You don’t think much about the furnace—until that first cold snap hits Broken Arrow and the house won’t warm up. As a technician of Tellez Heat & Air. I install, replace, and tune furnaces across Broken Arrow, Tulsa, Bixby, Jenks, Owasso, and Coweta. This is the real-world guide I give my neighbors when they ask, “What should I know before replacing my furnace?”
Below is a clear roadmap—what to decide, what to expect on install day, how to avoid common mistakes, and how to keep bills down all winter. No fluff. Just the stuff that matters.
1) The 10-Minute Warmup: What You Need to Decide First
Your house + your winters = your furnace plan. Start with these four decisions:
- Fuel type (Gas or Electric?)
- Gas (most common here): warmer supply air, lower winter operating cost, needs gas line + venting.
- Electric: simpler installation, higher operating cost unless you pair it with a heat pump.
- Efficiency (AFUE rating)
- 80% AFUE: budget-friendly, standard flue venting.
- 95–98% AFUE (condensing): higher upfront, lower bills; uses PVC venting.
- Staging & Blower
- Single-stage: on/off; fine for smaller homes.
- Two-stage: quieter, steadier temps, better for comfort.
- Modulating: premium comfort, micro-adjusts output.
- ECM (variable-speed) blower: smooth airflow, better humidity control, lower electrical use.
- Timing
- Replace before peak cold if your unit is 12–20 years old, noisy, or unreliable. Winter is unforgiving here; proactive beats emergency.
Decision checkpoint: If you’re unsure, that’s normal. During my in-home visit I run a load calc, check ducts, and show you 2–3 options with plain-English pros/cons.
2) The Broken Arrow Reality Check: Why Sizing & Ducts Matter
Our winters can bounce from mild days to freezing nights with wind that cuts. Two things determine whether you’re warm and efficient:
Correct sizing (Manual J calculation).
Bigger isn’t better. Oversized furnaces short-cycle (on/off constantly), waste energy, create hot/cold swings, and wear themselves out. Undersized ones run forever and never catch up. I measure square footage, windows, insulation, and infiltration to get sizing right.
Ductwork condition.
Even a perfect furnace can’t push air through leaky, crushed, or undersized ducts. I check static pressure, supply/return balance, and look for leaks or kinks. A small duct fix can deliver a big comfort upgrade.
3) Your Install Day, Step by Step (No Surprises)
Here’s how a professional install should go — this is our standard:
- Arrival & protection. Drop cloths, shoe covers, and a quick walkthrough of the plan.
- Safe shutdown & removal. Power, gas, and old unit removed safely.
- Duct transitions. Custom fittings so airflow isn’t choked.
- Vent & drain (if high-efficiency). Proper PVC routing, slope, and condensate drain.
- Gas line & electrical. Code-compliant connections and shutoffs.
- Coil & thermostat pairing (if shared with AC/heat pump). We match components so everything talks and runs efficiently.
- Commissioning. We measure temperature rise, static pressure, verify combustion (for gas), set blower speeds, and calibrate the thermostat.
- Owner hand-off. I show you filter size/location, thermostat features, and the maintenance schedule—then I leave the place clean.
Pro tip: Ask your installer to show you the temp rise and static pressure readings. If they can’t, the job isn’t done.
4) Straight Talk on Cost (What We Typically See Locally)
Every home is different, but here are typical installed ranges I see across Broken Arrow jobs (equipment + standard install). Your final price depends on sizing, duct fixes, venting, and accessories:
- Standard 80% gas furnace: $3,800–$5,500
- High-efficiency 95–98% gas furnace: $5,500–$8,500
- Add-ons (as needed):
- Minor duct modifications: $300–$1,200
- New PVC venting (high-eff): $300–$800
- Smart thermostat: $150–$350
- Whole-home humidifier: $600–$1,200
I’ll price your options clearly and tell you when the higher-efficiency model actually makes financial sense for your usage—not just because it’s “fancy.”
