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 Larkspur home from gas heat to a heat pump? HAXX sizes the system, checks the panel and files the permit in eTRAKiT.
Serving Downtown Larkspur along Magnolia Avenue, Madrone Canyon, Greenbrae, Larkspur Landing and Murray Park and the rest of Larkspur. 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.
Larkspur takes every building permit digitally through eTRAKiT, with no over-the-counter issuance. MCE, the city's electricity provider, lists heat pump rebates offered through its contractor network.
Furnace and AC replacements are simple permits in Larkspur, and AC work needs a site plan. HAXX confirms the category for a heat pump with the Building Division and prepares the documents.
MCE lists rebates for heat pump heating and cooling through participating contractors. Use its Rebate and Incentive Finder and confirm current terms with MCE.
Homes near the downtown historic district and in the canyons often have small ducts or none. HAXX chooses ducted, slim-ducted or ductless to suit the layout.
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
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 lists rebates for heat pump HVAC through participating contractors, and Marin County's Electrify Marin site lists other incentives. Amounts and availability change, so confirm eligibility with MCE.
Larkspur lists simple permits, which include furnace and AC replacements, at about 2 to 3 working days of review once the submittal is complete. HAXX submits through eTRAKiT.
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.
