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Directory: Catalog > Boilers > Slant/Fin Boilers > Gas-Fired Residential

Slant Fin Sentry - S Series Gas-Fired Boiler

Slant/Fin Sentry Gas Boiler

Fuel: Natural Gas or LP (Shipped as NG unless LP is specified by customer at time of sale)
Type system:
Hot water
Capacity: 5 sizes, 34-150 MBH Input
Efficiency: up to AFUE 84.4%

Sentry is a hot water boiler heating system which is ideal for a wide variety of gas boiler requirements, as a replacement or for new installations. Its advanced design provides years of trouble-free, high efficiency operation while providing easy installation, even in sites with low chimney connections or low overhead clearance.

The flue passage design, thermal pin pattern and consistent wall thickness of Sentry's cast-iron heat exchanger sections ensure uniform heat transfer with less thermal strain and metal fatigue.

  • Intermittent ignition
  • Integral draft hood fit sites with clearance as low as 38-1/2"
  • Low profile makes problem installations easy
  • Advanced natural draft design promises efficiency & reliability
  • Includes a reliable, heavy-duty motorized vent damper to maximize efficiency
  • Metal push nipple to connect individual sections
  • 25 Year Limited Lifetime Warranty
  • List of standard equipment is below
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Place Order*
Intermittent Pilot Ignition, Natural Gas
Slant Fin S-34EDP Boiler
34,000 BTU Input
29,000 BTU DOE Capacity
84% AFUE Efficiency
Slant Fin S-60EDP Boiler
60,000 BTU Input
51,000 BTU DOE Capacity
84.4% AFUE Efficiency
Slant Fin S-90EDP Boiler
90,000 BTU Input
76,000 BTU DOE Capacity
84.2% AFUE Efficiency
Slant Fin S-120EDP Boiler
120,000 BTU Input
101,000 BTU DOE Capacity
84.1% AFUE Efficiency
Slant Fin S-150EDP Boiler
150,000 BTU Input
125,000 BTU DOE Capacity
83.4% AFUE Efficiency
Propane (LP) - Installed at factory at time of sale
Optional Propane Conversion
No Charge


Standard Equipment

  • Pre-assembed cast-iron heat exchanger with built-in air separator
  • Insulated base
  • Pre-assembled insulated flush jacket
  • Integral draft diverter
  • Stainless steel gas burners, gas orifices and manifold assembly
  • Combination gas valve, including manual shut-off, pressure regulator, pilot adjustment
  • Intermittent pilot ignition system
  • Pressure and temperature guage
  • Pressure relief valve (ASME) 30 psi
  • Two-way combination control (hi-limit and circulator relay)
  • Circulator, Taco 007, with 1-1/4 in. flange
  • Drain cock
  • Blocked vent safety switch -- mounted
  • Rollout Safety Switch

Control Features

  • Thermal targeting technology to conserve fuel
  • LWCO function -- Auto or manual reset
  • Thermal pre-purge option
  • LED display for operational info
  • Circulator relay -- three funtion option
  • Outdoor reset optional


*IMPORTANT:  By purchasing this boiler from JupiterHeating.com, the customer is agreeing that the unit will be installed by a licensed, professional heating contractor; that the customer and installer will follow all local zoning regulations, as well as all manufacturer's installation instructions, policies, and warranty requirements; and that the customer has read and understood JupiterHeating.com's Terms of Sale.

Shipping for unit is $300 to anywhere in the continental United States (multiple units are shipped at no additional charge).  The rate is based on residential delivery. Shipping savings may by possible for commercial delivery. Contact Us for a custom shipping quote if any of those situations apply, or if you are located outside the continental United States.



Information Source: Slant/Fin Boilers.