Heat Pump Explainer
One machine, both seasons: how a heat pump works
Flip the season and watch the same machine run in reverse. No email required. No sales pitch. Just an honest read.
The reversing trick
It doesn't make heat. It moves it.
A heat pump is one outdoor unit that both heats and cools your home. The name undersells it: it never creates heat the way a furnace burns gas. It moves heat from one place to another using a refrigerant, a compressor, and two coils — exactly the way your refrigerator moves heat out of the food compartment (that warm air behind the fridge? Same trick).
hot refrigerant cool refrigerant
Reversing valve — the part that flips the seasons.
In summer — Cooling
Right now it's an air conditioner: heat is being pulled out of the house and thrown away outside.
- 1 Absorb. Refrigerant in the indoor coil soaks up heat from your indoor air — the blower pushes the now-cooler air through the ducts.
- 2 Compress. The compressor squeezes the refrigerant, concentrating that heat.
- 3 Release. The hot refrigerant dumps its heat outdoors through the outdoor coil — that's the warm blast you feel next to the unit.
- 4 Expand & repeat. The refrigerant expands, chills back down, and heads inside for more.
In winter — Heating
Now it's a heater: the same machine grabs heat from the outdoor air and pushes it inside.
- 1 Absorb. Refrigerant in the outdoor coil soaks up heat from the outside air — yes, even a 48° morning holds plenty of heat energy.
- 2 Compress. The compressor squeezes the refrigerant, which raises its temperature sharply.
- 3 Release. The now-hot refrigerant releases that heat into your air at the indoor coil, and the blower sends it through the house.
- 4 Expand & repeat. The refrigerant expands, cools, and heads back outside for more.
| Season | Outdoor coil | Indoor coil | Result inside |
|---|---|---|---|
| Summer (cooling) | Releases heat outdoors | Absorbs heat from your air | Cool air |
| Winter (heating) | Absorbs heat from outdoor air | Releases heat into your air | Warm air |
The only thing that changed between those two rows is the position of one part — the reversing valve. Same coils, same compressor, same refrigerant, running the opposite direction.
Wait — heat from cold air?
Yes. "Cold" air still holds heat energy — refrigerant boils at a very low temperature, so it can soak that heat up even on our coldest mornings. In genuinely cold climates heat pumps need backup heat for deep freezes. In LA and Orange County, where a hard winter morning is 45–50°, a heat pump spends its whole life in the easy part of its operating range. Which brings us to why this matters here specifically.
Mild winters are the whole ballgame.
Heat pump efficiency depends on how far apart the outdoor and indoor temperatures are — the smaller the gap, the less work moving heat takes. LA and OC winters barely make it work: on a typical 50° morning, a modern heat pump delivers roughly 3–4 units of heat for every unit of electricity it uses — because it's moving heat, not making it. A gas furnace, even a very good one, can never give you more heat energy than the fuel it burns.
And our real weather problem isn't January — it's August. Your home already needs serious air conditioning. A heat pump is that air conditioner, with heating included:
- One changeout instead of two. When an aging AC and furnace are both due, one heat pump replaces both — one piece of equipment to buy, maintain, and eventually replace.
- New furnaces here have their own rulebook. Any new gas furnace in the South Coast basin must meet SCAQMD Rule 1111 ultra-low-NOx limits (14 ng/J) — compliant models cost more, which narrows the price gap people assume gas always wins. (This is an emissions limit, not a gas ban — see the FAQ.)
- The 2026 rebate map points the same direction. The programs that still have money are heat pump programs — the honest list is below.
SEER2, HSPF2, and what they mean for your bill.
Two ratings appear on every heat pump's label:
- SEER2 — cooling efficiency across a season. Higher = less electricity per degree of cooling.
- HSPF2 — the same idea for heating.
You don't need to memorize thresholds; here's a useful anchor instead: LADWP's rebate program starts paying above roughly 15.2 SEER2 / 7.7 HSPF2 — and pays more the higher you go. Equipment at or above that line is what "high-efficiency" means in this market in 2026.
