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 propane or gas furnace, or an aging AC, for a heat pump in Calistoga? HAXX sizes the system for valley heat and checks the panel before ordering.
Serving Cedar Street historic district, Pioneer Park area, downtown Lincoln Avenue, Cyrus Creek and Rancho de Calistoga and the rest of Calistoga. 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.
Calistoga homes face hot, dry summers and cool nights, so a heat pump has to be sized for both. Older homes on Cedar Street and near Pioneer Park often need a duct or panel review first.
Afternoon highs above 90 degrees are common in summer. HAXX runs a room-by-room load calculation rather than matching the old unit's tonnage.
Craftsman and Victorian-era houses near downtown often lack attic space or garages, so ductless or compact ducted systems are planned around the house.
MCE supplies electricity for Napa County, with PG&E delivering it. MCE and PG&E list their own customer programs; confirm eligibility directly with them.
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“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.
Yes. Heat pump installs need mechanical and electrical permits from the City of Calistoga. HAXX pulls the permits and is present for the inspection.
It depends on insulation, windows, sun exposure and ducts. HAXX calculates the load for your house instead of guessing from square footage.
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.
