|
|
Tankless Water Heater - What size do you need?
This page will give you a quick look at all our gas and electric water heaters.
For more information, please review each heater's detailed information
and on-line manuals.
|
Natural Gas or Propane Tankless Water Heaters
Click here for Electric Tankless Water Heaters
|
One major use
A single standard use is considered to be 2.5 gallons per minute (GPM)
More info...
- AquaStar 1600P - Standing Pilot - Gravity Vent
- AquaStar 1600H - Battery Sparked Ignition - Gravity Vent
- AquaStar 1600PS - Standing Pilot - Solar Booster or as Stand-Alone heater - Gravity Vent
- AquaStar 125FX - Electronic Ignition - Power Vent Horizontal Only
- AquaStar 125BO - Standing Pilot - Outside Installation Only for Warmer Climates Only
AquaStar 125 & 1600 Models will give you a max output of 4 GPM.
A 50-degree water input and a 55-degree temperature rise will give you
3.3 gpm. This is enough for a standard shower (2.5 gpm) and
maybe a small sink at the same time.
More info...
Bosch AquaStar 125BO Outdoor Tankless Water Heater will give you a max output of 4 GPM.
A 50-degree water input and a 55-degree temperature rise will give you
3.3 gpm. This is enough for a standard shower (2.5 gpm) and
maybe a small sink at the same time. Is used for outdoor installation only in
warmer climates.
More info...
Takagi T-KJr Model will give you a max output of 6.9 GPM.
A 50-degree water input and a 55-degree temperature rise will give you about 4.1 GPM. This is enough for one
standard shower (2.5 gpm each) and a sink at the same time. We call the TKJr a 1 1/2 use machine.
The Takagi T-KJr can also be used for heating applications up to 180 degrees.
More info...
|
Two major uses
A single standard use is considered to be 2.5 gallons per minute (GPM)
click for more info
- AquaStar 2400ES - Electronic Ignition - Direct Vent - Horizontal or Vertical Power Vented
- AquaStar 2700ES - Electronic Ignition - Horizontal or Vertical Power Vented
- Takagi T-K3 - Electronic Ignition - Horizontal or Vertical Power Vented
- Takagi T-M1 - Electronic Ignition - Direct Vent
Bosch AquaStar 2400ES Model will give you a max output of 6.35 GPM.
A 50-degree water input and a 55-degree temperature rise will give you 5.3 gpm.
Sealed Combustion - pulls combustion air from outside or inside.
This is enough for two standard showers (2.5 gpm each).
More info...
Bosch AquaStar 2700ES Model will give you a max output of 7.15 GPM.
A 55-degree temperature rise will give you 5.9 gpm. This is the largest tankless water heater
that Bosch produces. Enough for two to three standard uses at one time (2.5 gpm each).
More info...
Takagi T-K3 Model will give you a max output of 6.9 GPM.
A 50-degree water input and a 55-degree temperature rise will give you about 5.9 GPM. This is enough for two
standard showers (2.5 gpm each) and a sink at the same time. The Takagi T-K3 can
also be used for heating applications up to 180 degrees.
More info...
Various Rinnai Tankless Heater Models will give you (with a 50-degree water input and a
55-degree temperature rise) up to about 6.0 GPM. This is enough for two
standard showers (2.5 gpm each) and a sink at the same time.
More info...
|
Three major uses or more
A single standard use is considered to be 2.5 gallons per minute (GPM)
click for more info
- Takagi T-M1 - Electronic Ignition - Horizontal or Vertical Power Vented
Takagi T-M1 Model will give you a max output of 9.6 GPM.
A 50-degree water input and a 55-degree temperature rise will give you about 7.6 GPM. This is enough for three
standard showers (2.5 gpm each) at the same time. The Takagi T-M1 can
also be used for heating applications up to 180 degrees.
More info...
|
Specialty Uses
- AquaStar 1000P - Standing Pilot
AquaStar 1000P Model will give you about 1 GPM with a 50-degree water input
and 55-degree rise. The 1000P should not be used for showers.
More info...
|
|
|
Electric Tankless Water Heaters
|
One major use
A single Standard use is considered to be 2.5 gallons per minute (GPM)
More info...
- PowerStar AE 115
- PowerStar AE 125
- Stiebel-Eltron Tempra 20
- Stiebel-Eltron Tempra 24
- Stiebel-Eltron Tempra 29
- Stiebel-Eltron Tempra 36
PowerStar AE115 with a 50-degree water input and a 55-degree temperature
rise will give you about 2.4 gpm (80 amps - requires min 150 amp service). This is enough for a standard
shower.
More info...
PowerStar AE125 will give you about 3.4 gpm. This is enough for a standard
shower (2.5 gpm) and maybe a small sink at the same time. (120 amps - requires min 200
amp service)
More info...
Stiebel-Eltron TEMPRA 20 with a 50-degree water input and a 55-degree temperature
rise will give you about 2.4 gpm (80 amps - requires min 150 amp service). This is enough for a standard
shower.
More info...
Stiebel-Eltron TEMPRA 24 with a 50-degree water input and a 55-degree temperature
rise will give you about 3.1 gpm (100 amps - requires min 180 amp service). This is enough for a standard
shower.
More info...
Stiebel-Eltron TEMPRA 29 will give you about 3.4 gpm. This is enough for a standard
shower (2.5 gpm) and maybe a small sink at the same time. (120 amps - requires min 200
amp service)
More info...
Stiebel-Eltron TEMPRA 36 will give you about 4.5 gpm. This is enough for a standard
shower (2.5 gpm) and a small sink at the same time. For locations with ground water over
60-degrees - the Tempra 36 should give you enough hot water for 2 showers with 240 volts.
(150 amps - requires min 300 amp service)
More info...
|
Specialty Uses
- PowerStream RP1, RP3, RP2, RP7, RP12T
(Now called PowerStar AE9.5, AE3.4, AE7.2, AE12)
- Ariston GL2.5, GL4 GL6+
PowerStream - check specifications for these heaters. None of these
units should be used for showers.
More info...
Ariston - check specifications for these heaters. These are mini-tanks for
1 - 2 or 3 sinks.
More info...
|
|
What is a typical use? **
|
|
Appliance
|
Flow Rate GPM
|
|
Bathroom Faucet
|
1.0
|
|
Bath Tub
|
4.0 to 5.0
|
|
Shower
|
2.5
|
|
Multi Shower Heads
|
2.5 to 12
|
|
Kitchen Sink
|
1.5
|
|
Dishwasher
|
1.5
|
|
Washing Machine
|
2.0
|
Please note: These numbers may not reflect your appliances or fixtures due to
differences in water pressure from location to location. Differences are also
due to efficiency of appliances and fixtures.
If you have a multi shower head system - you need to find out how much water all the
shower heads will consume per minute. Make sure the tankless heater you use will
provide the correct amount of hot water. If you don't see one - contact us and we will
advise you how to use a tankless water heater with a multi-shower head system.
One last thing: We are assuming that your input water (ground) is 50°F. Your
actual input water may be slightly colder (not likely) or very much warmer (likely in warm climates).
You should check your input water temperature before relying on any of the above numbers.
If your ground water is colder then you will get less output - if your ground water is
warmer then you will get more output.
Average ground water in the USA is between 50 and 55°F winter to summer.
|
|
