NW Natural Preferred Contractors

Qualification criteria for new equipment installations.

Learn more about our qualifications criteria.


  • Maintains a contractor’s license in good standing for more than the last five years in the state they serve.
  • Maintains high levels of liability insurance and surety bond.
  • Maintains good ratings with the state licensing board and Better Business Bureau.
  • Maintains a high level of customer satisfaction.
  • Maintains a high level of customer satisfaction when recommended by us.
  • Maintains our required high level of NATE certified installers on staff. (NATE is a nationally recognized technical excellence credential for HVAC technicians.)
  • Provides a minimum one-year parts and labor warranty following installation of new equipment.
  • Maintains a local telephone number and professional office staff with answering service or voice mail messaging.
  • Responds to inquiries by telephone within one business day.
  • Sets in-home appointments and places a courtesy call if running late.
  • Performs furnace sizing and installation following all local codes, industry standards and manufacturer’s guidelines.
  • Provides a free written installation estimate based on an in-home consultation within three working days after the appointment.
  • Includes all costs (permitting, electrical, dismantling and/or removal) in the written estimate. If you, as a homeowner, will be responsible for any permitting or removal of equipment, this must be clearly explained and detailed in the estimate. You may be asked to call for the final inspection.
  • Keeps your home clean during installation and cleans up the jobsite after the work is complete.
  • Informs you of any rebates, tax credits or other incentives, and assists in the completion of the appropriate forms when the invoice is provided.
  • Assists you in ordering new gas service when applicable.
  • Find a Contractor—Find a NW Natural Preferred Contractor in your area.
  • What is NATE Certified—Learn about the nation’s largest independent, third-party certification organization for heating, ventilation, air conditioning and refrigeration (HVAC/R) technicians.
  • Contact us—If you find a NW Natural Preferred Contractor has failed to meet these criteria, please contact us . Your call will be forwarded to your area representative for mediation and resolution. Your satisfaction is most important to us.