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Top-Rated Furnace / forced air heating system install or replace pros in Long Green - Updated Nov 2026

Avatar for No-Frost Air Conditioning & Heating, LLC
No-Frost Air Conditioning & Heating, LLC
4.7(
411
)
Gas Furnace / Forced Air Heating System - InstallElectric Furnace / Forced Air Heating System - InstallGas Furnace / Forced Air Heating System - Repair+17 more

Serving Long Green, MD and surrounding areas

Approved

In business since 1971

Free estimates

Warranties offered

"This is an excellent company. We have used them for year to service our heating and air conditioning units. It became necessary to think about replacing the units. We have two. Decided to replace both at the same time. They came out on a Monday and gave us an estimate and came out on Thursday and Friday to do the work. They totally cleaned up after themselves and made sure everything was working properly. Then they called a few days later to see that everything was working well. I highly recommend this company. All the technicians are polite and competent. The office staff is nice beyond belief. If you need any heating/AC work done, this is the company to do it."
Additional Photos
Additional Photos
Additional Photos
Response time9 hrs
Response rate100%
14 neighbors recently requested a quote
Avatar for ARS of Maryland
ARS of Maryland
4.2(
181
)
Heat Pump - Install or ReplaceGas Furnace / Forced Air Heating System - InstallHeat Pump - Repair or Service+3 more

Serving Long Green, MD and surrounding areas

Approved (Corporate)

In business since 1945

Free estimates

Emergency services offered

"The technician was great. He explained what he was doing as he went along even though it was freezing outside. Checked my entire heating system to find the problem and replaced only the parts that were broken. Got my system back up and running in a little under two hours and was very pleasant and understanding when we asked him many questions and answered everyone so that we understood him. Thank you so much for your professional manner and courteousness. Got my hearing system to stop running in emergency mode and back to normal heat. Thanks"
New System Installation
163 neighbors recently requested a quote
Recommended by71%of homeowners
Avatar for At Your Service Heating & Cooling, LLC
At Your Service Heating & Cooling, LLC
4.3(
194
)
Electric Furnace / Forced Air Heating System - RepairGas Furnace / Forced Air Heating System - RepairGas Boiler or Radiator Heating System - Repair+1 more

Serving Long Green, MD and surrounding areas

Approved

In business since 2013

Free estimates

Emergency services offered

"We haven't had it installed. Jason our comfort advisor. Was very professional and cared about our needs. We had no heat due to water in the basement. He showed up Saturday morning. Non of the others wanted to hear our troubles. Thank you Jason and at your service heating. Can't wait for the installation"
Dundalk
Billboard 2
Billboard 3
Billboard 4
Billboard 5

+1

Response time11 hrs
Response rate95%
2 neighbors recently requested a quote
Avatar for BPPW Heating & Cooling
BPPW Heating & Cooling
4.3(
18
)
Gas Furnace / Forced Air Heating System - InstallOil Furnace / Forced Air Heating System - InstallBoiler or Radiator Heating System - Install or Replace+43 more

Serving Long Green, MD and surrounding areas

Approved

In business since 2007

Free estimates

Emergency services offered

"Mr. Bost did an excellent job for me for a reasonable price. I know he obtained the best deal for me on the furnace and the air conditioning unit. He answered all my questions. He was on the job when he said he would be; he was professional and courteous. The installation went smoothly, and I have had no problem with the furnace or air conditioner since they were installed in 2008."
Additional Photos
Additional Photos
Additional Photos
Additional Photos
Additional Photos

+2

Response time6 days
4 neighbors recently requested a quote
Recommended by100%of homeowners
Avatar for Paramount Heating & Air Conditioning, LLC
Paramount Heating & Air Conditioning, LLC
4.7(
117
)
Gas Furnace / Forced Air Heating System - RepairHeat Pump - Repair or ServiceThermostat - Repair or Reprogram

Serving Long Green, MD and surrounding areas

Approved

In business since 2008

Emergency services offered

Warranties offered

"Our air conditioning quit on us on what seemed to be the hottest day of the summer! My husband put in a request/quote and Alan called us within minutes. He came today (the same day as we called) and fixed it right up! We are back in the cool-ness!!! Thank you, Alan. Would highly recommend this company."
Recommended by100%of homeowners
HVAC Sales, LLC
5.0(
10
)
Ductless Mini-split Heating System - Install or ReplaceGas Boiler or Radiator Heating System - InstallGas Furnace / Forced Air Heating System - Install+3 more

Serving Long Green, MD and surrounding areas

Approved

In business since 1982

Warranties offered

Credit card accepted

We are a locally owned and operated company that values honesty and integrity in all aspects of our business. Our major focus is on the quality our work and producing outstanding results. We are committed to creating a level of value unmatched by any of our competitors. We look forward to building lasting relationships with our clients and guarantee your satisfaction!

Ductless system
Ductless spilt system
Ductless split system
Ductless split system
Heat Pump system

+6

Response time5 hrs
Response rate98%
Recommended by100%of homeowners
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FAQs for furnace / forced air heating system install or replace projects in Long Green, MD

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 Long Green, MD 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.