Series 1321 ASME

1321 Series ASME Tankless Water Heater

If you are looking for a tankless unit that can handle large heavy duty applications, look no further.  The 1321 series can provide hot water to meet the demands of hotels, resorts and housing complexes.  A single unit can produce over 13 gallons per minute.  With a single system controller, you can connect up to 24 units, which is equivalent to 316 gallons per minute at 9.1 million Btuhs!  With its stainless steel casing and ASME accreditation, no other tankless water heater on the market can match its durability and performance. 


Click for installation photos.

Installation #1 restaurant               Installation #2 winery


>> HRS35 copper heat exchanger casing with special protective coating.

>> Available in Natural Gas (NG) and Propane (LP) models only.

>> Thermal Efficiency: 80% (NG), 84% (LP)

>> MSRP: $4,599.00 (unit only)

>> WARNING!!!  PVC cannot be used for venting.  Use only Category III (stainless steel venting).



>> Accessories:

  • Isolation valves (#IK-WV-6)
  • Outdoor vent cap (#VC-132)
  • Pipe cover (#PC-4S-SUS)
  • Remote controller outdoor junction box (#RC-OJB)
  • ScaleShield (#SS-HB-2; 2 required for N-1321M-ASME)
  • Quick-connect cable (#QC-1)
  • Multi-system controller (#SC-201-6M, -12M, -24M)