# Heat Pumps for Older Homes in Sacramento > Heat pumps for older Sacramento homes: pre-1950 houses in Land Park and East Sacramento, building a first duct system, panel capacity and permits. Get an estimate. URL: https://tulesacramentoheatpump.com/heat-pump-older-homes/ Ducted heat pumps for pre-war and mid-century houses, including a first duct system where the house never had one. [Tule Sacramento Heat Pump](https://tulesacramentoheatpump.com/) brings ducted heat pumps to older homes throughout the Sacramento area, from pre-war bungalows in Land Park and East Sacramento to mid-century ranch houses in the county. The work is done by licensed and insured contractors. In an older house, the heat pump is rarely the hard part. The ducts, the electrical service and the room to run both decide the scope. ## Why older houses need a different plan Ducts are the norm in Sacramento: in SMUD’s territory, 93% of single-family homes had central air in the California Energy Commission’s 2019 appliance survey, and a heat pump can take over those ducts once they test well. The oldest houses are where the history varies. Some were built around a floor furnace or a wall heater, some got ducts for a furnace decades later, and some added central air with ducts squeezed into whatever space was left. ### The older-home core of the city The Census Bureau’s American Community Survey shows how concentrated that housing is. Roughly two homes in three (65.7%) in ZIP 95818, which takes in Land Park and Curtis Park, date from before 1950. East Sacramento’s 95819 is close behind: 49.4% predate 1950, 77.8% predate 1960, and 72.1% of its households heat with gas. Citywide, 17.6% of Sacramento’s homes predate 1950. ### And it is converting Over the year from late October 2025 to October 25, 2026, the City issued 145 heat pump permits in 95818 and 146 in 95819, and most were conversions from other heating. House age is context, not a diagnosis: each home’s ducts and panel still have to be checked. ## What happens on the first visit Before any equipment is discussed, the visit maps where air and wire can travel. - **How the house heats now.** A floor furnace, a wall furnace, a ducted furnace with or without central air, and its age and fuel. - **The attic.** Height at the ridge and the eaves, access, insulation depth and whether ducts and an air handler can fit and be serviced. - **The crawlspace.** Clearance under a raised floor, moisture and access, if the house has one. - **Existing ducts.** Size, condition, routes, a leakage test and static pressure where a system exists. - **Materials.** Duct wrap, flue pipe and other materials that could contain asbestos, flagged for testing. - **The electrical service.** Service size, panel type, open spaces and the existing loads. - **The outdoor spot.** Side yard width, fences, windows nearby and the line set route; the [placement and noise guide](https://tulesacramentoheatpump.com/guide/heat-pump-placement-noise/) explains the tradeoffs. The written scope names each part of the work separately: ducts, panel, equipment and any abatement. ## Homes without ducts need a duct system first A ducted heat pump moves its heat through ducts, so a house without them needs a complete duct system before the heat pump can do anything. That is a design job, not an add-on. ### Where the ducts go In a single-story house with a usable attic, trunk lines and branches typically run overhead to ceiling registers. In a house on a raised foundation, the crawlspace can carry floor registers instead. Two-story pre-war houses are the hardest: second-floor rooms can be reached through closets, chases or a second air handler in the attic. ACCA Manual D sets the duct sizes from each room’s load. ### What the code asks of a new system Title 24 holds an entirely new duct system to a 5% leakage limit, with filtration, fan efficacy and airflow requirements. New duct in Sacramento’s climate zones is insulated to R-8, which SMUD’s rebate also requires. ### Why ductless is not the answer here Ductless mini splits avoid duct work but are a different trade, not offered through this site. The [ducted vs ductless guide](https://tulesacramentoheatpump.com/guide/ducted-vs-ductless-heat-pump/) sets the two side by side so you can decide which kind of contractor to call. Find out where the ducts can go An attic and crawlspace walk answers the first question in an older house: whether a ducted system can reach every room. ## Old ducts, asbestos and the furnace you already have ### Ducts added for a furnace Where ducts were added for a furnace and never for cooling, they are often too small for a heat pump. Title 24’s charge check on a heat pump assumes 300 cfm or more for every ton, and cooling a Sacramento summer takes more air than heating did. Testing tells you whether to resize, extend or replace. [Heat pump ductwork](https://tulesacramentoheatpump.com/heat-pump-ductwork/) covers each option. ### Asbestos Older ducts, duct tape, flue pipe and furnace parts can contain asbestos. Suspect material is tested before anyone disturbs it, and confirmed material goes to licensed abatement as a separate scope. Title 24 exempts asbestos-insulated ducts from the leakage test, which sometimes lets them stay sealed and