Furnace Installation and Furnace Replacement Help
If your furnace is aging, expensive to repair, or struggling to keep your home comfortable, this page covers what to consider before installing or replacing a heating system, and how to get connected with a local licensed HVAC contractor.
- Furnace sizing should come from a heat-loss calculation
- High-efficiency models have specific venting needs
- Heat pump should be on the comparison list in many climates
- Confirm warranty on equipment and labor separately
Repair or Replace?
Five quick questions. The result is educational — a licensed contractor's evaluation is the real answer.
What affects new furnace cost
| Cost Factor | Why It Matters | Questions to Ask |
|---|---|---|
| Furnace type | Gas, electric, oil, and modulating units carry different equipment costs. | Which type fits my fuel source and climate? |
| Fuel source | Available fuel (natural gas, propane, electric) affects equipment choice and operating cost. | Will I need any fuel-line work? |
| Efficiency rating (AFUE) | Higher AFUE means more usable heat per dollar of fuel. | What AFUE tiers are you quoting? |
| System size | Right-sizing matters for comfort and lifespan. | Did you run a heat-loss calculation? |
| Ductwork condition | Leaks, undersized returns, or layout issues can hurt comfort and efficiency. | Will any duct work be done? |
| Venting requirements | High-efficiency furnaces vent differently and may require new flue runs. | What venting is required for the model you're quoting? |
| Thermostat and controls | Smart thermostats and zoning improve comfort and may require compatible equipment. | What controls come with the install? |
| Installation complexity | Attic, closet, basement, and tight mechanical rooms change labor time. | Will any platform, framing, or access work be needed? |
| Local code and permits | Permits, combustion air, and CO detection are commonly required. | Are permits and inspections included? |
| Add-ons and upgrades | Humidifiers, filtration, and zoning add capability and cost. | Which add-ons are recommended for my home? |
Actual installation costs vary by home, equipment, installation requirements, location, and contractor. HSRC does not set contractor pricing.
Furnace equipment options
| System Type | Best For | Key Considerations | Questions to Ask |
|---|---|---|---|
| Gas furnace | Homes with natural gas service. | Often the most cost-effective heat where gas is available. | Single-stage, two-stage, or modulating? |
| Electric furnace | Homes without gas service or in mild climates. | Lower install cost; higher operating cost in cold climates. | Would a heat pump be more efficient here? |
| High-efficiency furnace | Cold climates or homes with high heating bills. | Higher up-front cost; lower operating cost; specific venting requirements. | What AFUE tier do you recommend? |
| Dual-fuel system | Homes that want a heat pump's efficiency with gas backup for cold snaps. | More complex install; can optimize comfort and cost. | Is dual-fuel a fit for my climate? |
| Heat pump alternative | Homes that want to consolidate heating and cooling. | Replaces a furnace + AC pairing; performance varies by model and climate. | Should I compare a heat pump vs. a new furnace? |
Equipment recommendations depend on home, climate, fuel source, and budget. Ask your contractor to explain why a system fits your situation. Home Services Resource Center helps connect homeowners with independent local service providers. Availability, licensing, services, pricing, and response times may vary by location and provider.
What to have ready before requesting furnace help
- ZIP code and property address
- Approximate home size
- Current furnace age and fuel source, if known
- Whether the home has existing ductwork
- Recent comfort or repair issues
- Desired timeline
- Whether you are comparing repair vs. replacement
- Any efficiency or financing preferences
Questions to ask an HVAC contractor
- Are you licensed and insured to perform HVAC installation in my state?
- What system did you recommend and why?
- Did you run a load calculation for my home?
- What's included in the installation — equipment, labor, permits, thermostat, removal of the old system?
- What warranty applies to equipment and labor, and how long does it last?
- How do you handle ductwork issues that come up during installation?
- Is there a discount, financing, or seasonal promotion that applies?
- How will you protect my home during installation, and how long will the work take?
Helpful articles
- Gather your home details — square footage, system age, ductwork, recent issues.
- Decide whether you want quotes for repair, replacement, or both.
- Use the form to get connected with a local licensed HVAC contractor.
Frequently asked questions
Furnace type, fuel source, efficiency rating, sizing, ductwork condition, venting requirements, thermostat, installation complexity, permits, and local labor all play a role.
Frequent repairs, age (often 15+ years), rising energy bills, uneven heat, and a major upcoming repair are common signals. A contractor evaluation confirms it.
If both are aging and use the same air handler or share controls, replacing together can be more efficient and may simplify warranties. Compare options first.
Gas furnaces typically have higher up-front cost where gas is available, but lower operating cost in cold climates. Electric furnaces often cost less to install but more to run.
Ask about sizing methodology, efficiency tiers, venting, included thermostat, permits, warranty, and timeline.
Yes — use the form to share details, or call for help by phone.
Yes. You can call to be connected with a contractor directly.
No. HSRC helps connect homeowners with independent local licensed HVAC contractors. We do not perform installation work or set contractor pricing.
This guide is written to help homeowners understand common HVAC repair, installation, replacement, and quote considerations. It is educational and is not a substitute for an on-site evaluation by a licensed HVAC contractor. HSRC does not perform work directly, set contractor pricing, or guarantee availability — services and response times vary by location and provider.
A Clearer Way to Compare HVAC Installation Options
- • Learn what affects AC and furnace installation decisions
- • Understand repair vs. replacement considerations
- • Prepare better questions before speaking with a contractor
- • Use call or form options based on urgency
- • Get connected with local licensed HVAC contractors
Home Services Resource Center provides homeowner-friendly information and helps connect consumers with independent local service providers. HSRC does not perform HVAC work directly, set contractor pricing, or guarantee availability. Services, pricing, licensing, and response times may vary by location and provider.