Serving Mercer Island, WA and surrounding areas
Approved
In business since 1989
Free estimates
Emergency services offered
"The serviceman was very friendly, informative and efficient . He didn't try to sell me repairs I didn't need! I will always call AAA for all maintenance and furnace repair in the future. I'm glad I found an honest company for once !!"
Serving Mercer Island, WA and surrounding areas
Approved
In business since 1994
Free estimates
Emergency services offered
"Mark's guys went above and beyond to replace my old furnace with a high efficiency model from Lennox, and upgrade my old electronic water heater to a gas water heater. It's done on time and passed inspection. We highly recommend their services."
Serving Mercer Island, WA and surrounding areas
Approved
In business since 1921
Emergency services offered
Warranties offered
"Our Greenwood Technician, Sam, really provides us assurance that our gas furnace is still functioning adequately, but detailed why it may be time to consider replacing our aging water heater and furnace water pump system before likely damage occurs. Sam is a most genuine and reassuring professional - He helps us know just what may need maintenance and what is still sound. It is a joy to work with a trustworthy and competent professional"
Serving Mercer Island, WA and surrounding areas
Approved
In business since 1983
Warranties offered
Customers say: Quick response
"Another company told me I needed a blower motor and I shopped around for prices. Bob informed me that I may not need a motor. After describing the situation and listening to his very detailed and knowledgeable explanation, I have decided to wait and test the blower some more. Bob was very honest and I will hire him next time I need my furnace repaired."
+2
Serving Mercer Island, WA and surrounding areas
Approved
In business since 1975
Free estimates
Emergency services offered
"I had three estimates at our house for our conversion from a gas forced-air furnace to a heat pump/gas furnace installation. I was most impressed by Evergreen's rep. Scott, as he was very helpful in explaining the technology and was the only one of the three to do a J load calculation on our home. I also felt after the estimates were all given that Evergreen's was the best buy in terms of the product features vs. overall cost. As I researched our installation I realized that my mother's all-electric home would be better served by a heat pump as well. Again, Scott did the best job of all three estimators there as well.
After the down payment of 50% of the cost the installation was set up within two weeks for both locations. The work was done on time and efficiently. My mother's job was done in a few hours, mine took a couple of days. I'm happy to say that both units are performing perfectly, through both the colder weather of March and the warmer than usual days we've had in April.
There were a couple of things that should be mentioned, not major issues but worth noting.
The installation of our heat/pump and furnace did not meet City Code on the initial inspection as the condensation pump was placed on the floor. City code required it to be 18 inches off the floor due to a potential for an explosion should there be a gas leak. The correction was done within a few days, but I did have to schedule a city inspector on two different days. The city inspector remarked that the installer 'should have known better'.
On my mom's split heat pump the indoor blower unit began making a loud clanking noise one month into use. Evergreen was quick to come out, mom called on Sunday morning and was able to have a crew come out the next day. Apparently the installers had missed a mounting clip on the external cover of the indoor unit and over time the casing sagged enough that the rotating fans began to hit the inside of the case.
Several weeks after our work was done I was called by the financial office asking me to pay the remaining 50% balance. I pointed out that it had been paid on the day the work was done, but apparently the payment was not correctly registered as having been paid by their accounting office. Fortunately I was able to point to my credit card statement indicating that the balance had been paid in full.
Overall Evergreen did a professional job from start to finish and I have no hesitation in recommending them. Given their expertise and experience I have no doubt that my equipment will continue to be well serviced going forward. "
+9
Serving Mercer Island, WA and surrounding areas
Approved
In business since 2011
Free estimates
Emergency services offered
"Allred is THE best. I had mini-split AC/heat installed almost a year ago. I love it and it's saving me significant money over using my central heating system. And no more hassle with portable air conditioners. I should have done this years ago. Even better is the 5 star customer service. Last week I had difficulty turning on the AC for the first time since last summer. I urgently called David on a Sunday. He immediately dove in to get me scheduled. Sebastian called me before making an on-site visit. Patiently walked me through a simple troubleshoot and shazaam! I turned right on. A+++ to both of them."
+9
Serving Mercer Island, WA and surrounding areas
Approved
In business since 1997
Free estimates
Warranties offered
"This company has been consistently good for me and my house in the last 11 years. Having to deal with changing a furnace, a water heater, and last week a heat pump , is not for the faint of heart. I have to say, John and Debbie made it relatively painless. They worked on my timetable and were very accommodating. Most of the technicians that installed my furnace 11 years ago are still there. Those guys are fast and efficient. AND they clean up after themselves! Which is something I can't say about the electrician, the roof people, the window replacement guys I've had to deal with. I never write reviews (unless I am mad beyond reason:), but for Bassett - thank you guys for being so easy on my nervous system!"
Serving Mercer Island, WA and surrounding areas
Approved
In business since 1954
Emergency services offered
Warranties offered
"The guy that came out was awesome. Honest, polite, and hard working. He showed up on time, did the work, kept up informed the whole way through, and restored our confidence. We had another company out prior for the same service but the person didn't even start, rather just wanted to scare is into getting a whole new heat pump and furnace, saying it was on the brink of failure with an estimate between $12K-$20K. We said we wanted a 2nd opinion and thank goodness we did. Day and Nite acknowledged that our system was at 14-15 years, but saw no need to replace. We will call Day and Nite for our next maintenance for sure!"
Serving Mercer Island, WA and surrounding areas
Approved
In business since 2002
Free estimates
Emergency services offered
"Our furnace had stopped working after a neighborhood power outage and we had no heat. AirPros responded quickly to our inquiry on Home Advisor and were able to fit us into their schedule that same day. Jerry arrived within a couple of hours to diagnose the problem and install a replacement thermostat. Overall excellent service."
Serving Mercer Island, WA and surrounding areas
Approved
In business since 2015
Free estimates
Emergency services offered
"Professionl! From beginning to completion. We highly recommend this company for your all your furnace jobs."
+1
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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