Replacing your furnace for the first time? The process is more straightforward than most people expect — especially when you buy factory-direct and avoid the traditional contractor markup. Here's a complete timeline so you know exactly what's coming, from the moment you start shopping to the first night your new furnace runs.
The Complete Furnace Replacement Timeline
Day 1–3: Research & Sizing
Before you call anyone, figure out what size furnace you need. This is more important than brand or features. An undersized furnace won't keep your home warm; an oversized one short-cycles and wears out faster. Use our BTU Calculator to get a baseline estimate based on your square footage, insulation, and climate zone.
Key measurements you'll need: home square footage, ceiling height, number of windows, insulation quality, and your Minnesota climate zone. Twin Cities homes typically need 40–50 BTU per square foot as a starting point.
Day 2–4: Get Your Quote
With traditional HVAC contractors, this step involves waiting for a tech to visit, measure, and send a quote that arrives 3–7 days later. With Furnace Direct's factory-direct model, you can get pricing immediately by calling (888) 762-1334 or using our online tools. We carry full Goodman product lines with same-day delivery in the Minneapolis metro.
Day 3–7: Order & Delivery
Once you've selected your furnace (and AC if doing a combo install), your equipment ships. Furnace Direct offers same-day delivery for most Minneapolis-St. Paul metro orders. You'll receive the furnace, all required components, and documentation including the warranty registration information.
What gets delivered: The furnace unit, filter rack (if applicable), flue components, installation manual, and warranty paperwork. Inspect everything on delivery — note any shipping damage before the driver leaves.
Installation Day (4–8 Hours)
A qualified HVAC installer typically takes 4–8 hours for a standard furnace swap. Here's the breakdown:
- Hour 1: Shut down old system, drain lines if applicable, disconnect gas/electrical/flue
- Hours 1–2: Remove old furnace from utility room or closet
- Hours 2–5: Position and connect new furnace — gas line, electrical, flue venting, return air, supply plenum
- Hour 5–6: Test all connections, check for gas leaks, verify flue draft
- Hour 6–7: Start-up and commissioning — verify ignition sequence, test all stages, check temperature rise
- Hour 7–8: Walk-through with homeowner — thermostat settings, filter location, warranty registration
What to Do on Installation Day
Clear a path from your front door to the utility area — furnaces are large and heavy. Make sure your thermostat is accessible. Have pets in a separate room. The crew will need access to your electrical panel to lock out the circuit. Keep children away from the work area.
Day of Installation: After the Crew Leaves
Your new furnace is running. Here's what to do in the first 24–48 hours:
- Set your thermostat 2–3 degrees above room temperature and let it run through a full cycle
- Check all vents in your home are open and unobstructed
- Note any unusual smells (a slight burning smell from new components is normal for 1–2 cycles)
- Register your warranty within 60 days — Goodman requires registration to activate the extended warranty
Week 1: Break-In Period
New furnaces sometimes have a "break-in" period where you might notice a slight smell. This is normal and dissipates within a few heating cycles as manufacturing oils burn off. If you smell gas at any point, immediately turn off the furnace, leave the house, and call your gas utility.
30 Days After: First Filter Check
Check your air filter 30 days after installation. New ductwork or disturbed dust can clog a new filter faster than normal. After that initial check, standard 1" filters typically need replacement every 60–90 days; 4" media filters last 6–12 months.
Annual: Schedule Maintenance
High-efficiency furnaces (90%+ AFUE) require annual maintenance to maintain warranty validity and peak performance. Schedule a tune-up each fall before heating season. Most issues — igniter wear, draft inducer problems — are inexpensive to fix early and expensive if they cause a breakdown mid-January.
Fast-Track Option: Same-Day Installation
If your furnace fails in the middle of a Minnesota winter, you don't have 7 days to shop around. Furnace Direct's same-day delivery model means you can have a new Goodman furnace on your doorstep the same day you order. Pair that with an installer who can respond quickly, and you can have heat back within 24 hours of your old furnace failing.
How long does furnace installation actually take?
A straightforward furnace swap in an existing home takes 4–8 hours for a qualified installer. More complex jobs — new construction, adding AC, relocating the furnace, or upgrading ductwork — can take 1–2 days. The furnace itself is typically running within 6–7 hours of the crew arriving.
Do I need to be home during furnace installation?
Yes, you should be home for at least the start and end of the installation. The installer will need access to your electrical panel and thermostat, and you'll want to be present for the walk-through to understand filter access, shut-off locations, and thermostat operation. You can be in another part of the house during the middle hours of work.
When is the worst time to replace a furnace in Minnesota?
January and February are the busiest months for emergency replacements — and the most expensive. If your furnace is aging (15+ years), consider a planned replacement in late summer or early fall. You'll have more scheduling flexibility, better pricing, and won't be in the cold while you wait. Furnace Direct offers same-day delivery year-round.
What happens to my old furnace?
Your installer will typically haul away and dispose of your old furnace. Confirm this when scheduling — some contractors charge extra for removal. Old furnaces cannot simply be left at the curb; they contain refrigerants and must be properly disposed of. Most HVAC companies recycle the metal.
🔥 Ready to Get Started?
Same-day delivery in the Minneapolis metro. Factory-direct pricing — no contractor markup.
📞 Call (888) 762-1334 📍 Check Your AreaGet wholesale pricing on a new system.
Tell us a little about your home and what you're replacing. We'll send real numbers on a Goodman 96% AFUE setup — shipped direct to your door anywhere in the lower 48. No contractor markup, no obligation.