Oil-to-heat-pump conversions in Clark County typically run $14,600–$29,300 installed, before rebates. The Clark PUD rebate stacks well for oil-to-electric conversions ($1,200+ tier). Real cost drivers: electrical panel capacity, oil tank decommissioning ($1,500–$4,000 separate), ductwork condition, and whether you go ducted or ductless. Oil-heated homes save $1,200–$2,500 per year in fuel cost after conversion. Payback is usually 7–11 years before rebates, 5–9 years after.
If your home was built before 1980 in Vancouver, the original heat source was probably oil. Many of those homes still have oil furnaces — sometimes the original equipment, more often a 1990s replacement that is now 30+ years old. The conversion to heat pump is one of the cleanest "remove all the legacy mechanical from the basement" projects we do, and it is the only HVAC project where the energy savings genuinely cover the install cost in a reasonable timeframe.
Why oil-to-heat-pump is uniquely good math.
Oil heat is expensive. NW residential heating oil ran $4.40–$5.20 per gallon through the 2025–2026 heating season. A typical 2,000 sq ft Vancouver home with an oil furnace burns 600–900 gallons per year — roughly $2,600–$4,700 annually in fuel.
The same home heated by a modern heat pump uses roughly 6,000–10,000 kWh of electricity per year. At Clark PUD's $0.10/kWh, that is $600–$1,000 annually. Annual fuel cost drops by $1,500–$3,500.
Compare to gas-to-heat-pump conversions, where the annual fuel cost difference is more like $300–$700. Oil conversions pay for themselves in a way gas conversions do not.
What the conversion actually involves.
1. Site assessment.
Before any equipment talk, we evaluate three things:
- Existing ductwork. Many oil-furnace homes have ductwork; many do not. Homes with hydronic (water-based) oil heat — radiators, baseboards — usually have no air ductwork and need either retrofit ducting or ductless.
- Electrical panel capacity. Most pre-1990 homes have 100A service. A heat pump conversion usually pushes that toward the limit, especially if the home still has an electric water heater or dryer. A 200A service upgrade runs $3,000–$5,000 in Vancouver.
- Oil tank status. Above-ground basement tank or underground tank? Empty? Half-full? Each path has different decommissioning requirements and costs.
2. Equipment selection.
Three common configurations for oil conversions in our climate:
- Ducted heat pump using existing ducts. If the ducts are in good shape (sealed, sized correctly, insulated where exposed), the simplest path. The oil furnace gets removed entirely. New air handler goes in the same closet or basement bay. Outdoor heat pump unit gets a new pad somewhere with good airflow.
- Ducted heat pump with duct retrofit. If ducts are leaky, undersized, or partially uninsulated. We do duct sealing or partial replacement as part of the project. Adds $2,000–$5,000.
- Whole-home ductless. Best path for hydronic-heated homes (no existing ducts). Typical setup: one outdoor unit, 4–6 indoor heads strategically placed. Higher upfront cost than ducted but no duct retrofit, fully zoned comfort, and the radiators can stay in place if removal is invasive.
3. Oil tank decommissioning.
Separate from the HVAC work, the oil tank needs to be properly decommissioned. The protocol depends on the tank type:
- Above-ground basement tank, empty: Cut up and removed by oil-tank specialist. $1,500–$2,500.
- Above-ground basement tank, partial fuel: Fuel pump-out first (varies, $200–$500), then decommissioning. $1,800–$3,200 total.
- Underground tank (UST): Most expensive scenario. Requires excavation, soil sampling, and DEQ-compliant removal. $3,500–$6,500. Some clients opt for "in-place abandonment" (tank cleaned, filled with sand, sealed) instead — $1,800–$3,200.
We do not do tank work in-house — it requires specialty licensing. We coordinate with one of three Vancouver-area tank decommissioners we work with and roll their quote into the project plan.
4. Electrical work.
Almost every oil conversion involves at least some electrical work. Common scope:
- New 220V dedicated circuit for the heat pump outdoor unit (~$400–$700)
- New 240V circuit for air handler / electric strip backup (~$300–$500)
- Panel upgrade from 100A to 200A if needed (~$3,000–$5,000)
- Sub-panel installation if main panel is far from new equipment (~$1,200–$2,000)
5. Removal of oil-related infrastructure.
Once the new system is running and the tank is decommissioned, the rest of the oil infrastructure can be removed:
- Oil furnace itself
- Oil supply line from tank to furnace
- Chimney liner if no other appliance uses it
- Fuel oil filter, supply pump (if applicable)
Most clients want it all gone. Some keep the chimney in case of a future gas appliance.
Total project cost ranges.
Real Clark County numbers for oil-to-heat-pump conversions we have done in the last 18 months:
| Scope | Range |
|---|---|
| Ducted heat pump, existing good ducts, basement above-ground tank, no panel upgrade | $14,600 – $19,400 |
| Ducted heat pump, partial duct retrofit, above-ground tank, no panel upgrade | $17,800 – $23,000 |
| Ductless whole-home, hydronic-heat conversion, above-ground tank, 200A panel upgrade | $25,100 – $33,500 |
| Ducted heat pump, panel upgrade, underground tank removal | $23,000 – $29,800 |
These include everything: equipment, labor, permit, oil-tank decommissioning, electrical, duct work (if any), startup, and 12-year warranty.
What rebates apply.
Oil-to-heat-pump conversions stack uniquely well in Clark County because the utility actively wants oil-heated homes off oil:
- Clark PUD heat pump rebate — Oil conversions qualify under the "non-electric heat source" tier. For ducted: up to $1,200. For ductless: $1,500 first head + $250 each additional.
- Manufacturer rebate — Typically $300–$700 from Mitsubishi or American Standard.
- Federal 25C tax credit — Expired Dec 31, 2025. Not applicable to 2026 installs.
- HEAR program (when it launches) — Income-qualifying households may get up to $8,000 from the state. Best timing: launch expected in WA in late 2026.
Net rebate value for a typical oil conversion: $1,500–$2,250 immediate, plus potentially $4,000–$8,000 if HEAR is available when you install.
If your tank is failing or leaking
An oil tank with active leaking is a different conversation. Soil contamination requires DEQ involvement, possible cleanup orders, and significantly higher decommissioning costs. We do not handle that side — but we work with environmental remediation companies who do, and we can coordinate. If you suspect a leak (smell, basement floor staining, ground saturation near a buried tank), get the tank evaluated before scheduling HVAC work.
Why timing matters.
Oil prices spike in November–February. Tank pump-outs and emergency decommissionings cost more in winter. Heat pump installs in summer are easier, faster, and cheaper because we are not racing to keep a home heated.
Best window for an oil conversion: May–August. We schedule them through fall as well, but the smoothest installs happen in summer when oil is empty (or near empty) and the existing furnace can be cut out without urgency.
The bottom line.
If you are still on oil heat in Vancouver, the conversion math is one of the strongest cases in residential HVAC. Annual fuel savings of $1,500–$3,500, rebates stacking aggressively, and the long-term direction of fuel pricing all point the same way. Payback periods of 5–9 years are realistic. Once the project is done, the home is dramatically simpler to maintain — no more oil deliveries, no more tank monitoring, no more chimney inspections.
If you are at the front of this decision, request a quote. We will walk through the existing system, evaluate the tank and electrical, and build out the full project scope so you see the real number — not a teaser.