abandoned in place. ### Retiring the gas equipment A floor or wall furnace is pulled out, its gas line capped and the hole in the floor or wall closed. For a ducted furnace, the [gas furnace to heat pump conversion](https://tulesacramentoheatpump.com/gas-furnace-to-heat-pump-conversion/) page explains the swap. ## Sizing for an older envelope Older houses carry more load per square foot than newer ones when the walls are uninsulated or the windows single-pane. A room-by-room [load calculation](https://tulesacramentoheatpump.com/guide/heat-pump-sizing/) at local design conditions is the only fair way to size them. The California Energy Commission’s data for downtown Sacramento puts the cooling design at 98 degrees at the 1% level and the heating design at 35 degrees at 0.2%. ### Fix the envelope first, or not If attic insulation is thin, adding it before sizing can shrink the heat pump and the ducts. The load calculation can be run both ways so you can see the difference before choosing. ## The panel and the electrical service Older houses often have smaller electrical services, and one that never carried central air adds a cooling load the panel has never seen. A heat pump usually draws about what a central AC would, and backup strips are where the extra load comes from, so strips are sized from the load, not from habit. ### When an upgrade comes up Panel work shows up constantly in City records: 719 permits issued from January 1 to October 25, 2026 describe a main panel or service upgrade. Going from 100 to 200 amps in the usual way costs roughly $1,500 to $4,500 around Sacramento, and a relocated panel, an underground service or meter work can take it past $5,000. The [electrical panel guide](https://tulesacramentoheatpump.com/guide/heat-pump-electrical-panel/) covers the load calculation. ## Permits, rebates and cost ### Permits The City’s standard heat pump change-out permit is written for a same-location replacement within 25% of the old unit’s size, with a separate option for new ducts. A house with no existing ducted system is a new installation rather than a change-out, so its permit is confirmed per project. The [Land Park and East Sacramento page](https://tulesacramentoheatpump.com/service-areas/land-park-east-sacramento/) covers the local details, and [Carmichael and Fair Oaks](https://tulesacramentoheatpump.com/service-areas/carmichael-fair-oaks/) covers County permits for older ranch houses. ### Rebates Retiring gas heat in SMUD territory can earn $3,000 with a variable-stage heat pump or $2,000 with a two-stage one rated 15.2 SEER2 or better. The equipment must qualify, the installer must belong to the SMUD Contractor Network, and new ducts need R-8 insulation. Rebate-qualified installs are available on request; the [SMUD rebate guide](https://tulesacramentoheatpump.com/guide/smud-heat-pump-rebates/) covers the rest, and the [cost estimator](https://tulesacramentoheatpump.com/tools/heat-pump-cost-estimator/) gives a first budget. ### Cost When the ducts are replaced along with a furnace-and-AC conversion, Sacramento-area projects typically run about $20,000 to $31,000 before rebates. No published local range covers building a first duct system in a house that never had one; that price comes from the duct design, the attic and crawlspace access, and any abatement. ## What's included - A walk of the attic, the crawlspace and the closets to find where ducts and an air handler can go - A room-by-room load calculation that reflects the walls, windows and insulation actually in the house - A duct design for a first system, or a leakage and airflow test where ducts exist - An electrical service and panel review, with any upgrade written into the scope - Flagging of suspect asbestos duct wrap or materials for testing and licensed abatement before work - A matched outdoor unit and air handler sized from the load, not from the old furnace - R-8 insulated ducts, sealed and tested to the Title 24 limit for the scope - Removal of the old floor or wall furnace or the old furnace and AC, with the gas branch capped - Patching of the openings left by the old equipment where the scope includes it - The building permit, inspection and ECC-Rater verification ## Where an older house usually starts | | Ducted furnace and central AC | Ducted furnace, no central AC | No ducts (floor or wall furnace) | | --- | --- | --- | --- | | What can be reused | Ducts, if they test well, and often the equipment locations | Duct routes, rarely the ducts as they are | Little beyond the gas line to cap | | Duct work | Seal, repair or replace after testing | Usually resized or replaced for cooling airflow | A complete new duct system | | Title 24 duct rule | 10% total or 7% to outside on altered ducts | Same, plus R-8 and testing on new runs | 5% leakage plus filtration and fan rules | | Permit path | Standard change-out | Change-out, often with the new-duct option | Scoped as a new system, confirmed per project | | Panel | Review; often enough for a heat pump with small strips | Review; a first cooling load is new to the panel | Review; the panel has never carried heating or cooling | | Check first | Duct leakage and static pressure | Duct sizes and the return | Attic and crawlspace room for ducts and an air