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 and AC for a heat pump in Dublin? HAXX sizes it for Tri-Valley heat, checks the panel and files the city permit.
Serving West Dublin, Dublin Hills Estates, Emerald Park, Positano, Wallis Ranch and Tassajara Hills and the rest of Dublin. 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.
Dublin's building pages list the 2025 California codes without a local mandate for existing homes, so most owners switch by choice. Sizing for triple-digit afternoons matters more here than near the Bay.
Dublin sees 100-degree days in heat waves. HAXX runs a room-by-room load calculation so the system keeps up upstairs, not only downstairs.
Dublin handles residential HVAC installs without full plan review. HAXX submits through the city's Citizen Self-Service portal with the required HVAC energy form.
Dublin is served by Ava Community Energy, which runs an online incentive finder for home upgrades. HAXX helps you check current offers before you sign.
Rated 4.8 across 515+ reviews on Housecall Pro, Google and Facebook. Read more reviews.
“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.
Dublin's posted codes are the 2025 California codes and list no local electrification rule for existing homes. HAXX confirms what applies when it pulls the permit.
A residential HVAC permit filed through the city's Citizen Self-Service portal, with the HVAC alteration energy form. HAXX handles the filing and 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.
