Indirect Water
Heaters
Leverage your existing boiler plant for high-efficiency domestic hot water production. ICA Heating carries the full Patterson-Kelley indirect water heater line — COMPACT, DURATION III & MACH 'n' ROLL — with factory-authorized sales, engineering, installation, and 24/7 service across New Jersey and New York.
Leverage Your Boiler Plant
for DHW Production
Indirect water heaters use hot water from your boiler to heat domestic water through a heat exchanger — no additional combustion equipment needed. This maximizes your existing boiler investment and simplifies equipment redundancy.
Patterson-Kelley offers three distinct indirect water heater platforms — from the heritage COMPACT semi-instantaneous unit to the fully packaged MACH 'n' ROLL condensing boiler-tank system. Each is engineered for decades of reliable, low-maintenance service in potable water applications.
As a factory-authorized dealer, ICA provides complete system engineering — from boiler pairing analysis and heat exchanger sizing through installation, startup, and decades of preventive maintenance.
Three Platforms. Every
Indirect DHW Application.
From heritage semi-instantaneous to fully packaged condensing — Patterson-Kelley offers an indirect water heater for every boiler plant and DHW demand profile.
Patterson-Kelley's longest-running product line — the COMPACT indirect water heater has been delivering reliable DHW across thousands of installations for decades. Constructed with a solid 90-10 copper-nickel shell and naval brass tubesheet, it's built to last in potable water service. Compact enough to fit through standard doorways, with replacement bundles available to extend service life well beyond original expectations.
- Models: PK06, PK08, PK10, PK12
- Type: Semi-instantaneous indirect — heated by boiler, steam, or HTW
- Output: Up to 250 gallons per minute
- Shell: Solid 90-10 copper-nickel (corrosion-resistant)
- Tubesheet: Naval brass construction
- Controls: ANTICIPATOR integral control system (±4°F)
A fully packaged water-to-water domestic hot water system — the DURATION III pairs a high-efficiency heat exchanger with integrated storage in a single skid-mounted unit. Engineered to complement any condensing boiler source, it simplifies installation by eliminating field-assembled piping between separate components while delivering low cost of ownership through efficiency and durability.
- Type: Water-to-water with integrated storage
- Design: Fully packaged — single skid-mounted unit
- Compatibility: Engineered for any condensing boiler source
- Advantage: Eliminates field-assembled piping between components
- Application: High-recovery DHW for institutional facilities
A gas-fired condensing boiler and storage tank combined in a single skid-mounted package — designed to produce domestic hot water with minimal to no scale buildup. Water-to-water heating with an isolated domestic water loop eliminates the need for mixing valves and provides precise temperature regulation.
- Models: MnR300 – MnR1050 (pool variants available)
- Capacity: 300 – 1,050 MBH input
- Recovery: 18 – 66 GPM at 60°F temperature rise
- Heat Exchanger: Stainless steel brazed plate (indirect section)
- Controls: NURO touch-screen with modulation
- Venting: Polypropylene, stainless steel, or CPVC
More Than Equipment.
Complete DHW Partnership.
When you buy a Patterson-Kelley indirect water heater through ICA, you get factory-authorized support from system design through decades of service — not just a box on a truck.
Built for Every
Boiler-Fed DHW System
Indirect water heaters are the backbone of DHW systems in facilities with existing boiler plants — from hospitals to universities.
Common Questions About
Indirect Water Heaters
Quote or Design?