Delta Limited Hydronic Boilers, 399B-899B

Delta Limited® series is based on the same basic design as the Hi Delta® product line. A reduced set of features and options provides rock-solid heating at reduced cost. 

Delta Limited Hydronic Boilers, 399B-899B
Full Input in BTUH
Flue Dia.
H4-399B  399,000 6"
H3-499B  500,000 6"
H3-649B  650,000 8"
H3-749B  750,000 8"
H3-899B  900,000 8"

Available Firing Modes
H3 2-Stage
H4 On-off

  • 84% Thermal efficiency.
  • Third-party certified under ANSI Z21.13.
  • Glass-lined cast iron headers with copper finned tubes. 
  • Bronze headers and cupronickel optional.
  • All sizes offered for natural gas or propane.
  • Pump-off delay, fixed at 300 seconds.
  • T&P gauge.
  • Flow switch.
  • Manual-reset high limit, 240F max.
  • Hot surface ignition with 3-try lockout.
  • Outdoor trim.
  • 45# PRV on size 399. 60# PRV on all other sizes.
  • Auto-reset high limit standard on H4-399B only.

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