handler | ## Related resources - Decision Guide [Should a Sacramento home get a ducted or a ductless heat pump?](https://tulesacramentoheatpump.com/guide/ducted-vs-ductless-heat-pump/)How the two systems get heat into each room, what the existing ducts decide, what SMUD's rebate-program data shows about cost, and where a ductless system is the better fit. - Learn [When does a heat pump need an electrical panel upgrade?](https://tulesacramentoheatpump.com/guide/heat-pump-electrical-panel/)What a heat pump adds to a home's electrical load, how a service-load calculation decides whether the panel can carry it, what an upgrade typically costs, and where SMUD's panel and circuit rebates fit. - Learn [How is a heat pump sized for a Sacramento home?](https://tulesacramentoheatpump.com/guide/heat-pump-sizing/)How a load calculation turns your house, your town's design temperatures and your ducts into a capacity, why the old condenser's tonnage is a poor guide, and what Title 24 and the City permit allow. - Learn [How does the SMUD heat pump rebate work?](https://tulesacramentoheatpump.com/guide/smud-heat-pump-rebates/)What SMUD pays on a ducted heat pump, which homes and systems qualify, the permit and Title 24 steps the claim depends on, the Go Electric panel and circuit add-ons, and who files the paperwork. - Learn [Where should a heat pump's outdoor unit go, and how do you keep it quiet?](https://tulesacramentoheatpump.com/guide/heat-pump-placement-noise/)How location affects airflow, drainage, service access and sound, what the City of Sacramento and Roseville permits allow when a unit moves, and the installation details that decide how loud a heat pump is. ## 1. Your house and your bills What you have now, what isn't working, your utility and what you want the new system to do. 2. Load, ducts and panel A room-by-room load calculation, a look at the ducts and returns, the electrical panel and where the outdoor unit can go. 3. Permit, set, braze, test Permit pulled, old equipment recovered and removed, new units set, lines brazed, pressure-tested and evacuated before charging. 4. Verified and explained Airflow, charge and backup heat checked, the ECC-Rater visit for Title 24, and the thermostat set up and walked through. ## What this work looks like New insulated flexible ducts on straps under the board sheathing of a 1930s Sacramento bungalow attic, a first duct system for the house Slim wall thermostat with a dark screen on the plaster hallway wall of a 1930s Sacramento bungalow, beside an arched doorway and a new return grille Plan a heat pump around the house you have Tell us roughly when the house was built, how it heats today and whether it has ducts. The plan starts with where air can travel. ## Older homes questions ### My house has a floor furnace and no ducts. Can it get a ducted heat pump? Yes, if there is a workable route for ducts. A first duct system usually runs through the attic, the crawlspace under a raised floor, or both, with the air handler in one of those spaces or a closet. Title 24 holds an entirely new duct system to 5% leakage plus filtration and fan rules. Ductless systems are a different trade and are not offered here. ### Will an uninsulated 1920s or 1930s house need a much bigger heat pump? It needs a load calculation, not a guess. Older walls, single-pane windows and open attics add load, and the calculation counts them room by room. In Sacramento the cooling side usually sets the size: the downtown design point is 98 degrees at the 1% level and 35 degrees at the 0.2% heating level. Adding attic insulation before sizing can bring the number down. ### Does an older house need a 200-amp panel before a heat pump goes in? Not automatically. A heat pump often draws about what a central AC did, and small backup strips keep the added load modest. A house with a 60- or 100-amp service, no open breaker spaces or a first-ever cooling load is where an upgrade comes up. A routine move from 100 to 200 amps costs roughly $1,500 to $4,500 around Sacramento. ### What if the old ducts or the furnace have asbestos on them? Suspect material is tested before anyone cuts or removes it, and confirmed asbestos is handled by a licensed abatement contractor under its own scope and price. Title 24 exempts asbestos-insulated ducts from the leakage test, so in some houses they can be left undisturbed and abandoned in place while new ducts are run beside them. ### Where does the outdoor unit go on a narrow older lot? Usually along a side yard or at the back, on a pad or bracket with the clearances the manufacturer requires. Narrow side yards, fences and neighbors' windows make placement and sound worth planning before the line set route is chosen. If the old AC condenser had a spot, reusing it keeps the permit simpler. ## Related services Heat pump ductwork Duct testing, sealing, resizing or full replacement so a heat pump gets the airflow it needs and passes the Title 24 test. Furnace to heat pump conversion One ducted heat pump in place of the gas furnace and the central AC, sized from a load calculation and tested to Title 24. Air handler replacement A new indoor fan and coil cabinet matched to the outdoor unit, with the drain, filter, backup heat and duct test done to Title 24.