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iHeat Magnum S16 Whole House Tankless Water Heater 16KW

$ 320.00

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Call us at 305-823-6991

Perfect for 2 baths in warm climates.

Just like the S-12, The S-16 whole house tankless water heater is part of the iHeat Magnum lineup. With 16 KW of heating power this tiny heater is more powerful than the S-12 and more than capable of supplying hot water to your entire house or condo and then some. Made for southern climates and warm to moderate incoming water temperatures, the Magnum S-16 tankless water heater will supply a water temperature rise of 95 degrees F at 1 GPM and 48 Degrees at 2 GPM. Couple that with energy and space savings and you can see how this heater will pay for itself in no time at all!

  • Indicator lights and power button for easy operation
  • Sleek design to maximize space saving benefits
  • Industry approved hexagonal thread backing
  • Very easy to install
  • Cover: Stainless Steel
  • Heat Exchanger: 100% Stainless Steel
  • Element: Brass Flange/Copper
  • 3 year warranty
Tech Specs
  • Pipe Fittings: 1/2"
  • 16 KW at 240V
  • Double Pole 70 Amp Breaker Required, 6/2 Wire
  • Dims: 11.5" x 9" x 4.5" inches
  • Weight: 7 lbs

Drakken iHeat tankless water heater installation diagram for S16


    Ask a Question
    • Does this unit come with a warranty?

      All iHeat brand water heaters feature a 1-year warranty.

    • What size fittings does this unit have?

      The iHeat S16 tankless water heater uses 1/2” fittings on both the inlet and outlet.

    • What electrical specifications are required for this unit?

      The iHeat S16 tankless water heater runs on 240 volts, and calls for a double pole 70amp breaker and 6/2 wire (6 gauge).

    • How many bathrooms can this water heater provide hot water for?

      The iHeat S16 tankless water heater has 16KW of heating power, which can provide hot water for up to 2 baths in warm climates, or up to 1-1.5 baths in cold/moderate climates.

    • I couldn’t find any info on maintenance of my M16 tankless water heater. Many suggest flushing the system with distilled white vinegar on an annual basis. No info on doing that for the M16.

      Flushing or close-loop flushing doesn't clean your heater. I know all the info available online regarding flushing. It simply doesn't work. What you need is a filter. Call us, we are trained professionals in tankless technology. 305-823-6991. Will be happy to point you in the right direction.

    • I don’t have any place to mount it indoors can it be hooked up outside

      This heater (S16) is for indoor use only but we have heaters certified for outdoor use. Currently not on our website but we have them in stock. Call us at 305-823-6991 for size and pricing.

    • What is the GPM ( galloons per minute)?

      6 GPM @ 60 PSI

    • how to set the temperature

      Use "up" arrow to increase temp. Bottom arrow to decrease. Center button turns unit on/off.

    • Can I use 36" stainless 1/2" flex connectors on inlet and outlet of S16?

      Yes, when installing your iHeat S16 tankless water heater, you may decide to use stainless flex connectors as opposed to copper piping stemming from the unit, which may be ideal in some instances where you are limited in your installation space.

    • i am in a commercial location where 208volts is coming in do you have a unit that will get the water up to 140 degrees


    • can this unit use for 3 stories house?

      No its too small. You'll need a 24 kw to 29kw heater.


      Please call our tech dept at 305 823 6991.

    • What size filter is used?

      Filter media is 10" X 2.5"