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 Cotati home from a gas furnace to a heat pump? HAXX sizes the system, checks the panel and prepares the City permit package.
Serving the downtown Plaza around La Plaza Park, Old Redwood Highway, the Gravenstein Highway corridor, Stony Point Road and the area near Kotate Park and the rest of Cotati. 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 Cotati publishes a guide to electrifying your home. It lists heat pump permits as over-the-counter, with extra paperwork when a heat pump replaces a gas furnace or AC.
For a gas-to-heat-pump conversion, Cotati's guide calls for a site plan, equipment spec sheets and a sound calculation at the nearest property line.
Cool, foggy summers and chilly nights mean heating drives the sizing in Cotati. HAXX runs a room-by-room load calculation instead of matching the old furnace.
Cotati is a member city of Sonoma Clean Power, which lists rebates for qualifying heat pumps. Confirm current terms and eligibility with SCP.
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“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.
A building permit from the City of Cotati. Gas conversions also need a site plan, spec sheets and a sound calculation. Applications can go through Cloudpermit, the City's online portal.
Sonoma Clean Power lists rebates for qualifying heat pumps, and BayREN lists other home incentives. Amounts and rules change, so confirm with each program.
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.
