Load calculation and sizing
Equipment is sized to the house, not to the old furnace label. Oversized systems short cycle and cost more.
Replacing an old AC or gas furnace in Oakley? HAXX sizes heat pumps for East County heat, checks the panel and pulls the City of Oakley permits.
Serving Summer Lake, Cypress Grove, Vintage Parkway, the Laurel Road corridor, Downtown Oakley and the Delta waterfront and the rest of Oakley. 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.
In Oakley the cooling load usually sets the size of a heat pump, not the mild winters. A proper load calculation keeps the system from short cycling or falling behind in July.
HAXX runs a room-by-room load calculation that accounts for west-facing glass, attic insulation and the long summer cooling season.
Mechanical and electrical permits are filed through the City of Oakley's online permitting system, and HAXX meets the Building Division inspector.
Oakley is in MCE's service area. MCE lists programs for its customers on its own site; confirm eligibility and terms directly with MCE.
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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.
A correctly sized heat pump cools the same way a central AC does. Sizing for the hottest days, plus sound ducts, is what matters.
In almost all cases. The City of Oakley says only a few project types are exempt, so HAXX confirms with the Building Division, applies online and schedules 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.