Compared with the setup most LA/OC homes have now — a 10–20-year-old AC condenser plus a gas furnace — a properly sized inverter heat pump typically cools more efficiently than the old AC and heats without burning gas at all. Your actual savings depend on your electric rate, your gas rate, your insulation, and your ducts — which is why we quote real numbers per house instead of promising a percentage.
The equipment that makes it real
The equipment that makes these numbers real is inverter-driven — the compressor runs at variable speed, ramping smoothly instead of slamming on/off. Quieter, steadier room temperatures, better dehumidification in cooling. As a Daikin Comfort Pro dealer, Power Pro installs Daikin's inverter line, including the Daikin FIT — a compact side-discharge unit built for exactly the tight side yards LA lots are famous for.
The one thing to check before you fall in love.
A heat pump runs on electricity — a dedicated 240-volt circuit. Whether your panel can host one comes down to a load calculation, not guesswork:
- Newer 200-amp panels: almost always fine.
- Older 100-amp panels (common in pre-1980s LA housing stock): often still workable — modern inverter units draw far less current than old-school equipment, and a load calculation frequently proves there's room. Sometimes the honest answer is panel work first.
- Not sure what you have? The main breaker's number (100, 125, 200) is printed on the handle. Either way, the load calc happens during the estimate — before you commit to anything.
We tell you which situation you're in before any contract is signed. If panel work is needed, it's a real cost that belongs in the decision, not a surprise afterward.
Two ways to get there.
Ducted heat pump
Uses your existing ductwork; the outdoor unit + an indoor coil/air handler replace the AC-plus-furnace pair. The whole-house option. One honest prerequisite: leaky ducts waste any system you attach to them — duct condition gets checked (and Title 24 duct testing applies to changeouts) before this path makes sense.
Heat pump servicesDuctless mini-split
No ducts needed. Slim wall heads, each its own zone with its own temperature. Made for homes with wall/floor heaters and window ACs, garage conversions, ADUs, additions, and that one bedroom that never cools down. Because there are no ducts losing conditioned air, mini-splits are among the most efficient systems you can own.
Real LA & OC numbers, honestly framed.
Published area ranges (third-party cost guides, 2026 — your house will be quoted, not averaged):
| Path | Published LA/OC range |
|---|---|
| Ducted heat pump (replaces AC + furnace) | $9,000–$18,000 installed; 3-ton typical ~$14,000, before rebates |
| Ductless mini-split — single zone | $4,000–$7,500 |
| Ductless mini-split — multi-zone whole home | $10,000–$18,000 |
| For comparison: furnace + AC combo (existing ducts) | $8,000–$15,000 |
The 2026 rebate truth
- The big 2024–2025 money is gone. Federal tax credits (25C/25D) ended for installs after December 31, 2025 — no 2026 installation qualifies, and any site or salesperson telling you otherwise is wrong. California's TECH Clean California and HEEHRA rebates are fully reserved (waitlist only). This page never counts dead money in your math.
- LADWP customers (City of LA): up to $2,500 per ton on qualifying heat pumps through the Consumer Rebate Program — on a typical 3-ton system that's meaningful money. Funding is limited and not guaranteed; the application needs your paid invoice, the AHRI certificate, and the finalized permit, within 12 months.
- SCE territory (most of OC + LA County outside the city): instant equipment discounts of $300–$600 per ton on qualifying heat pumps, applied at purchase through participating distributors — no application. Ask us whether your equipment qualifies.
- Heat pump water heaters ride along: LADWP also pays up to $2,500 per unit on qualifying heat pump water heaters — if you're electrifying anyway, the water heater is often the easy second step.
- Financing exists for the gap — see financing for current plans and the real fine print.
We quote both paths — heat pump vs. furnace + AC — side by side, net of the rebates you actually qualify for. Free estimate: (833) 212-2124.
The honest part.
We install heat pumps every week. We'd still talk you out of one in these situations:
- 1
Your furnace is young and your AC works.
