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

Avatar for Ranger Heating & Cooling
Ranger Heating & Cooling
4.8(
104
)
Electric Furnace / Forced Air Heating System - InstallDucts & Vents - Install or ReplaceElectric Furnace / Forced Air Heating System - Repair+43 more

Serving Issaquah, WA and surrounding areas

Approved

In business since 2004

Free estimates

Emergency services offered

"We were very pleased with the quick response, detailed information, professional and courteous staff at all levels. Our old furnace died in November on a Friday. Other businesses couldn't get anyone out to repair and replace it for 2-3 weeks. Ranger had it replaced on Monday for us. This week our electronic air filter quit working. Again we had a quick response with a simple fix at no charge. All of our questions were answered fully and information given about the latest models but with no pressure to buy. We will absolutely use Ranger again and refer our friends and family to them."
Dominic with our great customer standing beside a Mitsubishi ductless outdoor unit.
Additional Photos
Additional Photos
Additional Photos
Response time2 hrs
Response rate100%
6 neighbors recently requested a quote
Avatar for Greenwood Heating and Home Services
Greenwood Heating and Home Services
4.6(
425
)
Gas Furnace / Forced Air Heating System - RepairDucts & Vents - Install or ReplaceElectrical Baseboard or Wall Heater - Repair+43 more

Serving Issaquah, 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%
13 neighbors recently requested a quote
Avatar for Action Heating & Air Conditioning
Action Heating & Air Conditioning
4.9(
224
)
Electric Furnace / Forced Air Heating System - RepairGas Furnace / Forced Air Heating System - RepairHeat Pump - Repair or Service

Serving Issaquah, WA and surrounding areas

Approved

In business since 1983

Warranties offered

Customers say: Quick response

"Bob was quick to respond to our service call. He took the time to explain the furnace and a/c system, things that need to be looked out for and how to care for the system. Passed on some great knowledge of the furnace and a/c. Also gave us excellent tips on a furnace filter and a/c cover. Would definitely recommend him to anyone....anytime. His knowledge on furnace's is excellent and great to work with."
Rheem Super Quiet 80
New Rheem  furnace
New Furnace & AC
New Furnace & AC
indoor unit

+2

Response time12 hrs
Recommended by99%of homeowners
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 Issaquah, 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 Evergreen Home Heating & Energy
Evergreen Home Heating & Energy
4.4(
106
)
Electric Furnace / Forced Air Heating System - InstallGas Furnace / Forced Air Heating System - InstallBoiler or Radiator Heating System - Install or Replace+43 more

Serving Issaquah, WA and surrounding areas

Approved

In business since 1975

Free estimates

Emergency services offered

"Evergreen installed a new hybrid heat pump system in my house. After researching the options, Evergreen was not only the most reasonable price, but they also scoped out a hybrid system where they would install new duct work and a single air exchanger in the attic and a minisplit in the basement. Scott, the sales person, did not try to upsell me on number of zones (others tried to get me to get 2 units in the basement) and after 2 months with the system, the single unit in the basement is heating the whole basement to our needs. All this was done at a price still considerably lower than the "standard" system price being offered by one of the bigger, similarly named companies. Evergreen was also the only company to propose a hybrid system where they would install a single exchanger in the attic and run new ceiling ducts to the rooms. This was appealing because we don't need to have the cassettes in each room and we didn't need to line the outside of the house with conduit for the cassettes (also the bathroom gets heat, too). Scott was great to work with, answered all my questions, and did his best to size the system correctly. Installation was smooth. There was a small hiccup where the installer accidentally broke a basement window, but Evergreen squared it away. Don and his team were great and the inspections passed. After install support has been great. Denise has been responsive to my questions. Overall, the experience was great with Evergreen and I highly recommend them."
Additional Photos
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+9

Response time5 hrs
Response rate100%
2 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 Issaquah, WA and surrounding areas

Approved

In business since 1954

Emergency services offered

Warranties offered

"Rob came out to review our existing system and helped us figure out what kind and brand of heat pump would work best with our system. He was very patient and informative, and answered all our questions without any pressure or up-sells (we had quotes from five providers). We signed the contract and payed our deposit in June 2021, but unfortunately global supply chain issues delayed the parts being received. Day & Nite were communicative of the issue and offered several alternatives, including a refund of the deposit. We opted to wait for the parts. It took four months, but the techs (lead by Jeff B) were fantastic and very accommodating in how we wanted piping and wiring routed. We are very pleased with how it's turned out and loved working with a local (and family owned!) company! Our gas water heater is due for replacement soon, and we'll be coming back to Day & Nite for that!"
Outdoor Ductless Unit
Indoor Ductless Unit
Outdoor Ductless lineset and Unit
Pump System
3 neighbors recently requested a quote
Recommended by82%of homeowners
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FAQs for furnace / forced air heating system install or replace projects in Issaquah, 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 Issaquah, 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.