Serving Herculaneum, MO and surrounding areas
Approved
Super Service Award Winner
In business since 2017
Emergency services offered
Warranties offered
"Great job with AC repair!"
+10
Serving Herculaneum, MO and surrounding areas
Approved
In business since 2003
Free estimates
Emergency services offered
"Very informative and detailed. Parts we needed not in stock we just couldn’t wait due to extreme heat conditions. Other than that I would highly recommend"
Serving Herculaneum, MO and surrounding areas
Approved
In business since 2014
Free estimates
Emergency services offered
"MCS techs were very courteous. New HVAC system install went well. They explained all their work professionally. Also found a crack in the flue and replaced which was overlooked by a previous contractor. They are very thorough and reasonable. I highly recommend MCS."
Serving Herculaneum, MO and surrounding areas
Approved
In business since 1954
Free estimates
Emergency services offered
"I’ve used this company twice. My husband has a medical condition that is affected by heat. The first time the air conditioner wasn’t working they made every effort to assess the problem immediately when I explained the medical condition. At the time they corrected the problem I was advised the system was probably 20 years old and we may have to consider a new system soon. The second time I contacted Comfortable Carla’s was about 4-6 weeks later when the system wasn’t working again. This lead to a system replacement. I was provided with different options, my questions were answered and the installation was completed as quickly as possible, especially in view of my husband’s medical issue. The staff was was professional, efficient and kept me apprised all throughout the process. I highly recommend this company."
+1
Serving Herculaneum, MO and surrounding areas
Approved
In business since 2006
Free estimates
Credit card accepted
"Very professional and knowledgeable. Repaired unit and educated me on tips to help maintain it as well. Pointed out issues with the unit installation which was installed in 2006. From condensation line hooked up wrong to finding a filter in the base of the unit, which belonged to the electronic filter system (unit is shipped with filters inside base). Then the air intake line for the heat pump unit never hooked up or ran to outside, and more. I can't say enough."
Serving Herculaneum, MO and surrounding areas
Approved
In business since 1982
Emergency services offered
Warranties offered
Founded in 1982. Team members that are drug tested and background checked insuring that the people in your home are safe. We specialize in repairing and replacing residential heating and air conditioning systems. "Fixed Right or It's Free"\nTechs available Sat & Sun call for appointment.
Serving Herculaneum, MO and surrounding areas
Approved
In business since 1980
Free estimates
Emergency services offered
"After telling their phone person the make, model, the fact that it had a large compressor on the top unit; and that my husband had run diagnostics, I worked from home to wait for the repair person. He arrived - and before I could tell him what was wrong, he said he couldn't work on it, they sent the wrong guy out. That he didn't work on built-ins. So he arranged the guy that *does* work on built-ins to come out the next day. The "built-in" repair person came the next day, only to tell me *he* couldn't work on it because my husband had vacuumed and recharged the system. He was very apologetic and nice, didn't charge for a service visit, and recommended another company. If they had a competent phone person that had at the minimum wrote down the information I had given, and relayed that to the repairmen, I would have saved myself two days of my time and could have gotten my repair done more quickly."
Serving Herculaneum, MO and surrounding areas
Approved
In business since 2025
Emergency services offered
Credit card accepted
"I had an excellent experience with RDI . From the moment I called, their team was prompt, professional, and incredibly knowledgeable. The technician arrived on time, explained everything clearly, and got right to work. They quickly diagnosed the issue with my system and had it up and running in no time."
Serving Herculaneum, MO and surrounding areas
Approved
Free estimates
Emergency services offered
Warranties offered
"Furance was not working, call House Doctor. They were out the next day and got it back up and running. Professional and efficient. Plus, very affordable."
+1
Serving Herculaneum, MO and surrounding areas
Approved
Customers say: Quick response
Spartan Electric is a family run business that prides ourselves in our professional quality work, unsurpassed customer service and cleanliness.
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.
From average costs to expert advice, get all the answers you need to get your job done.
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