Heating Domestic
Hot Water for your Home with a
Wood Boiler

This first section is for traditional outdoor boilers with (2) line 1 inch Pex Pipe; that does NOT have a built-in heat exchanger, such as Hardy and Hyprotherm Furnace

Copper Sidearm for Heating your Domestic Hot Water

Typical copper sidearm heat exchanger.
24" Copper Side Arm @ $131.00 80,000 BTU
48" Copper Side Arm @ $124.00 90,000 BTU

Stainless Steel Sidearm Heat Exchanger

With 3/4" and 1"pipe thread ports - as shown.
33" Stainless - Single Wall @ $179.00 80,000 BTU
38" Stainless - Single Wall @ $187.00 90,000 BTU




Side arm Heat Exchanger

The side-arm is narrow and is easily mounted to the side of your existing hot water heater, usally at existing fittings such as your drain and pop-up valve with the other two pipes running to your boiler that does NOT have a built-in heat exchanger, such as Hardy and Hyprotherm Furnace

Plate Exchanger for Domestic Hot Water

Simple to install using Pex or existing copper pipe and push fit fittings.

Mixing or anti-scald valve

VERY IMPORTANT! Needed so your kids and guests (or you) don't scald your hands because both of the heat exchangers can produce hot water up to 180F

3/4" Mixing or anti-scald Valve (Sweat) - Lead Free @ $29/97

This first two photos below are side arm/sidearms, for traditional outdoor boilers with 2 Pex lines.

The last 4 photos are about built-in heat exchangers,
in outdoor boilers, requiring 4 Pex lines.

Top sweated connection from side-arm heat exchanger to hot water tank

Be sure to use shut-off valves and an anti-scald valve!
Best for well water because of the larger openings that a plate heat exchanger uses

Mounted pump on a hot water heater for boiler with a built-in heat exchanger

FOUR line hook-up
Link to Hydronic pumps

Video: swapping wiring for summer

Bottom connection from side-arm heat exchanger to hot water tank

Sweated Fittings

Top connection: Simple 'T' brings hot water from your boiler, that has a built in heat exchanger, into your hot water tank

With FOUR line hook-up

Built-in heat exchanger in a HARDY outdoor boiler

Two or four-line hook-up

Installation kit: Everything needed for external built-in heat exchangers, to hook up your hot water heater

Domestic Hot Water Hook-up Kit for FOUR line hook-up

Plate Exchangers for Heating your Domestic Hot Water

A 10 or 20-plate water-to-water plate heat exchanger is all that it usually needed

The way I hooked mine up

Pump at the bottom, mounted to the 'T' that replaced the drain. See our kit

Alternative Method

Pump at pop-up valve: top or side

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