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Large Electric Tankless Water Heaters
by Stiebel Eltron

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Tempra Whole House Electric Tankless Water Heater
Tempra whole house electric tankless water heater
Models Shown: Tempra 29 & 36
These whole house electric tankless water heaters feature:
  • Unlimited Supply of Hot Water - Keeps heating water instantly as you require. The Tempra system completely replaces a conventional tank heater with no disruption to your comfort and hot water needs.
  • Saves Energy and Reduces Your Electric Bill - Electric tank type water heaters are subject to stand-by losses which amount to 15 - 20% of the kWH used. Changing to a tankless system results in savings of 15 - 20%.
  • Sleek Design Saves Space - The Tempra takes up considerably less space than conventional tank type water tanks and saves valuable living space.
  • Control Temperature Simply by Setting a Dial - Set the knob on the front cover and enjoy water temperatures between 86°F (30°C) and 125°F (52°C). Change the desired temperature at anytime. Advanced microprocessor technology ensures that the water temperature never deviates from the set point.
  • Proven Reliability - Three years manufacturer's parts warranty
  • Seismic Proof Construction - The Tempra is a tankless water heater system, and is thereby not subject to seismic code. There is no need for preventative construction, as required when using a tank type water heater.
  • Superior, Reliable Performance - The Tempra has several temperature and flow sensors which feed their readings into the unit's proprietary microprocessor control. Heating elements are engaged in stages, achieving the temperature you desire. The Tempra continually monitors the water temperature it produces.
  • Ideal for homes, condos, apartments, and various commercial uses.
  • Specifications - See below.

208/240V -- Large Capacity Tankless Electric Water Heaters
w/ Digital Temperature Control

Model # Description Price & Quantity
Tempra 12 9.0 kW, 208V or 12kW, 240V large capacity unit $399.98

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208/240V -- Whole House Tankless Electric Water Heaters
w/ Digital Temperature Control

Model # Description Price & Quantity
Tempra 20 14.4 kW, 208V or 19.2kW, 240V whole house unit $559.95
Tempra 24 18.0 kW, 208V or 24kW, 240V whole house unit $599.95
Tempra 29 21.6 kW, 208V or 28.8kW, 240V whole house unit $699.95
Tempra 36 27.0 kW, 208V or 36kW, 240V whole house unit $729.95

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Hot Water Heater Scale Inhibitor System
hot water heater scale inhibitor system
This water heater scale inhibitor system features:
  • 3/4" NPT
  • 6 GPM
  • Cold water feed line
  • Inhibits scale build-up caused by hard water
  • Helps protect piping from corrosion
  • Maintains efficiency and extends life of system
  • Translucent dispenser cartridge allows for convenient detection of remaining scale stopper level
  • Slow dissolve rate for long life and consistent dosing
  • Multi-application design effective on all types of hot water systems-boilers, tankless, and tank-type (gas or electric)
  • Made from FDA CFR-21 compliant materials, suitable for drinking and cooking water and all food applications
  • Replacement cartridges (AP431) are available for these in-line scale inhibitor systems
Description Price & Quantity
Hot Water Heater Scale Inhibitor System $66.10
Replacement filter for hot water heater scale inhibitor system $27.31
Note: Recommended time to change/replace filter cartridge is 6 months.
Purchase a replacement cartridge to have on hand when needed.