Replacing healthy equipment almost never pays back. If your furnace is under ~10 years old and only the AC is dying, a straight AC replacement — or a "dual-fuel" setup that adds a heat pump and keeps the furnace as backup — is usually the smarter spend. We'll tell you which.
- 2
Your panel needs a big upgrade and the budget is already tight.
If the load calc says panel work first, that's real money before any comfort improvement. Sometimes the pragmatic changeout today is an ultra-low-NOx furnace + high-SEER2 AC — fully code-compliant — with the panel handled later on its own schedule.
- 3
Your electric rate makes the math ugly.
LA-area electricity is among the most expensive in the country, and gas here is comparatively cheap. In a poorly insulated house with big heating hours, a heat pump's efficiency can still lose to gas's price per unit of heat on the winter bill. This is exactly what the side-by-side quote is for — we run your rates, not a national average.
- 4
Your ducts are shot and you won't fix them.
A leaky duct system wastes 15–25% of whatever you attach to it. If the duct repair isn't in the budget, a high-end heat pump is jewelry on a broken chain — fix the ducts first, or go ductless.
- 5
You're selling within a couple of years.
The payback lives in years 3+. If you're listing the house next spring, put the money where the appraisal sees it.
None of this is a reason to avoid learning about heat pumps — it's the reason to get an assessment that's allowed to say "not yet."
Honest Fit Check
Does a heat pump fit my home?
Three questions. No email required. No sales pitch. Just an honest read.
Question 1 of 3
What's your current situation?
Who's your electric utility?
What's your electrical panel?
Your honest read
You're the textbook case.
When both halves of the system are due at once, one heat pump changeout replaces both — one install, one piece of equipment to maintain, and the strongest version of the cost math, because you'd be spending on two machines anyway. Published LA/OC range for a ducted heat pump: $9,000–$18,000 installed before rebates; a furnace + AC pair runs $8,000–$15,000.
Not for you if: your ducts are in bad shape and fixing them isn't in the budget — leaky ducts waste any system. Duct condition is the first thing the estimate checks.
Good fit — with an honest asterisk.
A heat pump can replace just the AC and simply out-vote your furnace most of the winter (the furnace stays as backup — that's a "dual-fuel" setup), or replace both. But if your furnace is young and healthy, a straight AC replacement may be the smarter spend this round. This is exactly the side-by-side quote situation: AC-only vs. dual-fuel vs. full heat pump, real numbers.
Not for you if: the furnace is under ~10 years old and the budget only covers one move — a like-for-like AC swap is the defensible choice, and we'll say so.
Skip the ducts entirely — you're a mini-split home.
Homes with wall heaters and window units are the single best mini-split story: every head heats AND cools its zone, no ductwork ever gets built, and the window units retire. Published LA/OC ranges: single zone $4,000–$7,500; whole-home multi-zone $10,000–$18,000.
Not for you if: you need every room conditioned on a tight budget — multi-zone costs scale per head, so we sometimes phase it: main rooms first, bedrooms later.
Honest answer: don't replace working equipment.
The efficiency gain almost never justifies scrapping a healthy system early. The right move is knowing your plan for when it's due: get a baseline tune-up, know your panel situation (see below), and when the AC or furnace starts limping, you'll already know whether a heat pump is your changeout. Bookmark this page for that day.
Not for you if: — this IS the not-for-you result; it exists so the other three stay credible.
Your rebate picture (LADWP)
You're in the best rebate territory in Southern California right now: LADWP's Consumer Rebate Program pays up to $2,500 per ton on qualifying heat pumps (and up to $2,500 on qualifying heat pump water heaters). Funding is limited and first-come; the application needs the paid invoice, AHRI certificate, and finalized permit within 12 months.
Your rebate picture (SCE)
SCE territory gets instant equipment discounts of $300–$600 per ton on qualifying heat pumps through participating distributors — no application, applied at purchase. Ask us whether the equipment we'd quote qualifies.
Your rebate picture
Easy check: your electric bill's logo — LADWP means City of LA and the strongest rebate (up to $2,500/ton); SCE means instant equipment discounts of $300–$600/ton. One thing that's true everywhere: federal heat pump tax credits ended for installs after 2025 — count no dead money in your math.
