Furnace Installation
Plan your heating system upgrade to stay warm and reduce winter energy costs.
A Heating System Built to Last
Is your furnace aging, inefficient, or no longer keeping up with Tennessee winters? Installing a new furnace is one of the smartest investments you can make for winter comfort and long-term home value. At Reliable Comfort Services, we help you navigate the entire process — from choosing the right-sized furnace and efficiency level, to professional installation, startup testing, and full training on your new system’s features and maintenance.
Our team has installed thousands of furnaces across Middle Tennessee, backed by 50+ years of combined experience. Tempstar is our primary install brand for split systems, including furnaces — a reliable platform backed by strong warranty coverage, available extended warranties, and No-Hassle replacement on select tiers. We also install Carrier and Trane, giving you reliable, manufacturer-backed options. We partner with Wells Fargo, TVA Financing, and Synchrony so upgrading to a modern, efficient furnace fits your budget. Our certified technicians understand Tennessee’s variable winters and help you select equipment built to handle our climate.
Why Choose Us
Our team has equipped Middle Tennessee homes with reliable furnaces, backed by 50+ years of combined HVAC experience. We understand how our region’s variable winters — mild spells followed by hard freezes — stress heating systems. When you install with us, you’re choosing a partner who stands behind your investment with warranty coverage, seasonal maintenance, and repair support for the full life of your system.
Tempstar is the furnace brand we install most, chosen for its reliable platform and strong warranty coverage, including available extended warranties and No-Hassle replacement on select tiers. We also install Carrier and Trane, and our technicians stay current on the latest furnace efficiency standards, combustion controls, and manufacturer installation protocols so your system is installed to exact specifications for peak efficiency through the coldest months.
Your new furnace can be backed by a manufacturer parts warranty of up to 10 years when the equipment is registered, an optional third-party labor warranty of up to 10 years, and No-Hassle equipment replacement on qualifying, select equipment if a major component such as the compressor or coil fails. We handle registration and explain exactly what’s covered.
A furnace that’s too small struggles on the coldest nights; one that’s oversized cycles frequently and wastes fuel. We calculate your home’s heating load using ASHRAE methods, accounting for insulation, air leakage, square footage, and Tennessee’s climate. The right size means consistent warmth and lower monthly heating bills.
We hold a Tennessee Mechanical (HVAC) and Refrigeration Contractor License, maintain full bonding, and carry a Better Business Bureau A- rating. Your furnace installation is backed by credentials that matter and a company with genuine accountability to our customers.
A new furnace installation is a significant investment, but financing shouldn’t delay your upgrade. We work with Wells Fargo, TVA Financing, and Synchrony to offer flexible payment plans. We discuss financing upfront so you can choose the system that makes sense for your home without financial stress.
Free, No-Obligation Estimate
Ready to explore a new furnace for your home? We’ll schedule a no-obligation assessment to evaluate your heating needs, walk you through equipment options, and provide a detailed estimate with no surprises.
Or explore related heating services:
Our Process
We begin by understanding your home’s unique heating needs. Our technician evaluates your home’s size, insulation quality, air sealing condition, window placement, and the layout of your living spaces. We calculate your heating load in BTU/hour using industry-standard ASHRAE methods to determine exactly how much warmth your furnace needs to deliver. This precision prevents the over-sizing that leads to wasted fuel and poor humidity control in winter.
Our assessment includes inspecting your current ductwork (if you have it), checking for air leaks that waste heat, and identifying cold spots or poorly heated zones. We also review your current heating bills and comfort concerns — this real-world feedback shapes our equipment recommendations. If your home needs improved cooling as well, we can discuss heat pump systems that provide both heating and air conditioning.
Once we understand your heating needs, we present furnace options with AFUE ratings, warranty terms, brand reliability, and lifetime operating costs. Higher-AFUE furnaces cost more upfront but save hundreds annually on heating fuel. We help you understand the payback period so you make an informed choice based on your long-term comfort and budget goals. Tempstar is our primary install brand, with Carrier and Trane also available, giving you real options and competitive pricing.
We also discuss advanced features: modulating burners that adjust output for better efficiency, variable-speed blowers that reduce energy use, and smart thermostats that learn your schedule and preferences. Financing through Wells Fargo, TVA Financing, or Synchrony makes high-efficiency upgrades more affordable than many homeowners expect.
Before installation day, we prepare your home to ensure a smooth process. This may include disconnecting the old furnace properly (following environmental regulations for any remaining refrigerant or materials), preparing the installation location, verifying that your home’s gas line has adequate capacity for the new furnace, and checking electrical service for proper support. If your home has a two-stage system or zoning, we confirm compatibility with new controls.
