HVAC Quotes for AC, Furnace, and System Replacement
Comparing HVAC quotes is more useful when each quote covers the same scope. This page covers what a complete quote should include, what to watch for, and how to get connected with a local licensed HVAC contractor.
- Compare equipment tier first
- Confirm what's NOT included
- Ask about labor warranty separately
- Permits and inspections should be in the price
What affects new AC cost
| Cost Factor | Why It Matters | Questions to Ask |
|---|---|---|
| Home size and layout | Square footage, ceiling height, sun exposure, and floor plan affect required cooling capacity. | What size system does my home need? How did you size it? |
| System type | Central AC, heat pump, ductless mini-split, and packaged systems carry different equipment and labor costs. | Which system types make sense for my home and why? |
| Equipment capacity | An undersized system struggles; an oversized one short-cycles and wastes energy. | Did you run a load calculation (Manual J or similar)? |
| Efficiency rating (SEER2) | Higher-efficiency equipment usually costs more up front but can lower operating costs. | What efficiency tiers are you quoting and what's the payback? |
| Ductwork condition | Leaky, undersized, or missing ducts often need repair, sealing, or replacement. | Did you inspect my ductwork? Are repairs included? |
| Electrical requirements | New systems may need a different breaker, disconnect, or whip — sometimes a panel upgrade. | Will any electrical work be needed? |
| Thermostat and controls | Smart thermostats, zoning, and communicating controls add capability and cost. | What thermostat is included? Is it compatible with the system? |
| Installation complexity | Attic, crawlspace, rooftop, and tight access locations all change labor time. | Where will the equipment be installed and how complex is the access? |
| Permits and code requirements | Most jurisdictions require permits and inspections for HVAC replacements. | Are permits and inspections included in the price? |
| Add-ons and upgrades | Air purification, humidifiers, zoning, and surge protection add capability and cost. | What's optional vs. required, and what does each add-on actually do? |
| Local labor and availability | Contractor pricing varies by market, season, and demand. | Is this seasonal pricing, and what's the warranty on labor? |
Actual installation costs vary by home, equipment, installation requirements, location, and contractor. HSRC does not set contractor pricing.
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.
What to have ready before requesting AC help
- ZIP code and property address
- Approximate home size (square footage and number of stories)
- Current system age, if known
- Whether the home has existing ductwork
- Whether the current system is working
- Rooms that are too hot or uncomfortable
- Recent repair history
- Desired timeline
- Whether you are comparing repair vs. replacement
- Any brand, efficiency, or financing preferences
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?
What an HVAC quote should include
- • Contractor name and license info
- • Service type and project scope
- • Equipment details (make, model, capacity, efficiency)
- • Labor scope
- • Parts and materials
- • Ductwork assumptions
- • Electrical assumptions
- • Permits where applicable
- • Warranty terms (equipment and labor)
- • Project timeline
- • Payment terms (where applicable)
- • Exclusions
- • Quote expiration date (where applicable)
AC quote vs. furnace quote vs. full-system quote
May include outdoor condenser, indoor coil or air handler, thermostat, refrigerant line set, and ductwork assumptions.
May include equipment type, fuel source, venting, efficiency tier, blower compatibility, and thermostat.
Combines AC, furnace, coil, thermostat, ductwork changes, and equipment-compatibility considerations into a single project.
Quote red flags to watch for
Most contractors are straightforward, but a few patterns are worth a second look:
- • Vague scope or single line-item total
- • No equipment make / model / capacity listed
- • No discussion of how sizing was determined
- • Pressure to decide immediately
- • Missing warranty information
- • Unclear exclusions
- • No discussion of ductwork or compatibility
- • Refusal to answer basic questions
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
Use the form to share details about your home and timeline. HSRC helps you get connected with a local licensed HVAC contractor who can review your situation and provide a written quote.
Home size and layout, system type, equipment capacity, efficiency rating, ductwork condition, electrical needs, thermostat or controls, installation complexity, permits, add-ons, and local labor availability all affect the final price.
Age, repair frequency, comfort issues, and the cost of the next major repair all factor in. The interactive decision tool on this page can help you think it through. A licensed HVAC contractor can confirm in person.
Proper sizing depends on square footage, layout, insulation, sun exposure, and climate. A reputable contractor runs a load calculation (often called Manual J) instead of guessing.
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.
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.