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

Avatar for Carney & Son 72 Degrees
Carney & Son 72 Degrees
4.6(
79
)

Serving Johns Island, SC and surrounding areas

Approved

In business since 1983

Free estimates

Emergency services offered

"Great bunch of guys! Came out in the rain and installed furnace / ac unit right before the weather turned cold Very professional and courteous. Left the work area neat and clean. I am glad they were able to get out as fast as they did."
Carney & Son 72 Degrees
Carney & Son 72 Degrees
Carney & Son 72 Degrees
Before Duct Cleaning
After Duct Cleaning

+11

Response time7 hrs
10 neighbors recently requested a quote
Recommended by89%of homeowners
Avatar for Quality Pro Services
Quality Pro Services
5.0(
21
)

Serving Johns Island, SC and surrounding areas

Approved

In business since 2025

Free estimates

Emergency services offered

"The HVAC technician who came out for my central air cleaner replacement did an outstanding job. He showed up on time, explained everything clearly, and made the whole process quick and stress-free. You could tell he really knew his stuff… He also took the time to answer my questions and even gave a few helpful tips to keep the system running smoothly. It’s hard to find reliable, honest service like that these days. He didn’t try to sell me the most expensive product but the one he said was best fit for my needs. Highly recommend if you want the job done right the first time!"
Tech Kyle
Tech Phil
HVAC Maintenance
HVAC Maintenance
Carrier Unit

+13

18 neighbors recently requested a quote
Avatar for Preferred Home Services, LLC
Preferred Home Services, LLC
3.8(
48
)

Serving Johns Island, SC and surrounding areas

Approved

In business since 2014

Free estimates

Emergency services offered

"The Technicians were punctual, professional, and courteous. Installed 4 ton 16 sear Lennox split unit AC with gas furnace in one day, and did a great job."
Generator
Generator & HVAC Maintenance
233 neighbors recently requested a quote
Recommended by54%of homeowners
Avatar for Freeman Repair And Remodeling LLC
Freeman Repair And Remodeling LLC
4.5(
72
)

Serving Johns Island, SC and surrounding areas

Approved

In business since 2006

Free estimates

Emergency services offered

"Derek was fantastic to work with. We just built a new house and at the last minute before we moved in found out we needed the grout sealed on our tile. Derek was able to fit us in last minute and did a great job. He was very easy to communicate with and was very detailed before, during and after the work was complete to make sure we were happy. I highly recommend him for this or other projects. We’ll be working with him in the future for sure."
Before
After
Before
After
Before

+8

Response time1 day
12 neighbors recently requested a quote
Recommended by93%of homeowners
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FAQs for furnace / forced air heating system install or replace projects in Johns Island, SC

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 Johns Island, SC 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.