HRDWXL Horizontal Double Wall Coil Indirect Water Heater

The HR is designed for horizontal applications and is perfect for installation under stairs, in crawlspaces and other height challenged areas. Double Wall Extra long single coil tanks with visible leak detection are engineered to minimize the chances of cross contamination of your potable water. These tanks are ideally suited for installations that are running glycol or similar products through the heat exchanger that may contaminate your drinking water. DWXL coil tanks should be run on higher boiler temperature to ensure your sufficient supply of hot water. For those requiring larger volumes or running lower temperatures then the double coil version would be recommended. The large 1 ¼” diameter coil enables your system to operate with a lower pressure drop. The tank is equipped with a ¾” fitting allowing for a re-circ line or alternately for a Corro-protec powered titanium anode (purchased separately) for those that have problems with (Smelly Water) or aggressive water and water quality concerns. AMI tanks are constructed from heavy gauge 316L Stainless Steel that is further pickled and passivated for superior longevity and corrosion resistance. Leading the way with the best in the industry 2.5″ thick “R”value -16.5 H/CFC-free polyurethane insulation exceeds all code requirements for standby losses.


  • Low profile for low headroom areas
  • Extra long coil for faster recovery rates
  • Double wall leak detection minimizes cross contamination
  • 2.5″ Polyurethane Foam Insulation  “R” Value 16.5

(Eliminates the need for after-market blankets)

  • 100% high quality 316L stainless steel construction
  • Pickled and Passivated for superior longevity and corrosion resistance.
  • High capacity storage for commercial and industrial applications
  • Designed for quick and simple installation
  • Powder coated steel jacket for high quality finish and durability
  • Customized tanks available upon request
  • Complete package with aquastat, s/steel aquastat well, temp-pressure relief valve and tee drain valve **drain not supplied with 120gallon tanks



Maximum Operating Pressure:

Shell: 150 PSI
Coil: 150 PSI

Limited Warranty:

15 years on residential tanks
5 years on commercial tanks


Capacity(US Gal) Heating Surface(Sq. ft) Coil Length(Ft)  Shipping Weight(Lbs)
J40 HRDWXL 40 14.4 40 170
J60 HRDWXL 60 14.4 40 200
J80 HRDWXL 80 14.4 40 292
J120 HRDWXL 119 14.4 40 350

80 HRDWXL shown