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Enhance Your Home's
Indoor Air Quality

Since 2000, Mainstream® Electric, Heating, Cooling, and Plumbing has excelled at providing Spokane homeowners with top-notch home care, including air quality testing and quality clean air solutions.

Mainstream Truck and Home During Duct Cleaning


Trusted Air Quality Testing Services

Spokane and Northern Idaho homeowners can now experience cleaner, healthier living with Mainstream’s indoor air quality testing services.

Our dedicated team provides comprehensive assessments to ensure your home’s air quality meets the highest standards. We’re your trusted partner in enhancing your indoor environment.

Our cutting-edge technology and expertise allow us to identify and address air quality issues promptly and safely. Whether you’re concerned about allergens, pollutants, or mold, we’ve got you covered. Enjoy peace of mind with our professional air quality testing near you.

Breathe easier, live better – contact us today to schedule your air quality assessment!

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Indoor Air Quality Services

Air Filters

Keep your HVAC system in peak condition year-round with our comprehensive maintenance for lasting performance.

Indoor Air Quality Testing

Discover the origin of your indoor air quality concerns and unlock tailored solutions to purify your home environment effectively.


Control the humidity in your home year-round with expert installation and care of home humidifiers.

UV Filters

Upgrade to intelligent climate control with our smart thermostat installation for precision and convenience.


Make HVAC dreams a reality with flexible financing, providing convenient and affordable solutions for your home comfort.

The Mainstream Difference

Why Spokane Homeowners Choose Mainstream

Welcome to Mainstream – your one-stop solution for all your electrical, heating, cooling, and plumbing needs. Here’s why you should trust us with your home services:

Flexible Scheduling

We respect your time and prioritize efficient communication. We ensure minimal wait times for our technicians, allowing you to spend more time enjoying your home. Expect a call before our technician arrives, giving you the flexibility to plan your day accordingly.

Transparent Pricing

No surprises, no hidden costs. Our upfront pricing provides competitive quotes tailored to your specific service requirements. You'll receive a detailed breakdown of the work involved, ensuring transparency and total peace of mind.

Expert Technicians

Our friendly, skilled technicians are experts in electrical, heating, cooling, and plumbing services. With state-of-the-art tools and expertise, we guarantee precise, code-compliant work. Your home will be left spotless, reflecting our commitment to cleanliness and professionalism.

Mainstream Technician Standing Next to Open Truck Door


We Take Care of Your Whole Home

Spokane residents have trusted Mainstream as their full-home service provider for over 20 years, taking care of all their maintenance, installation, and repair needs.

Mainstream Offers

Current Special Offers

Indoor Air Quality

Frequently Asked Questions

When selecting an air filter, it’s essential to consider its MERV rating, which ranges from 1 to 20. Filters with higher ratings offer finer filtration, but not all levels are suitable for residential use.

MERV ratings 16 through 20 are typically reserved for specialized environments like hospitals and cleanrooms. For home use, filters with ratings between MERV 5 and 13 work just fine.

While a higher MERV rating may seem preferable, it’s not always necessary and can potentially hinder your HVAC system’s efficiency. The optimal MERV rating strikes a balance between effective filtration and maintaining system efficiency.

So while the range typically is broad for homes, in Spokane, we recommend a MERV rating between 8 and 10 for your home filter. These filters effectively capture airborne particles, enhancing indoor air quality without significantly increasing energy costs.

If you’re unsure when to replace your home’s air filter, watch out for these telltale signs indicating it’s time for a replacement. These indicators shed light on the crucial role air filters play in enhancing your home’s comfort and how a small investment of time and money can yield significant improvements:

  1. Visible Dust Around Vents: It’s time to replace your filters when you can see visible dust accumulating on and around vents.
  2. Dirty or Clogged Filter: A visibly dirty or clogged filter should be replaced promptly.
  3. Extended Heating/Cooling Cycles: Longer HVAC cycles signal reduced airflow due to a clogged filter.
  4. Higher Energy Bills: Increased energy consumption may result from a clogged filter.
  5. Declining Indoor Air Quality: Worsening air quality suggests an overdue filter replacement.
  6. Hot A/C Unit: Excessive heat from the A/C unit indicates restricted airflow, often due to a dirty filter.
  7. Uncertain Last Replacement: If you’re unsure when the filter was last changed, it’s likely overdue and time to be replaced.

To determine the correct size of your air filter, you can check for the air filter dimensions typically labeled on the side of the filter. Look for two size measurements: a ‘nominal’ size, often in larger print, and an ‘actual’ size, usually in smaller print. It’s crucial to get the right size filter for your HVAC system’s health. A filter that doesn’t fit properly won’t effectively capture airborne particles. If the filter is too small, it will leave gaps for debris to enter, while one that’s too large won’t fit into the slot. Trimming it down isn’t recommended, as it can create gaps allowing contaminants to bypass filtration. Alternatively, you can examine your existing air filter, measure it yourself, or measure the air register or air filter slot to ensure the correct size.

