaters: Tankless water heaters, also known as on-demand or instantaneous water heaters, heat water directly without the need for a storage tank. Plumbers recommend tankless water heaters for their energy efficiency, space-saving design, and endless hot water supply.
With a tankless water heater, you can take a shower, use the dishwasher, and do laundry all at the same time without losing hot water. On top of saving, you from the dreaded cold shower, it can also save you money and energy.
An ordinary tank type water heater could usually start supplying two showers at the same time, but the heated water in the tanks may run out before the showers are completed; that doesn't happen with the Tempra 24+...if you have enough hot water at the beginning with the Tempra 24+ for two (or three) simultaneously ...
As a general rule of thumb, “if you're showering more than one or two times a day most days, you're probably flirting with too much,” says Dr. Deanne Mraz, president and co-founder of Modern Dermatology in Westport, Conn., and an assistant clinical professor of dermatology at Yale New Haven Hospital.