We also review the installation timeline, discuss ductwork modifications that might improve heating distribution, and confirm permit requirements. Our goal is to arrive on installation day fully prepared so nothing delays your new furnace startup.
On installation day, our certified technicians arrive fully equipped to complete the job right. We install the furnace to manufacturer specifications, ensuring proper gas line connections, electrical wiring to code, thermostat integration, and ductwork connections. We verify all safety controls, perform a complete combustion analysis, and test every safety shutoff and limit switch. This is precision work — our team communicates with you throughout so you understand each step.
Once the furnace is installed, we run a complete startup sequence: ignition, burner flame verification, airflow measurement through your ducts, temperature rise across the heat exchanger, thermostat accuracy testing, and safety shutdown testing. We document system performance and provide you with efficiency readings so you see proof of proper operation.
Before we leave, we walk you through your new furnace and thermostat operation. We show you how to adjust temperature settings, explain the thermostat’s programming features, and demonstrate seasonal maintenance you can do (filter changes, outdoor unit cleaning). We provide complete documentation: warranty details, service records, a homeowner manual, and our contact information for future service and maintenance questions.
We also recommend our annual furnace maintenance plan to keep your system running efficiently and catch any issues before they become problems. Prevention is always more affordable than emergency repair.
Protect Your New Furnace Investment
Once your new furnace is installed, staying on top of maintenance is the key to reliability and efficiency. We recommend annual furnace maintenance — ideally in fall before the heating season starts. A seasonal tune-up checks ignition, cleans the burner, tests safety controls, and verifies efficiency.
Our maintenance plans make staying on schedule easy — and they offer repair savings if issues ever do arise.
Getting more years out of your investment
Prevention of unexpected breakdowns during peak heating and cooling seasons
A clear, documented record of system condition that informs smart repair and replacement decisions
Improved system efficiency and lower monthly energy bills
Identify any conditions that could pose a hazard to your home or family
Measure how well your system is actually operating under current conditions
Honest, documented assessment of the current state of your equipment
Available to qualifying homeowners through the TVA program
Catch small problems before they become expensive repairs or emergency breakdowns
Financing Your New Furnace Installation
A new furnace installation is a significant investment, but financing options shouldn’t delay your upgrade. We work with Wells Fargo, TVA Financing, and Synchrony to offer flexible payment plans that fit a new heating system into your budget.
We discuss financing upfront so you can choose the system that makes sense for your home without financial stress.
Straightforward financing through Wells Fargo, with a simple online application.
Contact Us to ApplyAvailable through participating utilities — convenient payments made right on your utility bill.
Contact Us to Check EligibilityFlexible financing through Synchrony to fit quality equipment into your budget.
Contact Us to ApplyReal Savings for Tennessee Homeowners
As a TVA EnergyRight Quality Contractor Network Member, Reliable Comfort Services Inc. can help Middle Tennessee homeowners access real money back through the TVA EnergyRight rebate program. These rebates represent a genuine opportunity to offset the cost of upgrading your system — or maintaining what you have.
Rebates toward high-efficiency HVAC system replacements
Incentives for upgrades that boost overall system efficiency
Rebates for replacing aging or leaking ductwork
Available to qualifying homeowners on annual maintenance
Ask us how to take advantage of what’s available in your area when you schedule service.
Protection You Can Count On
We stand behind our work and the equipment we install. Every new residential install can add an optional labor warranty of up to 10 years through a third-party program, and our LG Pro Dealer status includes a 12-year parts warranty on LG ductless systems — among the strongest coverage available. That’s how confident we are in the quality of our work.
Parts and major components are covered up to 10 years when the equipment is registered. We handle registration and keep your documentation. Coverage varies by equipment.
Available as an option on any residential unit we install, through a third-party program. If selected, it covers repair labor for up to 10 years — you choose whether to add it.
Included on LG ductless installations through our LG Pro Dealer status — one of the strongest coverage packages available. Applies to LG ductless equipment only.
Available on qualifying, select equipment only — if a major component such as the compressor or coil fails within the coverage period, the unit is replaced rather than repaired.
Customer Reviews
We install furnaces throughout the broader Middle Tennessee region. Contact us to confirm installation availability in your area — we’re always glad to help a new neighbor stay warm.
Furnace Installation Service Areas
We install furnaces throughout Middle Tennessee for homeowners seeking reliable heating systems. From load calculations and equipment selection to professional startup, homeowners across the region count on us for installations that heat efficiently and last.
