SpacePak
Small-duct central HVAC and air-to-water heat pumps for retrofit and high-performance homes.
What they're known for
A compact mechanical platform for houses where conventional ductwork, wall units, or fossil-fuel hydronics are poor fits.
SpacePak builds residential heating and cooling systems around compact distribution. Its Small Duct High Velocity platform uses flexible two-inch ducts that can be routed through existing wall, floor, and ceiling cavities, making it especially relevant to retrofits and architecturally sensitive homes. The Solstice line adds air-to-water heat pumps for hydronic heating, cooling, and domestic-hot-water support, including cold-climate models rated for operation down to -22°F.
Performance focus
- Thermal Comfort
- Humidity
Notable products
We haven't catalogued their full line in the directory yet. These are the entries worth knowing.
- Catalog entry
Small Duct High Velocity System
Compact central-air distribution using flexible two-inch ducts
- Catalog entry
Solstice R32 Series
Cold-climate monobloc air-to-water heat pump for hydronic heating, cooling, and domestic hot water
- Catalog entry
Solstice R454B Series
Higher-temperature air-to-water heat pump for broader hydronic and retrofit applications
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Sources
Facts verified October 2026. Compound is an independent editorial directory and is not affiliated with this company unless stated.