Load calculation and sizing
Equipment is sized to the house, not to the old furnace label. Oversized systems short cycle and cost more.
Swapping a gas furnace or worn-out AC for a heat pump in Napa? HAXX sizes the system, checks the panel and handles the City of Napa permit.
Serving Fuller Park, Napa Abajo, Alta Heights, Browns Valley, Westwood and Shurtleff and the rest of Napa. 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.
The City of Napa is served by MCE for electricity generation, and MCE lists heat pump rebates. The city itself lists outside programs rather than its own rebate.
MCE's heat pump HVAC rebate is paid per square foot of home and excludes systems already installed. Confirm current terms with MCE before you sign.
The warm season in Napa runs from about June into October. A load calculation keeps the system from running flat out on hot afternoons or short cycling in spring.
Period homes in Fuller Park may need new duct runs or a ductless layout. Later homes with attic ducts can usually take a ducted system after a duct check.
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“Their technician was professional, honest, and took the time to explain the problem and the repair process clearly. Instead of pushing for an expensive replacement, they repaired our HVAC system and helped us save a significant amount of money. The work was completed carefully, and our air conditioner is now working well.”
“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.”
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.
MCE, the city's electricity provider, offers rebates on heat pump heating and cooling and on heat pump water heaters for eligible single-family owners. BayREN also lists electrification rebates. Amounts and rules change, so confirm eligibility with MCE.
Yes. Mechanical and electrical work need a City of Napa building permit. HAXX prepares the application and meets the inspector.
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.
