Our site works best with Javascript enabled.
New Website Design Coming Soon
Take a Look

AMERICA'S HEATING & COOLING STORE.™
Need Help? Call
800-865-5931
MON-FRI 8:30am-5:00pm Central
Aprilaire 4851
Aprilaire 4851
Blower Relay

Your Price:
$25.99
Compare to:$34.99
You save:$9.00
See Shipping Cost
Includes:
Services:

For Aprilaire series 500, 600, and 700 humidifiers that use the Automatic Digital Humidifier Controls (#56 and #58). This device will initiate HVAC fan operation when there is a call for humidity, even when there is no heat call. Use this relay in applications where humidifier operation is required beyond a call for heat, e.g. when installed on a heat pump or during times of the year where there is a need for humidity but not a need for heat.

Note: Aprilaire recommends that a humidifer is plumbed to hot water when using this relay.

Instructions & Brochures

Aprilaire 4851 Wiring Recommendation (pdf, 120 KB)
Your Order
Ways to Order
See Order Status
Returns
Modify or Cancel Order
Missing Order Item
Damaged Shipments
Warranty Claims
Quotes
View Quotes
Request Custom Equipment
Technical Support
Learning Center
Instruction Manuals
Contact Technical Support
Policies
Shipping Policy
Return Policy
Scratch-N-Dent Policy
Volume Discount Policy
Privacy Policy
Website Terms of Use
Alpine
About Us
Customer Reviews
  Phone
(800) 865-5931
Monday to Friday
8:30am - 5:00pm Central
  Mailing Address
1901 N. Clybourn Avenue
Suite 200
Chicago, IL 60614
  Email
[email protected]
or Contact Us Here
  Fax
(425) 928-2455
© Copyright 2002-2014, Alpine Home Air Products. All Rights Reserved. A Todd Arthurs Company, Inc