Furnace is 15–20+ years old
Furnaces last 15–20 years with proper maintenance. Past that, you’re rolling dice on the heat exchanger — and a cracked exchanger is always a replacement, never a repair.
Furnace Installation
Furnace Installation in Sumter, SC
A new furnace installation is about more than replacing equipment. Proper sizing, professional installation, and careful system setup all play a major role in how efficiently your new furnace performs for years to come.
Our licensed technicians evaluate your home’s heating needs, recommend the right system, and install it according to manufacturer specifications so you can enjoy reliable comfort and lower energy costs.
Gas, Electric & Dual-Fuel
See how we approach every install →
Sized right. Installed right. Documented before we leave.
Studies estimate that up to 30% of a heating system’s efficiency depends on installation quality, not just the equipment itself. Sizing, gas pressure, venting, ductwork condition, combustion verification, and a start-up report with documented readings. Cut corners on any of these and you’re paying premium for mid-tier performance.
As a Tempstar® Elite Dealer, we install gas, electric, and dual-fuel furnaces across the full product range — from the entry-level Performance Series to the Ion™ variable-speed systems that run at near-silent efficiency. We hold the SC State Mechanical License for gas piping and venting work, and every install includes duct inspection, post-install combustion analysis, and warranty registration.
Signs It's Time
Six reasons homeowners decide to replace their furnace.
Some are emergency decisions. Some are smart ones made before the emergency.
Repair bills keep adding up
Once you’re spending more than a third of a new system’s cost on repairs in a year or two, replacement usually pays for itself in 3–5 winters.
Uneven heat or comfort complaints
Cold bedrooms with a too-hot living room usually means the system was sized or zoned wrong from day one. A new install corrects that.
High gas bills
An 80% AFUE furnace from the ’90s wastes a fifth of every dollar of gas. A modern 96% unit closes that gap significantly.
Yellow flame or combustion issues
A healthy flame is steady blue. Yellow or flickering means incomplete combustion — and a furnace that old with that symptom is usually a replacement candidate.
Furnace short-cycles
Short-cycling almost always traces back to an oversized original install. A right-sized replacement fixes the comfort and the compressor wear at once.
Recognize any of these? Free estimates — let’s see what a right-sized replacement actually costs.
Our Process
From first call to fired-up — five steps
Same process on every furnace install, whether it's a straight swap or a full system upgrade with the AC.
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Free site assessment
We come out, see the home, check existing ductwork and venting — no charge, no obligation.
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Manual J heat-loss calc
Heat loss calculated for your actual home — not guessed from square footage. Equipment selected to match the load.
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Written options
Good / better / best in writing — AFUE tiers, total install cost, financing terms, our recommendation.
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One-day install
Most furnace replacements wrap in one day. We protect floors and walls, haul the old unit, and leave spotless.
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Commissioned and registered
Gas pressure tuned, combustion verified, airflow documented, manufacturer warranty registered for you.
Why homeowners pick Advance for furnace installation
Proper sizing. Licensed installation. Trusted equipment.
- Tempstar® Elite Dealer — Performance Series through Ion™ variable-speed
- Manual J heat-loss calculation on every quote — never sized by shortcut
- SC State Mechanical License for gas piping and venting
- Duct inspection and repair included with every system install
- Post-install combustion analysis and CO verification
- Financing available — soft pre-qualification in minutes
What to expect on pricing
Itemized quotes. Honest ranges. No hidden line items.
- Entry-tier 80% AFUE gas furnace — typically $4,500–$6,000 installed
- Mid-efficiency 90–95% AFUE — typically $6,000–$7,500 installed
- Premium 96–98.5% AFUE variable-speed — typically $7,500–$9,500+ installed
- Gas line and venting changes quoted separately when needed
- Old equipment haul-away included in every quote
- Financing available: low monthly payments, soft pre-qual
Frequently Asked
Furnace installation questions, answered straight.
Does a new furnace come with a warranty?
Yes. New furnaces include manufacturer warranty coverage, and we also stand behind our workmanship. We’ll explain your warranty options before installation and register eligible equipment after the job is complete.
How much does furnace installation cost?
Most full furnace installations in our area land between $4,500 and $9,000, fully installed. Entry-tier 80% AFUE units run on the lower end; mid-efficiency 90–95% on the middle; premium 96–98.5% AFUE on the upper range. Every quote is itemized and in writing, with financing options included.
How do you size a furnace?
The right answer is a Manual J heat-loss calculation — we measure square footage, ceiling heights, window count and orientation, insulation level, and air-leakage estimates for your actual home. Sizing by square footage alone produces oversized systems that short-cycle and wear out early.
How long does furnace installation take?
A straight furnace replacement is usually a one-day job — typically 6–8 hours from arrival to clean-up. If we’re replacing the AC at the same time, plan on two days. Gas line or venting changes add time and are quoted separately.
What is AFUE and does it matter?
AFUE (Annual Fuel Utilization Efficiency) is the percentage of your gas dollar that becomes actual heat in your house. An 80% AFUE furnace wastes 20 cents of every dollar of gas; a 96% unit wastes about 4 cents. In our climate, the math on a 96% unit usually pays back the premium within 4–7 years through lower gas bills.
Do you handle gas line and venting on the install?
Yes. We hold the SC State Mechanical License required for gas piping work, and we handle venting for atmospheric, power-vent, and direct-vent (PVC) furnace configurations. Most installs don’t require gas line changes — but when they do, it’s one contractor, not two.
What about the old furnace — do you haul it away?
Yes. Old equipment haul-away is included in the install quote. We disconnect, pull the old furnace, install the new one, and leave the utility room cleaner than we found it.
Financing & Payment Options
Flexible Financing for Repairs, Replacements & New Systems
HVAC investments shouldn't put your comfort on hold. We work with qualifying customers to spread the cost of repairs, replacements, and indoor air quality upgrades into manageable monthly payments.
A new high-efficiency furnace without the up-front sticker shock. Every furnace installation qualifies for financing. Soft pre-qualification in minutes — no impact on your credit to check options.
Subject to credit approval. Financing options, terms, and qualifications may vary by lender and project type. Not all applicants will qualify. Our team can walk you through available options when you request service or an estimate.
Warm when it counts
Right-sized furnace, installed right.
Manual J sizing, one-day installs, combustion verified before we leave. Tempstar® Elite Dealer. Free estimates, financing available.