Tankless Water Heater Gpm Rating

Stiebel 230628 tankless electric water heater.

Tankless water heater gpm rating.

A low flow shower head may use 1 5 gallons of hot water per minute or gpm as it is called. The noritz nrc71dvng water tankless heater includes a high flow rate of 7 1 gpm. Tankless water heaters are rated by the maximum temperature rise possible at a given flow rate. This electric tankless water heater offers 4 gpm of hot water flow rate at 30 degrees fahrenheit and when the temperature increases the flow rate decreases.

Gallons per minute gpm is the key when it comes to sizing tankless water heaters. Rinnai s v75 in is our top lower price recommendation for a gas tankless water heater. While that comes at a higher upfront price it can also save you a ton in utility bills over the life of the heater. The smallest tankless heater on the list the sio green ir288 has a gpm of just 1 7.

It s rated at up to 7 5 gpm and we think it s a good choice for the average household. Tankless water heater efficiency is determined by the water flow rates inside your home. The lowest price you can get for the highest gpm is easily the takagi t h3 dv n that will give you a whopping 10 gpm. The resulting figure is called gpm gallons per minute or sometimes flow rate which helps determine your hot water heater size.

While traditional tank water heaters are calculated by your family size a tankless water heater is calculated by the quantity and types of fixtures or appliances it will serve. It needs 18kw of energy and the amperage capacity is 80 amps. Therefore to size a demand water heater you need to determine the flow rate and the temperature rise you ll need for its application whole house or a remote application such as just a bathroom in your home. Few other manufacturers of electric models can come close to stiebel eltron in terms of gpm and energy efficiency all its models boast an energy factor of 0 99 the highest rating among electric tankless water heaters.

It is also the lowest cost but it still has a high energy rating of 98 percent and a perfectly fine temperature rise of 40 degrees fahrenheit. You can easily run two or three things at once on this provided you re using low flow plumbing fixtures and efficient appliances depending on where you are. Thus you can get instant endless water from 2 minutes. Since tankless water heaters supply endless hot water you don t have to worry about capacity but instead think in terms of water flow rate.

Rinnai rur199in is the best ultra efficient tankless water heater with an astonishing flow rate of 11 gpm take a look at the table above for more info. We feel that it is quite higher when it comes to producing hot water instantly.