• Get Your Parts Fast! Place your order before 4PM EST and it will ship on the same or next business day.

    Parts4Heating will be closed on Friday March 29, 2024

Navigate to the parts4heating.com homepage

CALL 800-536-1582

For a faster response Email Us

Get the Parts You Need Fast –
Over 15 Years of Quality & Trust

4.96/5
Shipping by Our USA Team
Direct to You

Keystone KS/KW

High Efficiency Condensing Boilers from 399 to 850 MBH

Keystone Condensing Boilers provide powerful solutions for large residential and light commercial applications with 5 models with inputs from 399 to 850 MBH. These products feature a stainless steel heat exchanger with a thermal efficiency between 95 and 97%. Their compact design minimizes floor space while the cabinet provides easy access to all components. The large user friendly control interface makes set-up easy. The advanced control modulates the boiler with a 5 to 1 turndown ratio. Up to 8 boilers can be joined in a cascade while the control features parallel modulation and boiler rotation to maximize efficiency and service life.

Keystone Condensing Boilers from 500 to 850 MBH are CSD-1 compliant as a standard feature. This saves both cost and installation time

OVERVIEW

  • Energy efficient with 95% to 97% Thermal Efficiency
  • Stainless Steel Heat Exchanger
  • CSD-1 Standard on 500 to 850 MBH Boilers
  • Integrated Cascade
  • Multiple pump control and thermostat inputs
  • 5 to 1 Turndown
  • 75 psi Pressure Relief Valve on Keystone Boilers

Filters

Filters

Sort By:
Products per page