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Spacepak High-Velocity HVAC Installation & Service

Spacepak small-duct HVAC installation and repair in SF. The smart choice for older homes without ductwork.

Experienced Spacepak Service Provider

Small-Duct Systems for Older Homes Without Traditional Ducts

Hydroflow has extensive experience installing and servicing Spacepak high-velocity heating and cooling systems. Our technicians are trained to handle small-duct technologies, ensuring quality installation and reliable service in San Francisco and Marin County. Spacepak is an industry leader in small-duct high-velocity central air systems — perfect for older San Francisco Victorians and Edwardians where traditional 6-inch ductwork simply won’t fit through existing walls and ceilings.

Spacepak Systems We Install:

  • Solstice Inverter Heat Pumps — rated for low temperatures down to -22°F, with high-efficiency operation
  • High-Velocity Cooling — small-duct central AC for homes without existing ductwork
  • Combination Heating & Cooling — single system handles both, with zoned control options

Why Choose Spacepak

The Right System for San Francisco’s Victorian Architecture

Traditional HVAC systems require 6-inch supply ducts that must be routed through walls and ceilings. In a San Francisco Victorian or Edwardian with plaster walls, existing framing, and no attic access, this is often impossible without destroying finishes. Spacepak’s 2-inch flex tubing fits through existing wall cavities and can be run without major demolition. The high-velocity, small-volume delivery system provides excellent room-level comfort, dehumidification, and consistent temperature — without the visual intrusion of exposed ductwork.

Why Spacepak Fits SF Homes:

  • 2-Inch Flex Tubing — fits through walls traditional ductwork can’t reach
  • No Major Demolition — runs through existing cavities in Victorian and Edwardian framing
  • Superior Dehumidification — high-velocity delivery removes moisture better than traditional systems
  • Consistent Comfort — eliminates the hot/cold spots common with standard forced air
  • Radiant-Compatible — can complement a radiant heating system for year-round control

Spacepak FAQ

Why is my Spacepak system blowing weak air?

Spacepak is a high-velocity system — airflow should be strong at the vents. Weak airflow almost always indicates a clogged filter or restricted return air duct. Check your filters first. High-velocity systems pull a large volume of air through smaller filters, so they load up faster than traditional systems.

Why is my Spacepak system noisy?

These systems are designed to be quiet. A ‘whooshing’ noise at vents often means the system is unbalanced or the sound attenuators (special tubing near the end of each run) are missing or damaged. Rattling usually indicates a loose blower wheel. Both are service items we can address.

Does my Spacepak heat pump work in cold San Francisco winters?

Yes — the Solstice Inverter heat pumps are rated down to -22°F for some models, so SF winters are well within operating range. Efficiency drops as outdoor temperature falls, but SF rarely sees temperatures that would challenge even a standard heat pump.

How often should I change Spacepak filters?

More often than you’d think. High-velocity systems move a large volume of air, so filters load up quickly. We recommend checking filters monthly and replacing at least every 3 months. Neglecting filters strains the high-pressure blower and reduces system efficiency significantly.

Schedule Your Spacepak Service Today

Small-duct high-velocity installation, maintenance, and repair for San Francisco Victorians and Bay Area homes.

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