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Find Furnace / forced air heating system install or replace pros in Decatur

Avatar for Tri-Star Home Repair Heating and Air
Tri-Star Home Repair Heating and Air
5.0(
16
)

Serving Decatur, TN and surrounding areas

Approved

In business since 2023

Free estimates

Small jobs welcome

"Scott was dependable to show up each day until the job was finished. He did excellent work. We've had numerous compliments from our neighbors that everything looks great."
Photos
Photos
Photos
Photos
Response time5 hrs
5 neighbors recently requested a quote
Recommended by25%of homeowners
Avatar for Honest A/C, LLC
Honest A/C, LLC
5.0(
17
)

Serving Decatur, TN and surrounding areas

Approved

In business since 2009

Free estimates

Emergency services offered

"Anthony and Kaitlyn were amazing! They both went over and beyond helping me with my warranty co. Witch I had been dealing with for 4 mouths. They got things done. Not only did they help with the warranty co they went over all my options, cost and time frames. Worked around my schedule. Showed and explained to me in detail what was wrong with my 2 units. Showed up for appointments. What a blessing! I cant even begin to tell you how how much I appreciated all the extra effort. Both Anthony and Kaitlyn (put in hrs.) dealing with my warranty co. And that no joke! I would highly recommend Honest AC to everyone and they are extremely knowledgeable, honest and affordable. They make it real clear in all that they do! THERE CUSTOMERS MATTER. Unlike my warranty co. LOL Honest ac will have me as a customer for life! Wish you the best success to you both. Thank you! thank you! Anthony and Kaitlyn for your help I needed it."
Minisplit Installation
Head #1
Minisplit Installation
Mini-split Installation
Outdoor Unit

+6

Response time6 hrs
Response rate96%
Recommended by86%of homeowners
Avatar for 9-Line HVAC & Electric, LLC
9-Line HVAC & Electric, LLC
5.0(
9
)

Serving Decatur, TN and surrounding areas

Approved

In business since 2024

Emergency services offered

Warranties offered

"They were fantastic all around, if I could give 10 stars for their service I would. Unbelievably clear and concise communication, always on time, and great pricing."
Response time6 hrs
3 neighbors recently requested a quote
Recommended by71%of homeowners
Avatar for Shield Mechanical LLC
Shield Mechanical LLC
5.0(
5
)

Serving Decatur, TN and surrounding areas

Approved

In business since 2025

Free estimates

Emergency services offered

\nShield Mechanical is a family-owned and operated HVAC contractor offering a true one-stop shop for all your heating and cooling needs. From reliable service and repairs to complete system replacements, new installations, and full new-construction HVAC projects, we deliver quality workmanship you can depend on. At Shield Mechanical, we’re committed to solutions that keep your business or home running at its best — because our mission is simple: Protect Your Comfort.\n\n

Split system replacement
Split system replacement
Split system replacement
Split system replacement
New Duct System

+23

4 neighbors recently requested a quote
Avatar for Jim's Plumbing Service
Jim's Plumbing Service
4.6(
28
)

Serving Decatur, TN and surrounding areas

Approved

Super Service Award Winner

In business since 1992

Emergency services offered

Warranties offered

"Jim arrived on time and ready to work. He worked hard without taking breaks. Worked on cleaning out the main sewer drain to septic system. Identified potential line collapse."
Response time12 hrs
Response rate93%
9 neighbors recently requested a quote
D & B Heating and Cooling
4.6(
19
)

Serving Decatur, TN and surrounding areas

In business since 2003

Free estimates

Credit card accepted

"D & B Heating and Cooling went *above and beyond* to help me with my (lack of) air conditioning. My A/C unit went out on a Friday evening. I had reached out to several other companies with repair service requests, but my situation wasn't considered an emergency. Out of desperation and frustration, after several days and a 100-degree July 4th holiday with no A/C, I reached out again for help via this site. D&B responded within 3 hours. They were at my house from 8:00pm thru 9:30pm (yes, in the evening as it got dark) diagnosing and trying to fix the problem, and were back at my house at 8:30am the next morning for the final repairs. My A/C unit had been been hit with lightning. D&B successfully did their best to 'unstick' and refurbish the slightly welded parts, rather than installing new parts or recommending a brand new unit, which of course saved me a lot of expense. I was extremely impressed with D&B's responsiveness and commitment to superb customer service. They are great guys doing honest work. I highly recommend them and will absolutely call them for any future services needed."
Response time1 day
Recommended by100%of homeowners
Avatar for Covenant Air LLC
Covenant Air LLC
4.7(
27
)

Serving Decatur, TN and surrounding areas

In business since 2010

Credit card accepted

"David is great! He did an excellent job installing our home Radon mitigation system. He worked with us to determine the most effective and efficient way to set up our mitigation system. The system works great! Our Radon levels were very close to 0 after the initial install and almost a year later they are still very close to 0, currently measuring at 0.8. He was very professional and responsive throughout the entire installation process. We would highly recommend Covenant Air for help with decreasing the Radon levels in your home.
"
Closet
Fan Placement
another view
Recommended by88%of homeowners
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FAQs for furnace / forced air heating system install or replace projects in Decatur, TN

Converting from an oil furnace to an electric furnace isn't a simple swap—the oil system needs to be completely removed before installing the electric furnace. You'll need a full electric system installation, but you might be able to reuse existing ductwork if it's up to current safety standards. You’ll need to budget for a new electric furnace installation, which costs between $1,800 and $6,200, including professional removal, proper disposal, and safe installation of the new system.

Electric furnaces are 100% efficient at converting electricity into heat. However, some of that heat can be lost as it travels through your home's ductwork or escapes through poorly insulated areas. That's why regular duct maintenance and proper home insulation are important to maximize your furnace's efficiency and reduce heat loss, ensuring consistent warmth and lower energy costs.

With proper maintenance, an electric furnace can last anywhere from 20 to 30 years, outlasting the average gas furnace's lifespan of 15 to 20 years. To keep your electric furnace running efficiently, schedule regular cleanings, tighten connections, and have inspections done before winter arrives. With routine maintenance, you’ll ensure consistent, safe heating for years to come.

The size of the electric furnace you need depends on factors like your home's square footage, climate, and insulation quality. As a general guideline, those who live in warmer climates should multiply their square footage by 30 to 35 BTUs, while those in cooler areas should multiply it by 50 to 60 BTUs.

Consulting with an HVAC professional can help you determine the exact size that's right for your home.

An electric furnace works by converting electricity into heat using high-resistance heating elements. A blower then pushes the warm air through your home's ductwork, distributing heat evenly throughout your space. Since there's no combustion involved, electric furnaces eliminate the risks associated with gas furnaces and provide consistent, reliable heating when properly installed.

An electric furnace uses between 40 and 80 kilowatts per day to heat your home. The exact amount it uses depends on factors like your home's size, insulation, and overall energy requirements. Larger homes or those with poor insulation use more energy than smaller, well-insulated spaces. A professional furnace assessment can help confirm the ideal unit size for your needs.

The Decatur, TN homeowners’ guide to furnace / forced air heating system installs or replaces

From average costs to expert advice, get all the answers you need to get your job done.