Professional furnace installation
Keep your home warm and your energy bills low with properly sized, clean furnace installations by licensed Marietta technicians.
- Proper load calculation & sizing
- Clean, certified gas & electrical hookup
- Same-day emergency replacements available
Furnace types, sizing, and professional installation
Choose the right heating system for your home. We calculate precise heating loads, install top-efficiency equipment, and back every setup with local safety certifications across Cobb County.
Furnace types & system options
Compare gas, electric, and hybrid dual-fuel systems tailored for Georgia climates.
Natural Gas Furnaces
Rapid, high-heat output designed for cold Georgia winter snaps. Available in single-stage, two-stage, and modulating variable-speed configurations.
Key Advantages: Lowest ongoing heating cost, rapid warmth delivery, long service lifespan.
Ideal Application: Homes in Marietta and Cobb County with existing gas line connections.
Fuel & Power Requirement: Natural Gas or Propane (LP conversion)
Installed by certified technicians
Marietta HVAC Pros standard compliance
How we calculate the right furnace size for your home
An oversized furnace cycles on and off rapidly, creating hot spots and wearing out components. An undersized unit runs nonstop on frosty mornings without keeping you warm.
We perform an ACCA-approved Manual J calculation for your specific Marietta floorplan to determine exact BTU and CFM airflow requirements.
- Total conditioned square footage & ceiling volume
- Attic and wall insulation R-values
- Window orientation, shading, and solar heat gain
- Ductwork static pressure and layout integrity
| Home Area | Gas Furnace | Heat Pump |
|---|---|---|
| 1,200 – 1,600 sq ft | 40,000 – 60,000 BTU | 2.0 – 2.5 Tons |
| 1,600 – 2,400 sq ft | 60,000 – 80,000 BTU | 2.5 – 3.5 Tons |
| 2,400 – 3,200 sq ft | 80,000 – 100,000 BTU | 3.5 – 4.5 Tons |
| 3,200+ sq ft | 100,000+ BTU (or Dual Systems) | 5.0+ Tons (Zoned) |
What happens on installation day
We complete most residential furnace replacements in a single day with zero mess left behind.
Manual J load calculation
We measure your home's square footage, ceiling heights, insulation ratings, and window exposures to calculate the precise heating BTU requirement.
Duct & venting inspection
Our technicians inspect return air plenums, supply static pressure, and flue venting to prevent backdrafts and ensure smooth airflow distribution.
Precision system mounting
We secure the furnace cabinet with vibration-dampening pads, level gas lines, wire safety shut-offs, and seal supply plenums with mastic.
Combustion & safety commissioning
We test gas manifold pressure, flame sensor currents, carbon monoxide emissions, and calibrate your thermostat for safe, reliable winter heating.
Lowering winter utility bills without sacrificing comfort
Modern condensing furnaces operate far more efficiently than units installed a decade ago. Here is how modern efficiency features translate into real savings.
AFUE ratings explained
Annual Fuel Utilization Efficiency measures how effectively a furnace converts fuel into heat. An 80% AFUE unit wastes 20 cents of every fuel dollar through the flue, while a 96% condensing unit only loses 4 cents.
Single-stage vs. modulating burners
Standard single-stage furnaces run at 100% capacity whenever they cycle on. Modulating gas valves adjust output incrementally in tiny steps, maintaining an exact indoor temperature while using less gas.
Variable-speed ECM blower motors
Electronically commutated blower motors use up to 75% less electricity than standard PSC motors, delivering constant whisper-quiet air circulation throughout all rooms.
Local utility rebates & tax credits
High-efficiency systems (95%+ AFUE) qualify for federal Energy Star tax credits up to $600 along with local electric and gas utility rebates in Georgia.
Ready for a warm, energy-smart winter?
Get an accurate heating estimate with honest sizing and clear pricing from Marietta HVAC Pros.
Frequently asked questions about furnace installation
Clear answers on furnace types, proper unit sizing, install day timelines, and heating bill savings.
Gas & electric models
Single-stage, two-stage, and modulating systems matched to your floor plan.
Manual J load sizing
Exact heat loss calculations to prevent short-cycling and cold spots.
One-day installation
Complete removal, hookup, testing, and cleanup completed in 4 to 8 hours.
Up to 98% AFUE efficiency
Noticeable drops in monthly fuel costs with modern condensing heat exchangers.
Need a replacement quote?
Get an on-site evaluation for your home in Marietta or Cobb County. We measure your heating requirements and present straightforward system options.
Our installation pledge
- Licensed & insured Georgia HVAC technicians
- Drop cloth protection & post-job cleanup
- Manufacturer warranty registration assistance
Schedule your furnace installation
Get an accurate estimate and quick scheduling across Cobb County. Our local technicians inspect your space, recommend the right unit size, and ensure reliable heat for your home.
High-Efficiency Heating
Modern furnace systems engineered to keep your home warm while reducing monthly energy bills.
Licensed & Certified Pros
Certified local technicians ensuring code compliance, safe gas line checks, and manufacturer warranty coverage.
Prompt Local Scheduling
Quick site assessments and flexible installation timelines across Marietta and Cobb County.
Need urgent assistance?
Speak directly with an HVAC advisor