Heating Domestic Hot Water for your Home with a Wood Boiler

Heating Domestic Hot Water for your Home with a Wood Boiler

Some of our customers have had their outdoor wood burner for several years before they learn that they can produce an unlimited supply of FREE hot water from the boiler. This is NOT your fault if you were not aware of this. Your dealer just forgot to offer you this.

But YES, it is true, you can have an endless supply of luxurious domestic hot water from your outdoor wood furnace.  My family loves that hot water because my five daughters shave their legs in the shower, and we never run out. Ever!

I particularly love it because there is no additional cost - except for maybe a log or two. Hehe, I love enjoying this luxury for such a low cost. Don't we all!

And you NEVER have to worry about any outdoor wood boiler water coming out your kitchen sink faucet or showerhead. Using a brazed plate heat exchanger, the heat is transferred from the outdoor furnace water to your domestic water without any water molecules mixing. Awesome!


We make it simple! All the fittings and parts you need tomake this improvement are included in The Domestic Hot Water Kit. If you currently have piping that is not PEX tubing, just let us know so we can include two adapters. This kit also comes complete with simple installation instructions.

Domestic Hot Water Kit

This best-selling kit will give you endless luxurious hot water. If you have any ladies in your home, you will be their hero!

The Outdoor Boiler Domestic Hot Water Kit (PEX) is a kit of all the components needed to connect an outdoor wood boiler to a domestic hot water system to provide endless hot water to the home.  


This kit is the PEX version, and it contains all the fittings needed, along with the water-to-water plate heat exchanger.  The kit does not contain the parts needed to interface with the domestic water system, since those vary (copper, PVC, PEX, etc.). The ports on the hot water heat exchanger that interface with the domestic water are 1" MPT connections for both the domestic side and the outdoor wood boiler side

Why Does the Kit Include a Mixing Valve?

Mixing Valve

All of our Domestic Hot Water Kits include a mixing valve. For safety reasons, building codes require a mixing valve so that super hot water does not come out of a faucet and harm an unsuspecting child (or anyone) who gets a blast of 180-degree water. 

A mixing valve (also known as an "anti-scald valve") prevents this by tempering the hot water to a set temperature by mixing some cold water into the hot water stream. Most homeowners set their mixing valve to provide hot water at 120 degrees.

Where Does the Mixing Valve Go? 

The mixing valve needs to be installed on the domestic hot water side of the plate exchanger. It does not interface with outdoor boiler water, and only mixes fresh, clean, potable water for domestic home use - cooking, bathing, etc. The Domestic Hot Water Kit comes complete with installation instructions that show how the installation should be completed.

Why Does The Mixing Valve Have 3/4 Inch Ports?

Almost every home in America uses 3/4 inch pipes in its plumbing for domestic water used in bathing and cooking. But that is where the similarity ends...because some homes have copper tubing, some have PEX tubing, and other homes have plumbing using PVC pipes.

Why Does My Outdoor Wood Furnace Have ONE INCH Tubing?

Great question! Outdoor Furnaces are hydronic heating systems and so their purpose is not to provide water for cooking or bathing, but rather to transfer heat. Your experts at OutdoorBoiler.com have done tremendous research and development and have discovered that in order to transfer the ideal amount of heat from your outdoor boiler to your home, a one-inch PEX tubing line needs to be the industry best practice, and that is how we have established this "Best Practice" for our industry.

Domestic Hot Water Kit Assembly

Remember, a mixing valve is required by building codes, and that is why we include it in our Domestic Hot Water Kit. But the fittings required to interface with each individual home will depend upon what type of plumbing tubing already exists in the home, again either copper, PVC, PEX, or whatever.

So if you weren't aware that you could have endless hot water with your outdoor boiler, take advantage of our Kit design which greatly simplifies adding this luxury to your home!