The Old Towne Orange Historic District has been on the National Register since 1997. It covers about a square mile centred on the Plaza fountain, with roughly 1,400 buildings in dozens of styles: Victorians, Craftsman bungalows, hip-roof cottages, Spanish Revival and more. Most date from between the 1880s and 1940. People who buy here love the houses, and then find that the houses were built for a world of gas lamps, ice boxes and open windows.
Getting heating and cooling right in Old Towne is a sequence, and the electrical work sits at the front of it. We handle it as one project, because we are licensed for both halves.
We open the panel, check the service size, and look for the tell-tale signs of older wiring: porcelain knobs and tubes in the attic, cloth-covered cable, fuses, and circuits that have been extended by previous owners. None of it is unusual here. We note it and move on to planning.
A heat pump or AC always gets a new, dedicated circuit and an outdoor disconnect, never a tap off the old wiring. If the service has room, that is the whole electrical job. If it is small, we upgrade it, usually to 200 amps, or add a subpanel. Sometimes the smartest move is a smaller inverter system that sits comfortably on what is there.
Plaster walls, tall ceilings, and attics that range from generous to non-existent. In many bungalows a ductless heat pump is the gentlest option, giving heating and cooling room by room. Where the attic or crawlspace allows, a compact ducted system can serve the whole house. Old floor furnaces and wall heaters can stay as backup or be retired.
Replacing the remaining knob-and-tube circuits, adding grounded outlets, an EV charger for your Orange home, surge protection. We lay it out in phases so you can do the essential pieces now and the rest later without redoing anything.
Joseph Eichler's only Orange County homes are here, a few hundred of them built between 1960 and 1964. They are post-and-beam, walled in glass, with low roofs and little or no attic, and they were heated by copper tubing cast into the concrete slab. Six decades on, many of those radiant systems leak or have been abandoned. The glass that makes the houses beautiful also makes them gain heat quickly on a September afternoon and lose it quickly on a January night. Ductless heat pumps suit them well, and we size for the glazing, not just the square footage.
Around the university, many older houses are rented to students, often with a converted garage or a back unit. Equipment ranges from original wall heaters to window units to hand-me-down split systems. For owners the priorities are speed, clear communication and fixes that stay fixed between tenants.
Single-storey homes from the fifties through the seventies with ducts in the attic, often added or modified over the years. These are the houses where a single undersized return and leaky ductwork cost more comfort than the equipment does. Duct sealing and an added return often outperform a bigger condenser.
Two-storey homes on the hills toward Santiago Canyon, mostly from the 1970s onward. They run hotter than the flats in summer, take the full force of Santa Ana winds in autumn, and see ash in bad fire years. Coil cleaning matters, and upstairs comfort is usually solved with zoning or a duct correction rather than more tonnage.
Large semi-rural lots with horse trails, barns and guest houses, split between the city and unincorporated county land. Outbuildings mean subpanels and long feeder runs, and larger homes often run two systems or more.
Orange is far enough inland that winter mornings get genuinely cold, especially in the canyon neighbourhoods, and the heat that sat idle all summer gets switched on in a hurry. Most of the no-heat calls we see here fall into a handful of patterns, and they differ by house type.
Old Towne floor and wall furnaces. Gravity floor furnaces and wall heaters are still in service in the district. They need their venting, burners and gas connections checked, and when they are past saving, a ductless heat pump replaces them with even heat in every room.
Attic and closet furnaces in the tracts. Igniters crack, flame sensors foul, inducer motors wear, and condensate traps on high-efficiency furnaces clog. All are routine repairs. On older furnaces we inspect the heat exchanger every time; a crack means carbon monoxide can reach the living space, so we shut that furnace down and show you the evidence.
Heat pumps. A heat pump heats and cools with one outdoor unit, and in Orange it has plenty of capacity for winter. On the coldest mornings, frost on the coil triggers a short defrost cycle, which is normal. If cool air comes from the vents during defrost, a heat strip kit fixes it.
More: furnace repair · heat pump installation · 24-hour emergency calls.
What Orange homeowners typically pay for the work we do most. Your figure comes from a free written estimate after we have seen the house; no phone quotes.
