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Step 1 — Load calculation (Manual J).
Do not rely on square footage alone. Oversizing or undersizing can affect comfort, run time, humidity control, noise and energy use.
A load review should consider insulation, window exposure, room layout, duct condition, air leakage, sun exposure and local microclimate. A home in Sherman Oaks can have a different cooling and heating profile than a similar-size home near the coast.
What HUS does: Home Upgrade Specialist reviews load sizing, ductwork, electrical capacity, comfort goals, and equipment options before recommending a heat pump system. This helps avoid guessing based only on square footage.
Step 2 — Equipment selection.
| Option to Compare | What to Verify | Why It Matters |
|---|---|---|
| Daikin Fit or similar side-discharge inverter systems | Exact AHRI match, rating, sound data, clearance, warranty registration and installer experience | Can be a strong fit where compact outdoor equipment, quieter operation and heat-pump comfort are priorities. |
| Bosch IDS or similar ducted inverter systems | Indoor equipment match, thermostat setup, sound rating, duct compatibility and service path | Useful to compare for ducted homes where variable-speed comfort and existing ductwork matter. |
| Mitsubishi or other ductless/multi-zone options | Room load, indoor head style, line-set routing, electrical scope and warranty terms | May fit ADUs, additions, rooms without ducts or homes where targeted comfort is needed. |
| Goodman, Trane or other traditional split options | System match, efficiency rating, warranty terms, parts access, installed price and service support | May fit homes where budget, brand familiarity, ducted comfort and service access are key decision factors. |
For many LA homes, the Daikin Fit is worth reviewing when the homeowner wants a quiet, compact, inverter-style system. Goodman, Bosch, Mitsubishi, and Trane options may also fit depending on budget, ductwork, electrical capacity, and comfort goals. For a wider comparison of manufacturers, see our roundup of the best HVAC brands in Los Angeles for 2026, or read our dedicated Daikin Fit heat pump Los Angeles guide.
Step 3 — Incentive review before install.
Incentives only apply when the project, equipment, utility territory, homeowner status, and program funding meet the current rules. See the complete LA incentive stacking guide. For a heat pump project in Los Angeles, review these possible pathways before relying on any savings assumptions:
| Program / Pathway | Eligibility Review | Review Timing |
|---|---|---|
| Heat pump program pathway | Eligibility varies by current program rules, funding, equipment, income status, utility territory, and approval | Reviewed before preparing an estimate or discussing project economics; approved discounts depend on program confirmation |
| Federal tax review pathway | Varies by current tax law and homeowner tax situation | Customer/tax professional review; HUS can provide project documentation |
| LADWP heat-pump incentive review (if LADWP territory) | Eligibility varies by LADWP rules and funding | Reviewed after equipment, address, and inspection requirements are confirmed |
| SCE heat-pump incentive review (if SCE territory) | Eligibility varies by SCE rules and funding | Reviewed after address, equipment, and program requirements are confirmed |
| COMBINED INCENTIVE REVIEW | Not guaranteed; depends on approval | — |
Common mistake: Assuming an incentive is automatic. HUS reviews equipment requirements, utility territory, customer eligibility, funding, documentation and program timing before discussing any incentive-related savings.
Step 4 — Permitting.
LA heat pump installs require:
- →Mechanical permit (LADBS or city) — for the heat pump installation itself
- →Electrical permit (LADBS or city) — if circuit upgrade or panel work is required (typical for older homes upgrading from gas-only)
- →Airflow, HERS or related verification when required by the project scope and current California energy-code rules
Permit timing depends on the local jurisdiction, project scope, electrical work, documentation and inspection availability. Confirm who submits permits and who coordinates inspection scheduling before work begins.
Step 5 — Installation and commissioning.
Day 1: Remove old equipment such as the gas furnace, AC compressor, and outdoor condenser when replacement is part of the approved scope. Recover refrigerant and address the gas line according to the project plan.
Day 2: Install the heat pump outdoor unit and indoor air handler or matched coil, reuse existing ductwork if compatible, connect refrigerant lines, install the thermostat, and commission the system.
Many straightforward projects take 1 to 2 installation days, but timing can vary with electrical work, duct corrections, equipment availability, city inspections, and home access.
Step 6 — Final inspection + utility coordination.
Final inspection verifies the permitted mechanical and electrical scope. If gas equipment is removed, confirm gas-line scope, utility coordination, safety requirements and any possible program documentation in writing.
Total elapsed time from contract signing to a fully operational system depends on permit timing, equipment availability, utility coordination, inspection scheduling, and whether electrical or ductwork corrections are needed. For planning help, compare this article with our heater replacement Los Angeles guide and our AC replacement Los Angeles guide.
Heat pump switch checklist
- 1Confirm the current furnace, AC, ducts, return air, filter access, thermostat and electrical panel condition.
- 2Ask for exact model numbers, AHRI match, warranty terms, sound data, controls and permit requirements.
- 3Review whether the project should be coordinated with solar planning, Powerwall, EV charging or a future panel upgrade.
- 4Separate confirmed costs from rebate, financing and tax assumptions, which depend on current rules and eligibility.
Ready to switch?
Get your heat pump estimate.
Review system sizing, ductwork, electrical capacity, equipment options, permit steps and incentive assumptions before choosing a heat pump. Program rules, funding, utility territory, equipment eligibility and tax treatment can change.
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