5) Comfort Menu: Options That Truly Matter (and those that don’t)
Worth it for most Broken Arrow homes:
- Two-stage or modulating furnace + ECM blower → fewer drafts, quieter, steadier rooms.
- High-efficiency (95%+) → great if you’re staying long-term or gas prices rise.
- Smart thermostat → better schedules, energy reports, remote control.
- Whole-home humidifier → Oklahoma winters can get dry; humidity improves comfort at lower temps.
Nice-to-have depending on the home:
- Media filter cabinet (4–5″ filters) → better filtration, fewer changes.
- Air cleaner/UV → if allergies/IAQ are a concern.
Usually not worth the extra cost:
- Oversized equipment “just in case.” Comfort suffers, bills go up.
6) Avoid These 6 Common Furnace Mistakes
- No load calculation. Guessing at size is the #1 reason new systems disappoint.
- Ignoring ducts. You can’t fix airflow with new equipment alone.
- Skipping commissioning. If nobody measures temp rise/pressure, you’re the test dummy.
- Reusing undersized flue/vents. Especially unsafe with high-eff changes.
- Wrong thermostat pairing. A single-stage stat on a two-stage furnace wastes the upgrade.
- No maintenance plan. Filters + tune-ups prevent 80% of issues I’m called to fix mid-winter.
7) After the Install: How to Keep Bills Down & Heat Up
- Filter changes: Standard 1″ filters every 1–2 months in winter; media filters every 4–6 months.
- Set realistic temps: 68–70°F occupied / 62–65°F overnight can trim bills without losing comfort—especially with a humidifier.
- Seal & insulate: Attic insulation and air sealing help your new furnace work less and last longer. (We handle blow-in insulation if you want a one-team solution.)
- Annual tune-up: Pre-winter inspection catches weak igniters, dirty sensors, and draft issues before they strand you in January.
8) Quick Scenarios (How I’d Advise a Neighbor)
- “My furnace is 17 years old and loud.”
I’d price a two-stage 95% with ECM blower, check ducts, and show you the payback vs. a budget 80%. We’ll talk comfort first, bills second. - “The bedrooms are cold, living room is hot.”
We’ll fix duct balance and static pressure. Then a variable-speed furnace will smooth airflow. Equipment + duct tweaks, not equipment alone. - “We might move in 3–5 years.”
Consider a quality 80–92% with two-stage/ECM. Comfort now, reasonable cost, and still attractive to buyers.
9) Your Homeowner Prep Checklist (Save This)
- Replace or note current filter size.
- Clear a path to the furnace and thermostat.
- Decide: gas vs electric, efficiency, and staging priority (comfort vs upfront).
- Make a list of rooms that run hot/cold—tell me; I’ll measure those runs.
- Ask about rebates/financing and maintenance plans.
10) How We Work at Tellez Heat & Air (What to Expect from Us)
- Local & family-owned. You’re talking to the technician who’ll be in your home.
- We measure, not guess. Load calc, duct diagnostics, and full commissioning—every time.
- Clear options. I’ll show you 2–3 right-fit choices with honest pros/cons and pricing.
- Clean, code-compliant installs. Venting, gas, electrical, and permits done right.
- Follow-through. Post-install check, filter reminders, and a maintenance plan that’s sensible—not pushy.
Ready to get your home winter-ready?
Call (918) 809-2017 or request a free in-home consultation. We’ll build the right furnace plan for your Broken Arrow home—comfort you can feel, savings you can see.
FAQs (Fast Answers You’ll Actually Use)
How long does a furnace install take?
Most replacements are one day. Duct fixes or high-eff venting can add a few hours.
Repair or replace?
If your furnace is 10–12+ years and needs a major repair (heat exchanger, control board), replacement often makes more sense.
Do I need a new thermostat?
If you upgrade to two-stage/modulating, a compatible thermostat unlocks the comfort you’re paying for—worth it.
What size furnace do I need?
We size it with a Manual J load calculation. Square footage alone isn’t reliable.
Will a high-efficiency furnace really lower my bill?
In many Broken Arrow homes—yes. Especially with variable-speed blowers, sealed ducts, and proper setup.