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Technical Data

Tempra tankless water heater inside

Tempra Model 12 20 24 29 36
Phase 1 1 1 1 1
Voltage (V) 208 240 208 240 208 240 208 240 208 240
Wattage (kW) 9 12 14.4 19.2 18 24 21.6 28.8 27 36
Amperage (A) 44 50 70 80 88 100 105 120 132 150
Min. required circuit breaker size (A) 50 60 2 x 40 2 x 50 2 x 50 2 x 60 3 x 40 3 x 50 3 x 50 3 x 60
Recommended wire size (AWG COPPER) 8 8 2 x 8 2 x 8 2 x 8 2 x 8 3 x 8 3 x 8 3 x 8 3 x 8
Max. temp. increase above ambient water temp. @ 1.50 gpm 41 54 66 88 82 92 92 92 92 92
@ 2.25 gpm 27 36 44 58 54 73 66 87 82 92
@ 3.00 gpm 20 27 33 44 41 54 49 66 61 82
@ 4.50 gpm - - 22 29 27 37 33 44 41 55
Min. water flow to activate unit (gpm/Lpm) 0.29/1.1 0.58/2.2 0.58/2.2 0.87/3.3 0.87/3.3
Weight (lbs/kg) 15/6.8 18/8.1 18/8.1 24.25/11 24.25/11
Nominal water volume (gal/L) 0.13/0.5 0.26/1.0 0.26/1.0 0.39/1.5 0.39/1.5
Height x Width x Depth (inch) 14-1/2" x 14-9/16" x 4-5/8" 14-1/2" x 21-3/4" x 4-5/8"
Working pressure (PSI/bar) 150/10
Tested to pressure (PSI/bar) 300/20
Water connections 3/4" NPT

Tempra temperature rise chart

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frequently asked questions about water heaters

tankless water heaters "Will the Hot Water Heater Scale Inhibitor System change the taste or odor of water?"
hot water heater scale inhibitor system No. The active ingredient is colorless, tasteless, and odorless when used as recommended.

scale inhibitor system "What happens if you don't change cartridges often enough on the Scale Inhibitor System?"
corrosion prevention The original water condition and problem will reappear. Hardness will begin to build up again, which you want to avoid.

tankless water heaters "Is the Hot Water Heater Scale Inhibitor System's active ingredient safe?"
hot water heater scale inhibitor system Yes! All ingredients used are 100% pure food grade materials. They are approved by the USDA and meet purity requirements as a food additive by the World Health Organization.

tankless water heaters corrosion prevention "What are the best reasons to install a Scale Inhibitor System?"
preventing corrosion The system inhibits scale build-up and protects the piping from corrosion, which helps maintain efficiency and extends the life of the system.

tankless water heaters "How does the Hot Water Heater Scale Inhibitor System prevent corrosion?"
hot water heater scale inhibitor system It forms a thin protective layer on the inside of pipes and metal parts. This film or layer is microscopic in thickness and will not build up over time.

questions about tankless water heaters"Will an instantaneous water heater save me money on my utility bills?"
answers about flash water heatersYes, in most applications you will see a savings. There are some variables that could reduce the amount you save. One example is you will not run out of hot water, so longer showers could cut into your savings. Also, the cost of electricity, propane and natural gas in your area will affect the amount of money saved. The higher the cost for the energy type used to heat your water, the quicker you will recover the higher initial cost of installing a tankless versus tank style water heater.

Positives:

    You will never run out of hot water. "You want an hour long shower? No problem!"
    Electric units can be installed at the point of use.
    You're not paying energy costs to heat water 24 hours a day.
    They're easy to install.
    Our electric units don't require a T&P valve. (No tank!)
    Installing a tankless water heater will indeed be a bonus to the environment (why should we choose wastefulness when we're talking about finite natural resources)?

Negatives:

    They all need a minimum flow rate & pressure to turn on.
    The faster water flows through them, the lower the temperature rise. So,if you expect to take a shower while the clothes washer is running, you will need to select a unit sized to your hot water flow requirements. (Gas units handle this a little better than electric models)
    Electric units need heavy gauge wire. Example: the 9.5kw must have 8ga wire and a 50amp breaker.
    Gas units need a much larger, special flue pipe and larger gas supply than a conventional water heater.
    At times they can produce very hot water. It's easier to get scalded.
    Gas units are more complicated than a conventional water heater.
    With some brands, parts are hard to find (not a negative if you originally purchase from us, as we like to carry parts for the units that we sell).

Summary:
Tankless water heaters have their place. They're not "the answer" to every hot water need, but if they're used correctly they can be the solution to many of them.

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