Typically, air filter manufacturers and HVAC experts advise replacing your air filter every 90 days, or roughly every 3 months. However, this timeline may vary based on several factors, including your home’s location (such as dusty or dry climates), the presence of pets, and the age of your HVAC system and equipment.

Absolutely. Mainstream, along with select UV air purifiers, delivers genuinely effective results. Amidst a sea of UV air purifier products boasting exaggerated claims, Mainstream’s utilization of proven UV technology sets it apart. This technology, rigorously tested in EPA and FDA certified labs, validates our assertion of achieving a 99% inactivation rate for most viruses and bacteria on the initial pass.

Trusted in sensitive environments, including homes around Spokane, WA, Mainstream’s UV filters showcase their prowess in powerful air purification. Utilizing potent UVC light, the UV technology employed by Mainstream technicians processes the air in a room with remarkable efficiency, circulating it three to six times hourly. This process significantly reduces pathogen exposure, ensuring the air you and your loved ones breathe remains fresh and safe.

Yes, UV air filters really work. Extensive research has shown that UV-C light, within specific wavelengths and durations, effectively neutralizes viruses, bacteria, mold, mildew, and fungi by disrupting their DNA or RNA, rendering them unable to function or reproduce. UV light also aids in preventing secondary allergies caused by airborne allergens. However, not all UV air filters are created equal, and effectiveness varies. We only use UV filters that are engineered to deliver reliable performance and superior air purification.

We use UV filters that have undergone independent research studies and rigorous testing in certified labs endorsed by the EPA and FDA. The UV filter technology installed by Mainstream technicians has been scientifically proven to eradicate germs, bacteria, viruses, while also reducing volatile organic compounds (VOCs) and odors. Through independent laboratory tests, Mainstream’s UV filters consistently disinfect the air and deactivate a broad spectrum of bacterial and viral pathogens, ensuring cleaner and healthier indoor air quality.

UV air filters, also known as UV air purifiers, are devices designed to improve indoor air quality using ultraviolet (UV) light technology. Here’s how they work:

  1. Air Filtration: UV air purifiers initially capture air and pass it through a filter. This filter helps to remove larger particles such as dust, pollen, and pet dander from the air, improving overall air quality.
  2. Exposure to UV-C Light: Once the air passes through the filter, it enters a small internal chamber within the UV air purifier. Here, the air becomes exposed to UV-C light, which is a specific type of ultraviolet light known for its germicidal properties.
  3. Microbial Inactivation: UV-C light effectively neutralizes or kills microorganisms such as bacteria, viruses, and mold spores that are present in the air, helping to reduce the spread of airborne pathogens and improve indoor air hygiene.
  4. Additional Filtration (Optional): Some UV air purifiers include an additional filtration stage after exposure to UV-C light, where the air passes through another filter before being released back into the room. This secondary filtration stage further improves air quality by capturing any remaining particles.

However, it’s essential to note that while UV air purifiers are effective at removing airborne pathogens, they may not effectively remove volatile organic compounds (VOCs) or gases from the air. Additionally, UV air purifiers can emit ozone, which may be a concern for individuals sensitive to ozone exposure.

Ensure your home remains a safe and healthy environment with regular maintenance of UV filters. Our expert technicians offer professional HVAC installation and maintenance services to keep your UV filters operating at peak performance, guaranteeing optimal air quality year-round.

Don’t compromise on indoor air quality. Upgrade to UV filters today and enjoy cleaner, fresher air for you and your loved ones.

Indoor air quality is crucial for maintaining a healthy and comfortable living environment, as people spend the majority of their time indoors. According to the EPA, here are the typical pollutants found in indoor air and their sources:

  1. Combustion Byproducts: These include carbon monoxide (CO) and particulate matter, which can be emitted from sources such as tobacco smoke, wood and coal heating appliances, cooking stoves, and fireplaces.
  2. Substances of Natural Origin: Pollutants like radon, pet dander, and mold can originate naturally within indoor environments. Radon, a radioactive gas, can seep into buildings through cracks in the foundation. Pet dander and mold spores are common allergens found indoors, especially in poorly ventilated areas.
  3. Biological Agents: Mold, bacteria, and viruses can proliferate in damp or humid indoor environments, leading to respiratory issues and allergies.
  4. Chemical Contaminants: Cleaning supplies, paints, insecticides, and other household products can introduce volatile organic compounds (VOCs) into the indoor air. These chemicals can off-gas and contribute to poor air quality, especially in poorly ventilated spaces.
  5. Building Materials: Some pollutants originate from building materials themselves. For example, asbestos fibers can be released from deteriorating insulation, while pressed wood products may emit formaldehyde and other harmful chemicals through off-gassing.
  6. Outdoor Sources: Outdoor air pollutants, such as smoke, vehicle emissions, and industrial pollutants, can infiltrate indoor environments through open doors, windows, and ventilation systems. Radon gas can also enter buildings from the surrounding soil.

