Load calculation
Equipment sized to the house, its windows and insulation, not to the old unit's label.
Adding cooling to a Millbrae home or replacing an old AC? HAXX installs heat pumps that cool in summer and heat in winter, with permits handled.
Serving Mills Estates, Millbrae Highlands, Millbrae Meadows, Meadow Glen, Green Hills and Telescope Hills and the rest of Millbrae. Share your address to confirm availability.

Central air conditioners and heat pumps that also cool. Every installation starts with sizing and a look at your ducts and electrical panel, not with a model number.
Equipment sized to the house, its windows and insulation, not to the old unit's label.
Compare a straight AC with a heat pump that also heats. In many homes the heat pump costs little more and replaces the furnace later.
Leaky or undersized ducts waste a new system. HAXX checks airflow before quoting.
Circuit, disconnect and panel capacity reviewed by HAXX electricians before install day.
American Standard and Mitsubishi Electric, among others, matched to the home and budget.
Mechanical and electrical permits pulled, city inspection scheduled.
Many Millbrae houses were built without air conditioning. Installing a heat pump instead of a cooling-only AC adds cooling and can retire the gas furnace at the same time.
A heat pump provides the same cooling as an AC and also heats. When it replaces gas heating it can qualify for WestLight Energy (formerly Peninsula Clean Energy) rebates.
Where there are no ducts or the old ones are too small, ductless or slim-ducted units cool bedrooms and living areas without major demolition.
Installing a new air conditioner requires a City of Millbrae permit. HAXX files it and attends the inspection.
Rated 4.8 across 515+ reviews on Housecall Pro, Google and Facebook. Read more reviews.
“Thorough diagnostics of A/C system, identified and repaired the issue quickly!”
“Service was performed well and on time. Service person was highly skilled and provided easy to understand options to deal with the issue. Price for diagnostics was reasonable and easy to pay online.”
“Our commercial building had several HVAC problems, and their team carefully diagnosed each unit, explained the available options, and never pressured us into unnecessary replacements. They worked hard to repair what could be repaired and kept us informed throughout the process.”
Existing equipment, home layout and what you want to improve.
Sizing, airflow, equipment placement and electrical needs.
Options, exclusions, permit requirements and any eligible incentives.
Confirm equipment, scheduling and handover details with HAXX.
A closer look at recent heating and cooling work by HAXX.

On site during a commercial VAV box repair: access above a suspended ceiling, equipment and the work in progress.
Explore recent projects
Outdoor heat pump installation.

Lennox ac installation.

Attic plenum resealing.

American standard rooftop package unit.

Heat pump installation.

Heat pump air handler installation.

Heat pump air handler service.

Compressor replacement.
Most owners choose a heat pump, since it also heats and can qualify for WestLight Energy rebates when it replaces gas. HAXX quotes both if you want to compare.
Most replacements take one to two days, plus a city inspection. Adding ducts or a panel upgrade can extend that.
Most replacements take one to two days on site. Permits, equipment lead times and any electrical work add to the overall timeline.
A heat pump cools exactly like an AC and also heats. If your furnace is aging, it is worth comparing both on the same estimate.
Share the property, equipment and questions you have in mind.
(408) 901-8315
Call HAXX to discuss your property and scheduling.
