Installing an Outdoor Wood Boiler: Step-by-Step Guide

Installing an outdoor wood boiler properly is what makes it operate safely and efficiently for decades. Here's the sequence we walk customers through.

1. Read the Manual, Talk to Dealers

Your manual covers foundation layout, electrical needs, recommended setbacks, water treatment, and warranty terms. If you don't have one, contact your dealer. Online communities (Facebook groups for outdoor wood boilers, for example) are also a good resource for real-world experience.

2. Call Your Insurance Company

Verify any setback or policy requirements before you install — use whichever is greater, the manufacturer's recommended distance or your insurer's required distance. Some insurers even offer a discount since the heat source is outside the home.

3. Find the Right Location

Choose a spot away from windows, doors, vents, propane tanks, and other flammable sources. The east side of a building (downwind of prevailing winds) is often preferred. The site should be level, accessible in winter for loading, and positioned for a reasonably direct PEX run to the buildings being heated — while accounting for utilities, hard surfaces, root systems, and property-line setbacks.

4. Prepare the Site

Clear combustible material around and above the site. A concrete pad is ideal, with at least 6" of clearance on the sides and 4' in front. Inside the home, confirm you have an open 15–20 amp breaker spot, plan your PEX entry point (rim joist or core-drilled foundation), and plan your runs to the water heater or HVAC system.

5. Trench and Run the PEX

Trench at least 24" deep (more if crossing a path used by vehicles or heavy machinery). Never make PEX connections underground — that's just an invitation for leaks. At each end of the trench, dig down to about 48" so the pipe can arch up out of the ground straight. Pressure test the line before backfilling, and keep rocks larger than a baseball away from the pipe — sand is the best backfill material.

6. Connect the Boiler

Route the PEX through the bottom of the stove into the cabinet without any breaks, connect supply and return lines, and connect your underground electrical. If the boiler sits at or below house level, pumps often go on the back of the boiler; if it's more than 10' higher than the house, consider placing pumps inside instead. Always confirm power is off at the breaker before connecting.

7. Assemble Accessories and Connect to Your Heating System

Attach the chimney, water gauge, and other accessories per the manufacturer's instructions, then connect to your home's heating system — forced air or hydronic. Installing bypasses at every connection keeps your indoor systems operational if the boiler side ever has an issue.

8. Fill, Light, and Monitor

Fill the system with clean water and run the pump for a few minutes to check for leaks and confirm every component works. Light the first fire per the manufacturer's instructions, then monitor water temperature and burn behavior closely for the first several cycles.

9. Maintain It

Regular cleaning, checking water levels, adding water-treatment chemicals once the system is up to temperature, and sending in your annual water sample (required by Crown Royal Stoves to maintain warranty) are what keep a properly installed system running well over 20 years.