Most furnaces last 15 to 20 years. Rising bills, repeated repair calls, and strange noises are signs it may be time to talk installation instead of another fix. Patriot is a licensed heating contractor that installs properly sized heating systems for homeowners and businesses throughout Fenton, MO.
Every furnace installation starts with a free in-home estimate. A technician sizes the system to the house, checks the venting and ductwork, and gives you a written price before anything is ordered.
When You Need Heating System Installation
The following signs typically point to installation being the better investment:
- Your energy bills keep climbing even though your habits haven't changed
- The furnace cycles on and off more than it used to
- You're calling for repair more than once a season
- Rooms farther from the furnace never quite feel warm
- The unit is 15 years or older and parts are getting hard to find
Age isn't the whole story. An 18-year-old furnace limping along calls for a different conversation than a 6-year-old furnace with one bad part. A good technician checks the simple things first. If a filter change or a low-cost part solves the problem, that's the answer, not a sales pitch for a new system.
Our Furnace Installation Process
- In-home assessment. We inspect your ductwork, insulation, window placement, and electrical panel.
- Load calculation. We use Manual J calculations based on your home's square footage, insulation, ceiling height, and window layout to size the equipment correctly. This matters most in older Fenton homes near the Meramec River, where small closets, low crawl spaces, and duct runs built for older equipment can create clearance or airflow issues if sizing is guessed instead of calculated.
- Written proposal. We provide an itemized quote covering equipment, labor, wiring, and permit fees.
- Permits. We file the required mechanical permit with St. Louis County before work begins.
- Old unit removal. We disconnect and remove your existing furnace, with refrigerant recovery when required.
- Installation. We install code-compliant venting, electrical tie-in, and gas line connections with leak testing.
- Startup and testing. We run a full ignition test, check temperature rise, and verify carbon monoxide and static pressure readings.
- Walkthrough. We cover thermostat programming, filter location, and warranty registration before we leave.
Most standard installations wrap up in one day.
Furnace installation Cost
The cost of a furnace install depends on the scope of the job. Replacing an existing furnace with sound ductwork costs less than converting fuel sources or adding a heat pump to a home without existing infrastructure. Other factors include the AFUE efficiency rating you choose, any ductwork modifications, and electrical or gas line work needed for the new equipment. We provide a written, itemized estimate before work begins so you can see exactly what's included.
Licensing and Permits
St. Louis County requires a mechanical permit and a licensed mechanical contractor for any furnace installation, since Missouri has no statewide HVAC licensing law. Our work is performed under Master License ML12523 and Mechanical Contractor License MSM02530, both verifiable through St. Louis County records (opens in a new tab). An unlicensed installation can void manufacturer warranties and create liability during a home sale inspection.
Why Homeowners and Businesses Choose Us
Co-owner Craig Denton has led local HVAC teams for over 35 years, and that experience shapes every installation we do in Fenton, MO.
- Technicians train hands-on at our in-house facility before working on your property
- We use load calculations on every job instead of guessing based on square footage
- Upfront, itemized pricing, no hidden fees
- 24-hour response, including weekend emergency service
- Every employee passes a background check and drug screening
Sizing and Placement Challenges in Older Homes
Many homes near the Meramec River in Fenton were built decades ago. They may have small closets and low crawl spaces. Their duct runs may not handle a modern furnace or heat pump. Install a bigger unit without checking the space first. You could face clearance problems for years.
It's important to get the size right. An oversized furnace heats a room fast and then shuts off. That short cycling leaves cold spots elsewhere. An undersized unit may run nonstop and still fall behind on a cold January morning. We use a load calculation for every heating system installation. We don't guess based on square footage.
- Additions or finished basements that changed the home's total heated square footage
- Insulation levels in homes with original single-pane windows
- Duct runs that were resized or rerouted during past remodels
- Ceiling height and closet depth for the new equipment
- Return air placement that may be lacking in homes built before code updates
Ready for a heating system that's sized right and installed correctly? Patriot Heating, Cooling and Air Quality installs heating systems throughout Fenton, MO. Schedule your installation today