Your panel situation
Panel-wise you're clear — 200 amps hosts a heat pump comfortably. The load calculation during the estimate is a formality.
Your panel situation
Older 100-amp panels are often still workable — modern inverter heat pumps draw far less current than people assume, and a load calculation frequently proves there's room. Sometimes the honest answer is panel work first; either way you'll know before you sign anything, not after.
Your panel situation
Open your panel door: the big main breaker has the number printed on the handle — 100, 125, or 200. Or just leave it to the estimate: the load calculation is part of it, free, before any commitment.
Want real numbers for your house? We quote a heat pump and a furnace + AC combo side by side, net of the rebates you actually qualify for — free.
Heat pump questions, answered
How does a heat pump work in simple terms? +
It moves heat instead of making it. In summer it pulls heat out of your house (that's air conditioning); in winter a reversing valve flips the refrigerant's direction and the same machine pulls heat out of the outdoor air and moves it inside. One system, both jobs.
Do heat pumps work during an LA heat wave? +
Yes — in cooling mode a heat pump IS a central air conditioner, and modern inverter units are rated well beyond our 100°+ days. Sizing is what matters: a proper load calculation, not a rule of thumb, decides the tonnage.
Do heat pumps really heat well enough in winter here? +
LA and OC winters are the easiest assignment a heat pump can get. Cold-climate concerns (backup heat, defrost cycles eating efficiency) apply to places with real freezes — a 45–50° SoCal morning keeps a heat pump in the strongest part of its range, typically delivering 3–4 units of heat per unit of electricity.
What's the difference between a heat pump and an air conditioner? +
Mechanically, almost nothing — both move heat with refrigerant. The difference is the reversing valve, which lets a heat pump run the cycle in both directions. An AC only cools; a heat pump cools in summer and heats in winter.
Is a mini-split the same thing as a heat pump? +
Yes — a ductless mini-split is a heat pump without ductwork. Each wall head heats and cools its own zone through the same reversal trick.
What rebates can I actually get in 2026? +
The honest list is short: LADWP customers (City of LA) can get up to $2,500 per ton on qualifying heat pumps; SCE-territory customers can get instant equipment discounts of $300–$600 per ton through participating distributors. Federal tax credits ended for installs after December 31, 2025, and California's TECH/HEEHRA rebates are fully reserved — anyone counting that money in a 2026 quote is selling with expired coupons.
Will my electrical panel need an upgrade? +
Maybe — it's a load calculation, not a guess. Newer 200-amp panels are almost always fine; older 100-amp panels often still work with modern inverter equipment, and sometimes the honest answer is panel work first. You'll know before you commit, and the cost belongs in the decision up front.
Is gas heating being banned in Southern California? +
No. What's real: SCAQMD Rule 1111 limits NOx emissions from new gas furnaces in the basin (ultra-low-NOx, 14 ng/J), and zero-NOx compliance pathways are being phased in for NEW equipment sales over the coming years. Your existing furnace is not being confiscated — but the rules make each new gas furnace more expensive, which shifts the changeout math.
What does a heat pump cost in LA or Orange County? +
Published area ranges: ducted systems $9,000–$18,000 installed (3-ton typical around $14,000) before rebates; single-zone mini-splits $4,000–$7,500; whole-home multi-zone $10,000–$18,000. Those are market ranges, not our quote — your house gets real numbers, side by side with the furnace + AC alternative.
Why Daikin? +
Power Pro is a Daikin Comfort Pro dealer — factory-trained on Daikin's inverter systems, installing to manufacturer spec, backed by the Daikin Comfort Promise (install concerns resolved at no cost within one year) and a 12-year parts limited warranty on qualifying systems. California nuance worth knowing: state law means you keep full warranty coverage even without registering — though registering still speeds up claims.
Want real numbers for your house?
Free estimate — we quote a heat pump and a furnace + AC combo side by side, net of real rebates.
