HVAC Installation in Greater St. Louis

Replacing a typical home HVAC system does not have a single set price; Air Comfort Service, Inc. confirms the total after an in-home evaluation and written estimate. The biggest drivers are the size of the system your home needs and the type of equipment you choose. If repairs are frequent or a major component has failed, replacement often provides better long-term value than another repair. Our team regularly installs systems in the Festus area, so we account for local code and climate needs without surprises. We offer free estimates for new AC, furnace, and heat pump installations, and flexible financing options including 0% plans.

Expect your quote to reflect these specifics:

• System capacity (tonnage/BTU) based on a proper load calculation
• Equipment type and efficiency rating (single-stage, variable-speed, heat pump, etc.)
• Ductwork condition or modifications needed for airflow and sealing
• Installation complexity, access, and any code-required updates

Schedule a no-cost in-home estimate to get a firm, written price. <br/> Updated: 2026-04-08 <br/> Need help in Festus, MO? Call 3148148455 or book online.

The cost to install a new HVAC system with Air Comfort Service, Inc. is determined after a free in-home estimate because price depends on your home and the equipment you choose. The biggest drivers are system size and efficiency set by a load calculation, plus the scope of installation work. Our team installs systems across the St. Louis region, including projects in and around Wildwood. Right-sizing prevents overspending up front and avoids humidity and comfort issues later. If an older unit needs major parts, replacement often beats repeated repairs; otherwise, a focused repair may be reasonable.

When we price your project, we consider:

• Home factors that set capacity: square footage, insulation, windows, and layout
• Ductwork condition, sizing, and any modifications or sealing
• Fuel type and configuration: furnace with AC, heat pump, or ductless
• Accessories (air purifier, humidifier, UV), electrical needs, and permit/code items

Schedule a free estimate and we’ll provide itemized options so you can compare total installed prices accurately.

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Updated: 2026-02-13

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Need help in Wildwood, MO? Call 3148148455 or book online. "The installation went flawlessly." — Brian K.

HVAC installation with ductwork is priced case by case after an in‑home assessment because total cost depends on the system size, duct scope, and code requirements. The most common cost driver is how much ductwork must be added, replaced, or reconfigured and how accessible those areas are. Those costs vary by the scope of the work. One of our project managers will assess your unique home situation to determine your quote.

We routinely complete permit‑compliant installations across the St. Louis region, including work in Wildwood neighborhoods. One field reality: ducts hidden behind finished ceilings can add more labor than the equipment itself. We offer free estimates for new installations.

• Key cost factors to review on site:
• Full duct replacement vs. targeted modifications or sealing (e.g., Aeroseal)
• Equipment type and efficiency (AC, furnace, heat pump) and matched sizing
• Access constraints (attic/crawlspace), required permits/inspections, and old‑equipment removal Schedule an on‑site evaluation to receive a firm, itemized quote.

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Updated: 2026-02-13

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Need help in Wildwood, MO? Call 3148148455 or book online. "Fantastic job on installing new AC and Furnace Very professional And so appreciate the quick installation" — Cindy E.