
Serving Randallstown, MD and surrounding areas
Approved
In business since 2009
Free estimates
Credit card accepted
"They did a wonderful job for me when I needed the coil on my AC unit replaced. On time, Neat and tidy. Good work."





+8


Serving Randallstown, MD and surrounding areas
Approved
In business since 2009
Free estimates
Credit card accepted
"They did a wonderful job for me when I needed the coil on my AC unit replaced. On time, Neat and tidy. Good work."





+8

Serving Randallstown, 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."




Serving Randallstown, MD and surrounding areas
Approved
In business since 2000
Free estimates
Emergency services offered
"The process was easy and the service top notch from the estimate with the sales rep to scheduling and the install. Ill recommend them to anyone who needs heating and air services."


Serving Randallstown, MD and surrounding areas
Approved
In business since 1978
Free estimates
Credit card accepted
When looking for professional HVAC services, look no further than GLM Mechanical Services, Inc. \nWhat we offer is honest, open estimating, with strict attention to detail and on time delivery. All we ask is when calling PLEASE speak english. WE can't help you if we can't understand what you need to tell us. Unfortunately, we do not offer attic installations when outdoor temperatures are so hot that attic temperatures can reach 100 degrees or higher. We cannot ask our employees to work under those conditions. We can bring to the table a level of expertise not usually available to residential projects. We have several years experience providing prompt and reliable services building your dreams into reality. We will always meet and exceed all expectations. Proudly handling the Goodman and Airtemp brands of HVAC equipment. Give us a call, you will be glad you did. \n \nWe now accept Visa, Mastercard, & Discover.
Serving Randallstown, MD and surrounding areas
Approved
In business since 2006
Free estimates
Emergency services offered
"First, my project was to install, from scratch, a new HVAC system, including ducting, with tha furnace in basement (initially, it was upstears in a closed). Last year and early this year, I got 3 contractors on site, by direct call, and none of them answered my spefic questions but taking pictures and promising that will send an estimate. I never got it. I was getting anxious. So I got the idea go to Angi. First visit I got in the same day I put my request on Angie's site, called his boss advice me to just change the furnace. I could not, because the previous system was heating OK only one half of the house. Finally, next day I got AJB visit an made me happy. He understood perfectly what I wanted and my concerns and explained to better and quite ingenious solutions on my suggestions. I understood him perfectly because I have strong knowledge of aero-dinamicsor or fluid mechanics so I signed the contract right then. Now, I have a sweet warm house in every corner of it."





+6

Serving Randallstown, MD and surrounding areas
Approved
Super Service Award Winner
In business since 2010
Free estimates
Emergency services offered
"I had a different company come in they told me I needed a new furnace . This company came in cleaned the furnace then told me to get a new furnace filter.. it has been working good."





+118

Serving Randallstown, MD and surrounding areas
Approved
In business since 2013
Free estimates
Emergency services offered
"Had a full HVAC system installed including all new ductwork. Maurice and Tanner and Bob were super professional and very informative. Went above and beyond what was expected always stopping what they were doing to answer any questions we had. Jason Bowen was extremely polite and professional explained the whole system we were going to get and didn't try at all to upsell equipment, and didn't pressure us at all for the sale. W At your Service heating and cooling will be our go to for anything we ever need done!!!"





+1

Serving Randallstown, MD and surrounding areas
Approved (Corporate)
In business since 1945
Free estimates
Emergency services offered
"My service agent was online on time and very knowledgeable and told me all the things that was done to my furnace."


Serving Randallstown, MD and surrounding areas
Approved
In business since 2006
Free estimates
Emergency services offered
"They are very professional and answered all my questions. Replaced furnace and all piping in 2 1/2 days."





+5

Serving Randallstown, MD and surrounding areas
Approved
In business since 2025
Emergency services offered
Small jobs welcome
"Great service and fair pricing ! Most importantly they were on time, respectful of my home and did above and beyond what they were supposed to do . I had a problem with my heating system and they came on a moment notice and took care of my problem Thank you guys !"





+23
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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