Other factors affecting indoor air quality include the air exchange rate, outdoor climate, weather conditions, and occupant behavior. Proper ventilation, air filtration, and maintenance of HVAC systems are essential for controlling indoor air pollutants and ensuring a healthy indoor environment.

At Mainstream, we offer comprehensive indoor air quality solutions, including air purifiers, ventilation systems, and HVAC maintenance services, to help you breathe easier and enjoy cleaner indoor air. Contact us today to learn more about our indoor air quality services and schedule a consultation. With Mainstream, prioritize your health and well-being by improving the air quality in your home.

Improving indoor air quality is essential for maintaining a healthy and comfortable living environment. Here are some recommendations to help you achieve cleaner and fresher indoor air:

  1. Mats at Entrances: Place mats both inside and outside entrances to capture dust and allergens. Opt for mats with grates, water, adhesive, or other features designed to trap particles effectively.
  2. Remove Shoes: Encourage family members and guests to remove their shoes at the door to prevent tracking outdoor pollutants indoors.
  3. Regular Cleaning: Regularly mop floors, wipe walls, dust ceilings, vacuum curtains and blinds, and clean surfaces where dust accumulates. Use a high-efficiency vacuum cleaner with a HEPA filter to effectively remove dust and allergens.
  4. Bedding Maintenance: Change bed linens frequently and consider encapsulating mattresses and pillows with protective covers to reduce exposure to dust mites and allergens.
  5. Carpet and Upholstery Cleaning: Schedule wet extraction cleaning for carpets, rugs, and upholstered furniture to remove embedded dirt and allergens.
  6. Declutter and Encapsulate: Remove or encapsulate old items such as clothes, books, and plastics that may accumulate allergens over time.
  7. Address Moisture Issues: Thoroughly clean and dry damp areas to prevent mold growth. Seal air leaks and waterproof vulnerable areas to reduce moisture infiltration.
  8. Filtered Air Circulation: Install inlet and outlet fans to create filtered air circulation and maintain positive pressure indoors. This helps prevent outdoor pollutants from entering the home.
  9. HVAC Maintenance: Replace HVAC filters regularly to ensure efficient air filtration and circulation throughout your home.
  10. Humidity Control: Maintain indoor humidity levels between 40% and 60% to discourage mold growth and improve respiratory comfort. Use a humidifier and humidistat to monitor and regulate humidity levels as needed.
  11. Indoor Air Quality Monitoring: Invest in an indoor air quality monitor to track pollutant levels and CO2 concentrations. This can help you identify areas that require additional ventilation or filtration.
  12. HEPA Filters: Consider installing HEPA filters in your HVAC system or using standalone air purifiers to remove airborne particles, allergens, and pollutants effectively.
  13. Trash and Waste Management: Dispose of trash promptly to prevent the buildup of indoor pollutants and odors. Avoid letting trash accumulate indoors overnight.

By implementing these strategies and investing in quality air filtration solutions, you can significantly improve the indoor air quality in your home, creating a healthier and more comfortable living environment for you and your family.

Contact Mainstream today to learn more about our indoor air quality services and solutions. With Mainstream, breathe easier and enjoy cleaner air in your home.

A whole-home air purifier can vary widely in price. Purchase and installation costs depend on a number of factors – one of which is the size of your home.

Good indoor air quality helps you breathe fresher, cleaner air. An easy way to keep the air in your house free from bacteria, allergens, and harmful pollutants is by using an air purifier system and replacing your home air filter routinely.

If your home often feels stuffy, that can mean that your air keeps recirculating and bringing back contaminants that can affect your breathing. To keep your home clear of bacteria and allergens in the air, an air quality assessment is necessary.

Mainstream can give you upfront costs on air purification systems or air filtration maintenance for your home HVAC system. These systems help keep you and your family healthier with clean, fresh air year-round.

Elizabeth Kriner
Elizabeth Kriner

They were prompt,accurate in their proposal

Paul and Shane Did a fine job of bringing me up to codes

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S Brendemihl
S Brendemihl

Josh and Levi were fast, friendly and able to answer all my questions. Even my dumb ones 😉

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patsy moon
patsy moon

Ricky was so polite, I want to adopt him! He was worked his buns off! It was a difficult job but he refused to give up!! He danced a jig when he figured it out

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Nancy Betts
Nancy Betts

Anthony was very informative, helpful, and knowledgeable. His information helped make our decision on servicing our air conditioners. Great guy, too.

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Warren Stout
Warren Stout

Original appointment rescheduled a week later. Plumber arrived 3.5 hours late (3:30 pm vs. original 8-12 am window). Personnel were friendly, professional and completed work requested. They left the job site clean and tidy. Cost seemed high…

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Awards & Accreditations

Spokane's Finest

Mainstream® has earned the trust of the community, being recognized with the following awards and certifications.