Upfront pricing: you’ll never pay more than you’re quoted

Expert advice from professional, licensed, certified technicians

Flexible scheduling, ask about same-day service!

Get Reliable Home Generator Installation the First Time

We offer a full line of installation, maintenance and repair services your home generator system may require, no matter the problem or time of year. You can count on the trusted professionals at Mainstream for exceptional service and quality craftsmanship every time.

Check out why your neighbors trust us to get the job done right

Great seasonal service!

Great seasonal service today on our furnace and air handler/AC unit. Matt Miller did a very courteous and professional job describing all that he was doing and did and made additional recommendations on future service and care. He was very knowledgeable and had great interpersonal skills. We have used Mainstream for other projects as well and have always been satisfied with the work performed. I can say with honesty that they have not always been the cheapest, but they have always been the best. 'Good service is not cheap and cheap service is not good.' If you ever need a plumber, electrician or HVAC specialist, I highly recommend Mainstream.
Greg A.

Respectful

Cody was respectful, personable, courteous, answered all our questions we had during his visit, knowledgeable. Cody helped us get in touch of the appropriate people, to finance the work that our home needs. He helped get the work scheduled so that we wont need to wait longer to get the work taken care of.
Crystal N.

Highly Recommend

The entire team was very responsive and nice. Handled scheduling quickly. Process was clearly outlined at multiple points in the job to ensure expectations were being met. Took 48 hours from time I reached out to complete issue resolution. Highly recommend
Jenn C.

Kudos

Jaymin was very professional and friendly. Was knowledgeable and got right down to business. Did a great job! He deserves a KUDOS!! 👍 Daryl was also very professional and friendly. He was knowledgeable and explained the problem very clearly. He's also a good salesman! KUDOS to him, as well!! 👍
Judy W.
Read all our reviews

Which Home Generator Do I Need?

Whether you’re looking to use a generator at your home, workplace, or for a recreational vehicle, there are a few factors to consider:

What are the Different Types of Home Generators?

There are plenty of home generator options to choose from, including whole-home standby generators; large, medium, and small inverters; portable generators, and more. Many standby home generators are powered by natural gas, and switch on automatically in a power outage without requiring refueling. Inverters cover a wide range of uses and can power anything from a few appliances to a whole small house. Portable generators usually offer the best value for your dollar, but are often limited in their output. Call the home generator experts at Mainstream for a comprehensive proposal to get help determining which home generator works best for you!

What Size Generator Should I Buy for My Home?

The size of the home generator that you choose to buy depends mostly on what you’ll be using it for. If you need a home generator with capacity to power your entire home for prolonged periods during an emergency, then you’ll probably need what’s called a standby generator. These are permanently installed outside your home, and are generally the most expensive option. Large and medium inverters are another good option if you’re only looking to power a few key appliances during a power outage.

How Much Power Does My House Need?

Your home generator should be able to power the combined wattage of all of the appliances you want running when the power goes out. Calculating exactly what wattage you need can be tricky, and is potentially dangerous if calculated incorrectly. The generator installation experts at Mainstream can help you decide exactly how much power your home needs with a personalized, home generator installation proposal.

Schedule a Home Generator Installation

Schedule your home generator installation cost estimate today to ensure your home’s electrical grid is running smoothly, protecting you all year long!

Special Offers in Spokane Valley, Washington

FREE Service Call with Repair
Free

Schedule Now
07/31/2022
Disclosure
Call for Conditions & Restrictions / Present Coupon at Time of Service / Not Available to Combine with Other Offers
$79 Once a Year, You’re in the Clear HVAC System Checks
Original Price: $ 129
Savings:$ 50
Sale Price:$79

Super convenient Heating & A/C Check. Why are checks important?

  • Keeps your systems running at peak efficiency
  • Helps prevent unexpected breakdowns
  • Extends the life of your equipment
  • Keeps your family safe from carbon monoxide leaks

Schedule Now
07/31/2022
Disclosure
Call for Conditions & Restrictions / Present Coupon at Time of Service / Not Available to Combine with Other Offers
$79 Off Any Repair
Free

Schedule Now
07/31/2022
Disclosure
Call for Conditions & Restrictions / Present Coupon at Time of Service / Not Available to Combine with Other Offers

Arrange a callback

Leave us your details below and we'll give you a call right back