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

Avatar for Greenwood Heating and Home Services
Greenwood Heating and Home Services
4.6(
425
)
Gas Furnace / Forced Air Heating System - InstallBoiler or Radiator Heating System - Install or ReplaceBoiler or Radiator Heating System - Install or Replace - For Business+43 more

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"
Signature Install
Greenwood Plumbing
Greenwood Fleet
Greenwood University
Response time11 hrs
Response rate100%
6 neighbors recently requested a quote
Avatar for Airpros Energy
Airpros Energy
4.7(
89
)
Heat Pump - Install or ReplaceBoiler or Radiator Heating System - Install or ReplaceBoiler or Radiator Heating System - Install or Replace - For Business+19 more

Serving Mercer Island, WA and surrounding areas

Approved

In business since 1994

Free estimates

Emergency services offered

"Great job doing maintenance service on the furnace and heat pump. Received informative answers to my questions. Very professional interaction. Been doing business with AirPros Energy for over 10 years servicing my furnace, heat pump, gas fireplace, tankless water system and have always been satisfied."
Comfort Built for the PNW
3 neighbors recently requested a quote
Recommended by92%of homeowners
Avatar for Allred Heating Cooling Electric
Allred Heating Cooling Electric
4.7(
151
)
Electric Furnace / Forced Air Heating System - InstallGas Furnace / Forced Air Heating System - InstallDuctless Mini-split Heating System - Install or Replace+13 more

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."
Additional Photos
repair
Van
Gas Fireplace install
Additional Photos

+9

Response time2 days
Response rate100%
23 neighbors recently requested a quote
Avatar for BASSETT HOME HEATING INC.
BASSETT HOME HEATING INC.
4.5(
67
)
Gas Furnace / Forced Air Heating System - InstallHeat Pump - Install or ReplaceDuctless Mini-split Heating System - Install or Replace+3 more

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!"
Additional Photos
Response time2 days
8 neighbors recently requested a quote
Recommended by95%of homeowners
Avatar for Evergreen Home Heating & Energy
Evergreen Home Heating & Energy
4.4(
105
)
Boiler or Radiator Heating System - Install or ReplaceBoiler or Radiator Heating System - Install or Replace - For BusinessBoiler or Radiator Heating System - Repair or Service+43 more

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.  "
Additional Photos
Additional Photos
Additional Photos
Additional Photos
Additional Photos

+9

Response time5 hrs
Response rate100%
4 neighbors recently requested a quote
Avatar for Day & Nite Plumbing & Heating, Inc.
Day & Nite Plumbing & Heating, Inc.
4.3(
225
)
Boiler or Radiator Heating System - Install or ReplaceBoiler or Radiator Heating System - Install or Replace - For BusinessBoiler or Radiator Heating System - Repair or Service+43 more

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!"
Outdoor Ductless Unit
Indoor Ductless Unit
Outdoor Ductless lineset and Unit
Pump System
3 neighbors recently requested a quote
Recommended by82%of homeowners
Avatar for SeaTown Electric Heating and Air
SeaTown Electric Heating and Air
4.7(
1,638
)
Electric Furnace / Forced Air Heating System - InstallHeat Pump - Install or ReplaceGas Furnace / Forced Air Heating System - Install+4 more

Serving Mercer Island, WA and surrounding areas

Approved

In business since 2014

Free estimates

Emergency services offered

"In the beginning the 4 nations of Electric, Plumbing, Heating, and Air lived in harmony. Because Seatown maintained the balance. We have used Seatown for 15 projects now for spanning all their services. When we bought our old home, we had Seatown and other competitors provide quotes on installing HVAC. Their planning, thoughtfulness to our needs, price is why we chose them. As the summer heat spikes, we don’t regret our choice and are glad that our home is an oasis. Every time they come out, we ask for more things to be done than what was agreed to and every time they work to extra hard to get it all done. They go the extra mile in doing some simple projects for free and giving advice on how to lower our costs as new homeowners. I have been able to call or text them about issues or ideas and get advice with out the pressure to buy services. That’s not something you find in just any company. Their staff has always been polite, clean, and diligent about getting the job right the first time. As we continue to fix up our old house, we will be using Seatown for projects large and small and we hope you will as well."
Seattle's Rewire Specialists
Generator
Tesla Chargers
Knob and Tube Removal
Ductless Install

+26

Response time1 day
12 neighbors recently requested a quote
Recommended by93%of homeowners
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Showing 1-10 of 319

FAQs for furnace / forced air heating system install or replace projects in Mercer Island, WA

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 Mercer Island, WA 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.