Load calculation and sizing
Equipment is sized to the house, not to the old furnace label. Oversized systems short cycle and cost more.
Switching a Los Altos home from gas heat to a heat pump? HAXX sizes the system, checks the panel and helps you line up City of Los Altos and SVCE rebates.
Serving North Los Altos, Old Los Altos, South of El Monte, Loyola Corners and Woodland Acres and the rest of Los Altos. Share your address to confirm availability.

A heat pump replaces a furnace and AC with one system for heating and cooling. Good results come from sizing, layout and electrical planning done before equipment is ordered.
Equipment is sized to the house, not to the old furnace label. Oversized systems short cycle and cost more.
Keep existing ducts when they are in good shape, or go ductless where ducts are missing, leaky or impossible to run.
HAXX electricians review the panel and service before the install, so a surprise panel upgrade does not appear mid-project.
Mitsubishi Electric and American Standard systems, among others, matched to the home and budget.
HAXX pulls the mechanical and electrical permits and meets the city inspector.
We point you to the rebates your address qualifies for and provide the equipment documentation programs ask for.
Los Altos added its own $1,000 rebate for heat pump HVAC that replaces gas, administered through Silicon Valley Clean Energy and funded from a limited city budget. SVCE offers a separate rebate on top.
The City of Los Altos lists $1,000 for a heat pump HVAC system that replaces gas heating, first come, first served while city funds last. Confirm availability with SVCE before you sign.
The city rebate runs through SVCE, and the city has said eligibility is tied to being an SVCE customer. SVCE also has its own heat pump and electrical incentives.
A 1950s ranch on a quarter-acre lot and a new two-story with a basement need very different equipment. HAXX runs a room-by-room load calculation.
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“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
Heat pump installation.

Outdoor heat pump installation.

Heat pump air handler installation.

Heat pump air handler service.

Lennox ac installation.

Compressor replacement.

Mitsubishi leak detection.

Leaking coil replacement.
The City of Los Altos lists $1,000 for heat pump HVAC replacing gas, administered by SVCE, and SVCE offers its own rebate. Funds are limited, so check current terms with SVCE first.
Yes. HAXX files the mechanical and electrical permits with the City of Los Altos Building Division and is on site for the inspection.
Yes. Bay Area winters are mild, and correctly sized heat pumps heat comfortably through them. Sizing and duct condition matter more than the brand.
Most single-system replacements take one to three days on site. Permits, equipment lead times and any electrical work add to the overall timeline.
Share the property, equipment and questions you have in mind.
(408) 901-8315
Call HAXX to discuss your property and scheduling.
