There is no single price. Cost depends on the furnace size, efficiency rating, brand, venting and gas line work, ductwork condition, how hard the install is and permit fees. We look at your home first, then give you a clear written price before any work begins.

Size is based on a load calculation, not square footage alone. We account for insulation, windows, ceiling height, air leakage and ducts. An oversized furnace short cycles and heats unevenly, and an undersized one cannot keep up on cold nights.

Quotes differ by equipment tier, furnace size and what is included, such as venting, gas connection, thermostat, duct changes, a new filter cabinet and permits. Compare quotes line by line, and ask whether each one includes a load calculation and a full safety test.

Utilities and manufacturers sometimes offer rebates on qualifying high-efficiency equipment, but programs and amounts change often. Tell us you are interested and we will point you to what applies to your system and address.

AFUE shows how much of the gas you burn becomes heat for your home. A higher rating costs more up front but wastes less fuel, which can lower winter bills. Because Southern California winters are mild, we help you weigh the payback for your home before you choose.

Single-stage furnaces run at full power and cycle on and off. Two-stage furnaces have a low and a high setting, and variable-speed models adjust continuously for steadier temperatures, quieter operation and more even heat. They cost more, so the right pick depends on your budget and comfort goals.

An 80% furnace vents hot exhaust through a metal flue. A 90%+ condensing furnace pulls out more heat, so it vents through PVC pipe and needs a condensate drain. The condensing model uses less gas but costs more and may need venting changes.

A heat pump heats and cools with electricity, so one system covers both seasons. A dual-fuel setup pairs a heat pump with a gas furnace for the coldest nights. If you already have a gas line and ducts, a new gas furnace is often the simpler choice.

Many furnace replacements are finished in a single day. Changing the venting, moving the furnace, adding ductwork or installing a package unit can take longer. We give you the expected timeline in your quote.

Not always. We inspect your ducts for leaks, damage and sizing, and we check the flue or PVC vent and gas line. Leaky or undersized ducts waste heat and can limit a new furnace, so we may recommend sealing or repairs. We tell you what is needed and why before work begins.

Usually in the same spot as the old one, such as a closet, garage, attic or crawlspace, as long as it has the clearance, combustion air and venting a gas furnace requires. If the location does not meet code, we explain the options before we start.

Replacing both gives you matched equipment, one coordinated install and a single warranty path. If your AC is also older or often needs repairs, doing both together can save a second visit. If the AC is fairly new, replacing only the furnace and checking the coil is usually fine.

In most cases, yes. A permit is generally required to replace a gas furnace, and the work is inspected for gas, venting and electrical safety. We handle permitting and inspections where required so your furnace is installed to code.

We do not recommend it. A furnace involves a gas line, combustion venting, electrical wiring and exact airflow and safety settings. Mistakes can cause gas leaks, carbon monoxide or a fire, and can void the warranty, so use a licensed contractor.

Manufacturers typically cover parts for several years, and the heat exchanger often carries longer coverage, though terms vary by brand and many require registration after installation. Labor coverage is separate. We explain the equipment warranty and our labor terms in your written quote.

Yes. California requires carbon monoxide alarms in homes with fuel-burning appliances such as a gas furnace. We test the furnace and venting for safe operation, and we can tell you where alarms should go.