Furnace replacement: scope, costs, and what to ask

What replacement should address

Request the reasons for replacing the existing furnace and the condition of equipment that will remain. Ask for the new heating capacity, airflow plan, venting requirements, controls, and relationship to any retained cooling coil. A replacement proposal should explain design changes rather than simply repeat the capacity printed on the old equipment.

Understand the system being assessed

A furnace heats air that is distributed through the home. Fuel type, controls, airflow, and the condition of the equipment are useful context for a heating assessment.

Carrier — Furnace not turning on · Source checked 2026-09-06

Useful details to gather before the visit

You do not need to diagnose the equipment. Record the observations you can make without opening panels or accessing unsafe areas.

• What fuel does the furnace use, if known?
• Does it produce no airflow, cold airflow, or heat that stops quickly?
• Is there a visible error code or a carbon monoxide alarm?

Have the model, approximate age, prior service findings, and warranty documents ready if available. Describe recent changes to the home and your goal for the visit.

Compare the whole replacement project

List every component being replaced and every component retained. Ask why the proposed scope addresses the original problem, what site work it requires, and which warranties apply. When repair remains an option, get a separate repair assessment so you can compare timing, out-of-pocket cost, and remaining uncertainty.

What affects the price for this project?

Request separate prices for the furnace, venting changes, fuel or electrical connections, duct transitions, thermostat, removal, permits, and testing. If cooling equipment is also proposed, have it listed separately so you can understand why it is part of the project.

Temperaly does not set provider prices. Ask for the charge for the proposed scope and a written explanation of exclusions. A useful quote separates required work from optional improvements so you can compare offers for the same result.

An example of a question worth resolving

A furnace fan runs but the rooms stay cold. Describe that pattern and the thermostat mode. It does not by itself establish whether the problem is a setting, the heating equipment, or another control.

Use the example to frame your questions, not to diagnose your home. Ask the provider what evidence supports their recommendation and how they will verify the result.

Choose your next step

Review the scope, price, timing, and warranty before authorizing work. Start a furnace replacement request with your service city and state and what you need help with. A request does not reserve an appointment.

For a broader equipment decision, read repair versus replacement. For a current loss of comfort, see AC not cooling or no heat.