APPROVED PLN RESPONSE 3 PLN+12.8.2022_2.48.55_PM+3259688BLD2022-1637
RESUB
APPROVED BY PLANNING
Dec 09 2022
Dec 09 2022
CITY OF EDMONDS
DEVELOPMENT SERVICE$
DEPARTMENT
This letter is in response to the comment about the noise concern. The unit is rated at 70 dBA. This is
measured from the manufacturer at 6 feet from the unit. When this is doubled, the decibels drop by 6.
This means around the fence line; our rating would be 64dBA. There is a solid wood fence on the
property line between the two houses. Solid wood fences reduce the decibels by 6-10clBA. This would
put our noise output on the neighbor's side at 58-54dBA. We will install a sound blanket to also help
reduce the noise. Sound blankets reduce the noise by a minimum of 5dBA- 40% reduction. At high end
of our noise, our unit would produce 53dBA on the neighbor's side of the property line. Although this
calculation is based on the maximum output possible and is likely going to be less during normal
operation, I have been allowed to install units louder than the 45dBA nighttime requirement with the
agreement of energy efficient usage during the quiet hours. Is this an option for this case? We agree to
complying to the nighttime usage restrictions.