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Tjernlund 2-Fan Crawl Space Air Supply Fan, Model# CS2

Item# 25855
Tjernlund 2-Fan Crawl Space Air Supply Fan, Model# CS2

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Tjernlund 2-Fan Crawl Space Air Supply Fan, Model# CS2

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$219.99

  • Shipping: 

    Factory shipped

  • Store Pickup: 

    Not available - online only
  • Installs on inside or outside passive crawl space vent openings or mounts to floor joists
  • Includes paintable, heavy-duty galvanized steel mounting plate and freeze protection thermostat that opens at 40°F
  • Dual fan design delivers 220 CFM air delivery
  • Works with Tjernlund UnderAire™ crawl space ventilators, Items# 250744, 250745 and 250746 (sold separately)

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  • Description

  • Key Specs

  • Reviews

  • Q & A

  • Warranty

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Product Summary

This Tjernlund 2-Fan Crawl Space Air Supply Fan revitalizes stale air in crawl spaces with fresh outdoor air. Helps vent radon, treated wood off-gassing and odors that might otherwise migrate into living areas.

What's Included

    (1) Tjernlund Crawl Space Fan, Model# CS2

Downloads

Product Manual

Features + Benefits

  • Installs on inside or outside passive crawl space vent openings or mounts to floor joists
  • Includes paintable, heavy-duty galvanized steel mounting plate and freeze protection thermostat that opens at 40°F
  • Dual fan design delivers 220 CFM air delivery
  • Works with Tjernlund UnderAire™ crawl space ventilators, Items# 250744, 250745 and 250746 (sold separately)

Key Specs

AttributeSpecification

item#

25855

Brand

Tjernlund

Manufacturer's Warranty

1 year limited warranty

Ship Weight

6.0 LB

Air Delivery

220 cfm
AttributeSpecification

Outdoor Rated

No

Volts

120

Watts

40

Speeds (qty.)

1

Reviews

Questions & Answers

Questions

1–3 of 3 Questions  
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  1. What's the point of this if the humidity is higher outside of house than in crawlspace even though crawlspace is >55% rh?

    If the idea is to lower the crawlspace humidity </=55% why is this essential (considering it has no outdoor hygrometer) if the outdoor humidity is often >55% as well as the crawlspace also being >55% at that time? Isn't just going to blow more humid air in the crawlspace?

    1. I have a similar unit installed and manage it with HomeAssistant. One temp/humidity sensor (zigbee) crawlspace and one on the deck for outside. Using a smart plug, and HomeAssistant, I have an automation that says if the humidity is higher in the crawlspace than it is outside, turn on fan, I . Once the two are the same it cuts off. .It only runs if outside temp is over 35. and outside humidity is greater than 40, but not greater than 60 With homeAssistant you can write the automation to do whatever you want. I try to keep the humitity between 40 and 60 percent, when possible. it's not going to prevent occasional excessive humidity, but reduces the time the humidity is outside the norms, I had a dehumidifier and it seemed like more trouble/power than it was worth. No matter what, humidity will enter the crawlspace.

      Helpful?

    2. This unit is not designed to lower humidity. It is designed to bring fresh air in from outside.
      It does work with Tjernlund UnderAire crawl space ventilators which will help to lower the humidity.
      See items below.

      Helpful?

  2. what is the sound Data on this Fan?

    1 answer

    1. The Tjernlund 2-Fan Crawl Space Fan is not rated in decibels by the manufacturer.

      Helpful?

  3. diameter of fan itself

    1 answer

    1. The fans measure 4-5/8" W x 4-5/8" H.

      Helpful?

Warranty

Manufacturer's Warranty

1 year limited warranty

Extend Your Warranty Coverage with a Northern Protection Plan (NPP)

Replacement Plan — 1 Year

A Northern Protection Plan is available after adding the product to your shopping cart.

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Tjernlund 2-Fan Crawl Space Air Supply Fan, Model# CS2
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Tjernlund 2-Fan Crawl Space Air Supply Fan, Model# CS2

Item # 25855

$219.99