| Work | Typical Cost | In Orange |
|---|---|---|
| Diagnostic / service call | $89 – $150 | Put toward the repair |
| Furnace igniter or flame sensor | $200 – $450 | Tract furnaces on the first cold night |
| Ductless mini-split, single zone | $3,500 – $5,500 | Converted garages and back units near Chapman |
| Multi-zone mini-split (3 heads) | $9,000 – $15,000 | Eichlers and Old Towne bungalows |
| Duct sealing | $600 – $1,800 | Patched-together ducts in post-war tracts |
| Added return air duct | $650 – $1,800 | El Modena single-return homes |
| Two-zone retrofit | $2,800 – $5,200 | Hot upstairs in Serrano Heights |
| Furnace replacement | $4,200 – $7,800 | 96% AFUE where venting allows |
| Heat pump system (ducted) | $9,000 – $16,000 | Tract homes retiring gas heat |
| Dedicated HVAC circuit | $450 – $1,200 | Keeps new equipment off old wiring |
| Subpanel | $1,500 – $3,500 | Barns in Orange Park Acres, back units |
| Panel upgrade to 200A | $3,000 – $6,500 | Fuse boxes and small services in Old Towne |
| Level 2 EV charger installed | $900 – $2,500 | Detached garages add run length |
Rewiring is quoted per house after an inspection. 0% APR financing on approved credit; credit card, check, Zelle and cash accepted. We handle heating, cooling, ventilation and electrical. We do not service water heaters or tankless water heaters of any brand.
In the City of Orange, replacing heating or cooling equipment needs a mechanical permit and inspection, and service upgrades, subpanels, rewiring and new circuits need an electrical permit. Title 24 testing applies to qualifying HVAC work. We pull every permit under our own licence.
Old Towne adds a layer: the city applies design standards to changes visible from the street, which can affect where a condenser, a disconnect or a new service mast goes. The unincorporated parts of Orange Park Acres are permitted by the County of Orange instead. We sort out which rules apply at the estimate so the install is not held up.
Having the C-20 heating and air conditioning classification and the C-10 electrical classification on one licence means an Old Towne project does not stall between trades. One company quotes the panel, the circuits and the equipment, and one crew finishes it.
Check that licence yourself: CSLB #1108650 at cslb.ca.gov lists both classifications, the bond and workers' compensation.
Yes. The usual answer is a ductless heat pump, which heats and cools without cutting duct runs through original plaster or lath. Small refrigerant lines pass through the wall, indoor heads go where you need them, and the outdoor unit sits somewhere out of sight from the street. Where a bungalow has a usable attic or crawlspace, a compact ducted system is sometimes possible too. Because Old Towne has design standards for visible exterior changes, we plan placement up front and help you prepare what the city asks for, before anything is ordered.
We make a plan. Knob-and-tube is not automatically dangerous where it is untouched and intact, but it was never meant to carry modern loads, it has no ground, and it should not be buried in insulation or extended. For a new heat pump or AC, the equipment gets its own new circuit from the panel, so it never relies on the old wiring. From there we can replace the remaining circuits room by room or all at once, depending on budget and how long you plan to stay. It is permitted work under our C-10 licence.
The copper tubing in the slab of the Orange Eichlers is now about sixty years old, and leaks are common. Repairing tubing inside a slab is specialised hydronic work that we do not do. What we do is give you a new heat source that does not depend on it. Most Eichler owners choose ductless heat pumps, because the houses have little or no attic and walls of glass. The heads heat in winter, cool in summer, and install without tearing into the post-and-beam structure. We size carefully for all that glass.
We will tell you after a load calculation, which takes minutes once the panel is open. Plenty of Orange homes already have room. Where the panel is at its limit, the next step is ours to take: a subpanel, a service upgrade to 200 amps, a load-managed charger, or an inverter heat pump sized to what you have. In Old Towne we often combine the service upgrade with the first phase of rewiring so the walls are only opened once. See our Orange EV charger page for charger specifics.
Tell us how you want it run and we will run it that way. Many owners have us call the tenant directly to arrange access, then send the owner the diagnosis, photos and a written price before any repair beyond the service call. Rentals in the older blocks around the university often have a converted garage or a back unit with its own wall heater or window unit, and a small ductless heat pump is usually the durable fix. We answer around the clock for no-heat calls.
Common causes are a dirty flame sensor, a clogged filter tripping the high-limit switch, a blocked condensate drain on a high-efficiency furnace, or a furnace that is simply oversized for the house. We check each one with a meter and a look rather than a guess. On furnaces twenty-plus years old we also inspect the heat exchanger, since a crack can leak carbon monoxide. If we find one, we show it to you and shut the furnace down, and we can quote a replacement or a heat pump the same day.
The City of Orange requires a mechanical permit and inspection for replacing a furnace, condenser or heat pump, and an electrical permit for service upgrades, subpanels, rewiring and new circuits. California Title 24 adds testing on qualifying HVAC jobs. In Old Towne, exterior work visible from the street can also need design review. Parts of Orange Park Acres are unincorporated, in which case the County of Orange is the permitting agency. We confirm which applies and pull the permits under our own licence.
Ductless equipment in the historic and mid-century homes, conventional split systems everywhere else. We service Mitsubishi Electric · Daikin · Lennox · Trane · Carrier · Bryant · American Standard · Rheem · Goodman · Amana · York · Bosch · all brands.
Related: home rewiring · panel upgrades · subpanels · EV chargers in Orange · indoor air quality · light commercial. Nearby: Villa Park · Santa Ana · Tustin · Anaheim.