Lacey Act Declaration Form

IN018 Rev V 0120 33 Saber Way, Ward Hill, MA 01835 | spruce.com
1.0 MOUNTING
The Spruce RB Series fans may be mounted at any angle without affecting performance although the vertical
mounting position shown in Fig. 1 is highly recommended. If the vertical mounting position is not possible, care
should be taken to avoid creating a low spot in the fan/duct system where condensation might accumulate in the
fan housing as shown in Fig. 2. In situations where horizontal mounting is desired and condensation is likely to
occur (bathroom ventilation in cold climates) this problem might be avoided by mounting the fan 30 degrees beyond
horizontal as shown in Fig. 3.
2.0 FAN SEALING
RB Series Fans are factory sealed, no additional caulk or other materials are required to inhibit air leakage.
3.0 DUCTING
Any type of ducting is acceptable, however, exible nonmetallic ducting is recommended for easy installation and
quieter operation. Insulated exible ducting is highly recommended in cold climates to prevent the warm bathroom air
from forming condensation in the ducting where it is exposed to colder attic air. The outlet of the fan should always
be ducted to the outside. Avoid venting the outlet of the fan directly into an attic area. The excess moisture from the
bathroom can cause damage to building structure and any items stored in the attic. Multiple venting points may be
connected together using a T or Y tting. Ideally duct should be arranged such that equal duct lengths are used
between intake and T or Y tting, this will result in equal ow rates in each intake branch. If adjustable intake
grilles are used on multi-intake systems, then the opening on each grill should be equal in order to minimize noise
and resistance. Straight smooth runs of rigid metal ducting will present the least resistance and maximize system
performance. The Equivalent Length of Rigid Metal Ducting resulting in .2” WC pressure loss for each fan model is
provided in the specication section of these instructions. Flexible ducting, if used, must always be as close to being
fully extended as possible. Formed rigid metal duct elbows will present the least resistance and maximize system
performance, recommended bend radius of elbow is at least 1.5 x duct diameter.
To ensure quiet operation of our inline and remote fans, each fan shall be installed using sound attenuation
techniques appropriate for the installation. For bathroom and general ventilation applications, at least 8 feet of
insulated exible duct shall be installed between the exhaust or supply grille(s) and the fan. RB Series fans are not
suitable for kitchen range hood remote ventilation applications. The ducting from this fan to the outside of the building
has a strong effect on the airow, noise and energy use of the fan. Use the shortest, straightest duct routing possible
for best performance, and avoid installing the fan with smaller ducts than recommended. Insulation around the ducts
can reduce energy loss and inhibit mold growth. Fans installed with existing ducts may not achieve their rated airow.
Fan Installation & Operating Instructions
Fan Series
RB110 p/n 28128
RB190 p/n 28578
RB275 p/n 28115
RB300 p/n 28088
RB350 p/n 28261
RB400 p/n 28206
RB500 p/n 28207