What does DwellWell Certified℠ mean?

DwellWell Certified℠ means the rental has been inspected for the following:

  • Mold - the rental had no visible signs of mold, humidity readings reflected low growth readings, and inside spore counts are less than outside spore counts
  • Allergens - the rental’s particle counts for mold, pollen, fibers, insect parts, and skin cells do not pose an immediate risk for most short-term guests. In some cases, people with chronic respiratory problems or people with highly sensitive reactions may want to find alternate housing. This is an extreme precaution addressed towards a small percent of the population; unless otherwise noted, all DwellWell Certified℠ rentals offer no allergen health hazards for short-term guests
  • Water Safety - the rental’s tap water has been tested and is compliant with EPA standards for lead, bacteria, pesticides, nitrates, nitrites, chlorine, hardness, and pH
  • Carbon Monoxide - the rental has functioning carbon monoxide alarms installed to code within the rental space; the rental also shows safe levels of carbon monoxide when measured with a digital hand-held meter
  • Fire - the rental has functional smoke alarms installed to code and provides one or multiple fire extinguishers per state regulations
  • Evacuation Planning - the rental has an evacuation map clearly displayed per state code. The map also shows the location of gas shut off valves, fire extinguishers and pull fire alarms

I'm a guest thinking of staying in a DwellWell Certified℠ home. What does that mean?

As a guest, DwellWell certification means:

  • The rental has smoke and carbon monoxide alarms in accordance with state regulations
  • The rental has fire extinguishers in accordance with state regulations
  • The rental provides a safety map documenting the location of gas shut off valves, fire extinguishers, fire pull alarms, and emergency escape routes
  • The rental’s tap water is safe per EPA standards
  • The rental’s mold spore counts are at a level that pose no health hazard to the general population
  • The rental’s allergen counts for mold, dust, fibers, insects, and skin cells are at a level that pose no health hazard to the general population

What is the DwellWell AllerScore℠?

The DwellWell AllerScore℠ is a custom ranking algorithm for allergens based on the needs of short term rentals and their guests. Just because allergens exist, doesn’t mean guests or hosts are at risk. We try to make the risks easier to understand.

  • 5/5 - Low levels reported with no action needed.
  • 4/5 - Moderate levels reported with no known health risks to short-term guests.
  • 3/5 - High levels reported with no risks to short-term guests.
  • 2/5 - High levels reported with potential short-term risks to specific populations (those with COPD or other comorbidities, those with highly sensitive allergic reactions, etc.). Please refer to the detailed write-up in the Allergy section of this report for specific populations that may be at risk based on your lab results.
  • 1/5 - High levels with potential short-term risks to the general population.

What is the DwellWell SporeScore℠?

The DwellWell SporeScoreSM is a custom ranking algorithm for mold spore counts based on the needs of short term rentals and their guests. Just because mold spores exist, doesn’t mean guests or hosts are at risk. We try to make the risks easier to understand.

  • Pass – Total indoor mold spore count was less than total outside spore count. Conclusion: rental shows no signs of elevated mold growth.
  • Pass – Total indoor mold spore count was above total outside spore count; however, the specific mold spores known to cause acute allergic reactions (Cladosporium and Penicillium/Aspergillus) were less than, or within 10% of the control sample. Conclusion: potential reactions to mold may be due to the outside environment as opposed to the interior of the rental.
  • No Pass - Total indoor mold spore count was above total outside spore count; additionally, the specific mold spores known to cause acute allergic reactions (Cladosporium and Penicillium/Aspergillus) were above (higher than 10%) the control sample. Conclusion: rental may be at risk for mold growth.

What should I do in order to prepare for my inspection?

There are some basic things that can help ensure a quick and successful inspection

  1. Keep doors and windows closed for at least 24 hours prior to your inspection. This helps to assure the indoor mold sampling tests are taken under optimal conditions.
  2. Hold off on deep cleaning for 48 hours prior to the inspection. Cleaning chemicals and vacuum dust can stir up indoor air and potentially skew sample results.
  3. Make a note of any areas of concern - water damage, flaking paint, etc. This information allows us to best evaluate the space and to sample accordingly.
  4. Ensure your smoke and carbon monoxide detectors are up to code. For more information on installing smoke and carbon monoxide detectors in California, visit:
  5. Ensure you have a multi purpose fire extinguisher (look for A, B, and C classifications on the label) for every 3,000 square feet of rental space. The distance to the fire extinguisher from anywhere in the rental cannot exceed 75 feet.
  6. For rentals within the city of San Francisco, Administrative Code, Chapter 41A.5(g) requires that when hosting, you must post a clearly printed sign inside your unit on the inside of the front door that provides information about the location of all fire extinguishers in the unit and building, gas shut off valves, fire exits, and pull fire alarms.

I’d like to stay in a DwellWell Certified℠ rental, but it’s hard to filter for that on short-term rental website

We will be working with HomeAway, Airbnb, and others to make DwellWell Certified℠ rentals easier to find.

I can’t find any DwellWell Certified℠ rentals in my desired location.

New hosts are getting certified every day. If your next host isn’t DwellWelling, ask them to contact us!

More questions? Please contact us!

Sign up for the Newsletter!

Sign Up