Answering Your Questions
Furnace sizing depends on your home’s square footage, insulation, air sealing, and climate. An undersized furnace won’t heat adequately; an oversized one wastes fuel. We calculate your heating load using industry methods to determine the exact capacity your home needs. Most homes in Middle Tennessee require 60,000–100,000 BTU furnaces, but we size yours specifically based on your home’s characteristics.
AFUE (Annual Fuel Utilization Efficiency) measures what percentage of fuel becomes usable heat. An 80% AFUE furnace uses 80 cents of every dollar for heat; a 95% AFUE furnace uses 95 cents. Upgrading to a high-efficiency furnace can noticeably lower your heating costs, though actual savings depend on your home, your usage, and local energy rates.
Most furnace installations take 6–10 hours depending on your home’s complexity, existing ductwork, and whether modifications are needed. We typically schedule a full day for installation and startup testing. We’ll give you a more precise timeline during your consultation.
Not always. If your current ductwork is properly sealed and sized for the new furnace’s airflow, you can keep it. However, leaky or undersized ducts reduce efficiency and heating performance. During our assessment, we evaluate your ducts and recommend upgrades if they’ll significantly improve comfort or efficiency.
Yes. We work with Wells Fargo, TVA Financing, and Synchrony to offer flexible financing terms. Monthly payments often fit within your current heating budget once you factor in fuel savings from a more efficient system. We discuss financing options upfront so upgrading is affordable.
Tempstar is our primary install brand for furnaces, and we also install Carrier and Trane — all reliable, manufacturer-backed equipment. We present options at different efficiency and price points so you can choose based on your budget and long-term goals, and we service all major brands. Tempstar furnaces come with strong warranty coverage, including available extended warranties and No-Hassle replacement on select tiers.
A new furnace can be backed by three layers of coverage. First, a manufacturer parts warranty of up to 10 years when the equipment is registered — we handle registration and keep your documentation, since coverage varies by equipment and many warranties require it. Second, an optional third-party labor warranty of up to 10 years, covering repair (labor) costs for up to a decade. Third, No-Hassle equipment replacement on qualifying, select equipment, which replaces the unit rather than repairing it if a major component such as the compressor or coil fails within the coverage period. We also offer service agreements that extend coverage beyond the manufacturer’s terms.
Yes, if you choose it. Beyond the manufacturer parts warranty of up to 10 years when the equipment is registered, we offer an optional third-party labor warranty of up to 10 years, covering repair (labor) costs for up to a decade. Select equipment also qualifies for No-Hassle equipment replacement on qualifying, select equipment if a major component such as the compressor or coil fails. Just ask and we’ll include the details with your estimate.
We recommend annual furnace maintenance — ideally in fall before the heating season starts. A seasonal tune-up checks ignition, cleans the burner, tests safety controls, and verifies efficiency. Many customers join our maintenance plan for automatic fall service and priority repair scheduling.
A new furnace with a modern air filter and properly sealed ductwork helps. We can also discuss adding an air cleaner, UV purifier, or humidifier to further improve indoor air quality during the dry Tennessee winters. These upgrades pair well with a new furnace installation.
Costs vary based on efficiency level, brand, and any ductwork modifications needed. A high-efficiency system costs more upfront than a standard model but can lower your operating costs over time. We provide a detailed written estimate before any work so you know the exact investment, and financing options are available.
Related Services
Pair your new furnace with complementary services for complete home comfort year-round.
If your current furnace fails, we diagnose and repair all brands and models for winter reliability.
Explore Furnace Repair & ServiceKeep your new furnace running efficiently with our annual seasonal maintenance plans and tune-ups.
Explore Furnace MaintenanceConsidering both heating and cooling in one system? Explore heat pump options for year-round comfort and efficiency.
Explore Heat Pump InstallationNeed summer cooling to complement your new furnace? Our air conditioning installation service provides modern, efficient cooling systems.
Explore Central AC InstallationImprove heating efficiency and air quality with advanced filtration, UV purification, and humidity control during Tennessee winters.
Explore Indoor Air Quality
Your Furnace Installation Experts
Upgrading to a new furnace is an investment in years of reliable winter comfort. Our team has been installing furnaces across Middle Tennessee, backed by 50+ years of combined experience. We perform precise load calculations, present equipment options that match your budget and efficiency goals, and install systems to manufacturer specifications. Every furnace we install is tested, documented, and backed by our commitment to your long-term heating success.
Our technicians are licensed, bonded, and factory-trained on the latest equipment and efficiency standards. We understand Tennessee’s variable winters and specify furnaces built to handle them. And we don’t stop at installation — we’re here for annual maintenance, seasonal tune-ups, and repairs whenever you need us.
Join our maintenance plan for annual furnace tune-ups or explore financing options.