Replacing a furnace is best done in the fall, before you need it. Gelid Tech installs gas and electric furnaces sized for your home, connected safely and tested before we leave.
When to Replace Your Furnace
- It is 15 to 20 years old or more
- It needs a repair every winter
- The heat exchanger is cracked
- Heating bills keep rising
- Rooms heat unevenly or the house never feels warm
Gas or Electric?
Gas furnaces heat quickly and cost less to run where natural gas is available. Electric furnaces and heat pumps suit homes without a gas line. We explain the options that fit your house and how much each costs to run.
Our Installation Process
- Measure the home. We size the furnace to your home’s heat loss instead of copying the old unit.
- Choose the system. We compare efficiency ratings and single-stage, two-stage or variable-speed blowers.
- Install. We remove the old furnace and connect gas, venting, wiring and ductwork.
- Test. We check gas pressure, combustion, venting and airflow, then walk you through the thermostat.
Paying for a New Furnace
Ask about HVAC financing to spread the cost of a new system.
After Installation
A yearly fall check through HVAC maintenance keeps your new furnace efficient and safe. Replacing your AC at the same time? Pair it with air conditioning installation so both systems share a matched blower and coil.
Understanding AFUE Efficiency Ratings
AFUE tells you how much of the fuel a gas furnace burns becomes heat inside your home. An 80% AFUE furnace turns 80 cents of every gas dollar into heat, and the rest goes out the flue. A 95% or higher furnace captures most of that lost heat with a second heat exchanger.
In a cold northern state, a high-efficiency furnace pays for itself quickly. In Mansfield, where the furnace runs far fewer hours each year, an 80% furnace is often the better value. High-efficiency furnaces also need PVC venting and a condensate drain, which can add installation cost in some homes. We’ll show you what each option would cost to buy and run in your house.
Single-Stage, Two-Stage and Variable-Speed Furnaces
- Single-stage: the burners are either fully on or off. Simple and affordable, but temperatures swing more between cycles.
- Two-stage: the furnace runs on a lower setting most of the time and switches to full power only on the coldest days. Heat is steadier and quieter.
- Variable-speed blower: the fan adjusts its speed to match demand. It improves comfort, filtration and how well your AC removes humidity in summer, since the same blower moves cooled air.
Why Furnace Sizing Matters
An oversized furnace heats the house in short bursts, turning on and off often. That wears parts faster, wastes fuel and leaves rooms uneven. An undersized furnace runs nonstop during a freeze and still can’t keep up. We size your furnace from a heat loss calculation based on your home’s square footage, insulation, windows and air leakage, not the size of the old unit.
Safety Checks on Every Installation
A furnace burns gas inside your home, so installation has to be done carefully. On every job we:
- Check gas line sizing and test all connections for leaks
- Verify the venting is the right size and material, properly sloped and sealed
- Check combustion and adjust gas pressure to the manufacturer’s specification
- Confirm the furnace has enough combustion air
- Test every safety control, including limit and pressure switches
- Confirm your carbon monoxide detectors are working
Matching Your Furnace and Air Conditioner
Your furnace’s blower moves the air for your AC in summer, so the two systems work as a team. If your air conditioner is also aging, replacing both at the same time lets us match the blower, coil and outdoor unit for the best efficiency and comfort. If your AC is newer, we’ll make sure the new furnace’s blower is compatible with it.
Signs Your Furnace Is Becoming Unsafe
Replacement is sometimes about safety, not just age or efficiency. Call us if you notice soot around the furnace, a yellow or flickering flame instead of a steady blue one, rust on the cabinet or vent pipe, or headaches and nausea at home that ease when you leave. If your carbon monoxide alarm sounds, leave the house and call 911.
Furnace Installation FAQ
How long does furnace installation take? Most replacements take one day.
Can I repair my furnace instead? If it is under 15 years old with one failed part, furnace repair usually makes more sense.
Should I replace my AC and furnace together? Not always, but if both are near the end of their life, replacing them together often costs less than two separate jobs.
Do I need a high-efficiency furnace in Texas? Not always. Because furnaces run fewer hours here, a standard 80% furnace is often the better value. We’ll compare the cost of both for your home.
What size furnace do I need? It depends on how much heat your home loses, not just its square footage. We measure before recommending a size.
When is the best time to replace a furnace? Early fall, before the first cold front, when you’re not waiting in the cold and scheduling is easier.
Will a new furnace lower my bills? Usually, yes, especially if the old furnace is 15 to 20 years old. A properly sized system with a variable-speed blower can also lower summer cooling costs.
Planning a new furnace? Call (682) 392-2998 or request a quote.