A premium pre-insulated flexible piping system designed to transport hot water efficiently from outdoor wood boilers to homes, shops, barns, and commercial buildings – with minimal heat loss and maximum reliability. When you burn wood, every BTU matters. This system ensures more of your heat reaches the building – not the ground.

Typical Applications

Outdoor wood boilers, hydronic home heating systems, shop and garage heating, agricultural buildings, district-style rural heating setups.

Key Advantages

• World-leading energy efficiency with record-low thermal conductivity, tested by an independent  third-party institute
• Reduced operating costs and up to ~15% annual energy savings
• Flexible, easy installation with tight bending radii
• Self-compensating system reduces need for expansion components

The Payback

BRUGG CALPEX pays for itself — and keeps paying. Its factory-bonded PUR insulation delivers consistent, measurable efficiency that field-wrapped bubble pipe simply can’t match. In real-world installations, the gap is often far worse than any lab test suggests. Bubble wrap pipe is vulnerable to moisture infiltration — once water works its way in, heat loss explodes and your savings disappear into the ground. CALPEX eliminates that risk entirely. Closed- cell PUR foam won’t absorb moisture, won’t degrade over time, and delivers the same reliable efficiency on day one as it does twenty years later.

For a 200 ft trench, switching to CALPEX saves approximately 1 to 2 cords of wood per heating season compared to a bubble wrap system — and significantly more once moisture infiltration sets in, which in a buried trench is inevitable. In a harsh northern climate , those savings add up to real money every single winter.

Unlike bubble-wrapped systems where poor installation or a single wet season causes heat loss to spiral permanently, CALPEX delivers consistent performance with no surprises. The pipe that costs a little more upfront is the one that stops costing you every winter.

Actual savings will vary depending on wood quality, boiler efficiency, climate, and the condition of the existing pipe installation.