This Mehlville MO furnace guide covers the established south St. Louis County community along I-55 and Lemay Ferry Road — post-war ranches, split-levels, and basement furnaces — and how to buy a name-brand furnace factory-direct.
Who we are
Furnace Direct sells name-brand HVAC equipment factory-direct and coordinates turn-key installation with vetted, licensed partners across the St. Louis hub (roughly a 70-mile radius). You see transparent equipment pricing first, then we help line up the install labor.
Mehlville is inside our St. Louis turn-key install hub. Furnace Direct, a DBA of Hamlin Mechanical LLC, sells furnaces factory-direct and coordinates turn-key installation with locally licensed partners. For nearby guides, see the Affton MO furnace installation cost guide, the Lemay MO furnace installation cost guide, and the St. Louis MO furnace guide.
Buy the same name-brand furnace the pros install — shipped factory-direct to your door. No middleman, 5-star rated, and financing available.
What we sell
For Mehlville homes we supply name-brand heating equipment and matched cooling:
- Gas furnaces in 80% and 96%+ AFUE tiers
- Goodman single-stage, two-stage, and variable-speed options
- Matched AC condensers when cooling is in scope
- Heat pumps for dual-fuel or all-electric paths
We do not publish invented installed prices. Call for Pricing: (888) 762-1334.
Why you need it
Mehlville is an unincorporated part of south St. Louis County that grew quickly after World War II. The housing stock is dominated by brick ranches, split-levels, and two-story homes from the 1950s through the 1980s, most with basements and a gas furnace. Many of these homes are on their second or third furnace, often connected to original ductwork that was never resized when central air was added.
South County winters bring hard freezes and occasional snow and ice, while summers are hot and humid. Because the furnace blower also moves air for the AC, a furnace replacement is a good time to check return air, filter access, and whether the AC coil is matched. Older homes may still vent through a masonry chimney, which matters if you move to a high-efficiency furnace.
Check that your basement furnace has adequate combustion air and a clean return path — finished basements sometimes box in the old equipment too tightly. If your water heater shares the chimney with an 80% furnace, moving to a 96%+ furnace may leave the water heater alone in an oversized flue, which your installer needs to address. Many Mehlville homes also have a single return in the hallway; adding or enlarging returns during the replacement can help a new furnace deliver its rated airflow and keep bedrooms more even in both winter and summer.
Who to buy from
Choose an installer who checks venting and the chimney liner, confirms gas line and electrical readiness, and sizes the furnace from a heat-loss calculation rather than the old label. Buy the equipment factory-direct from Furnace Direct, then compare installers on:
- 80% AFUE (chimney venting) versus 96%+ AFUE (PVC venting and condensate drain)
- Chimney liner condition if you stay with an 80% furnace
- Duct and return-air condition in an older ranch or split-level
- Coil matching with your existing or new AC
- St. Louis County permit and inspection requirements — confirm with your installer; we do not invent fee amounts
Factory-direct equipment from Furnace Direct keeps the biggest line item transparent, so the comparison comes down to labor quality and scope.
When to buy
Late summer and early fall are ideal in Mehlville, before heating season demand. If your furnace is 15–20+ years old, has been flagged for a cracked heat exchanger, or needs repeated repairs, replace it before the first cold snap. Call for Pricing Mon–Fri 7am–6pm CT, Sat 9am–3pm CT.
How to buy
- Browse gas furnaces and note your fuel type, home age, and current venting.
- Call (888) 762-1334 for factory-direct pricing.
- Schedule St. Louis-hub turn-key install with a licensed partner.
- Finish inspection, startup, and warranty registration.
To get an accurate Mehlville quote on the first call, have these ready:
- Photos of your current furnace and its data plate (model and serial number)
- Approximate square footage, number of stories, and any additions or finished spaces
- Where the indoor equipment sits (basement, attic, closet, garage, or crawlspace)
- Your fuel type (natural gas, propane, or electric)
- Any comfort problems in your Mehlville home — hot or cold rooms, humidity, noise
Factory-direct pricing keeps the equipment line item honest. Licensed local install partners handle permits, recovery or gas connections, and startup. Always Call for Pricing at (888) 762-1334 rather than trusting generic internet cost widgets — scope and home conditions change the number.
Frequently Asked Questions
Is Mehlville covered for turn-key install?
Yes — through our St. Louis hub, including Oakville and the rest of south County.
Can I keep my chimney with a new furnace?
With an 80% furnace, often yes if the liner is sound. A 96%+ furnace vents through PVC instead. Your installer should inspect it.
Should I replace the AC at the same time?
If it is the same age, matching them usually improves efficiency and airflow. We can quote both.
What does a Mehlville furnace cost?
It depends on efficiency, venting, and ductwork. Call for Pricing at (888) 762-1334.
Bottom line for Mehlville: the right system is the one sized for your home, matched indoor-to-outdoor, and installed by a licensed local partner who knows St. Louis-area homes. Furnace Direct keeps the equipment side transparent with factory-direct pricing, so you can focus your comparison on install quality, warranty registration, and long-term reliability. Call (888) 762-1334 to talk through your options.
Get your system replaced.
Tell us a little about your home and what you're replacing. A specialist will call you to work out exactly what you need, go over the price, and get it replaced. No obligation.