Fan In A Can for Gas Systems (24V) Zoom

Fan In A Can for Gas Systems (24V)


Brand: Field Controls

Field Controls
Qty Price
/ each
$589.10 / box (2 units x $294.55)
In Stock! Ships in 24-48 Hours
(39 Available)


Product Type: Fan In A Can

Description for Field Controls CAS-4

Note: only use for Gas systems up to 280,000 BTUM

These models are designed to provide combustion air for appliances when direct connection to the burner is not possible (when the appliance is located in a confined space). According to NFPA 54 and NFPA 31, an engineered system such as a CAS-3, 4, 6 or 7 may be used to overcome the lack of air in a confined space. The CAS-3 is designed for use with oil appliances. The CAS-4 is for use with gas appliances with 24 VAC gas valve controls. The CAS-4MV is for use with 750mV power pile gas appliances. Each is designed for optimum safety and includes a proving device that won't allow the burner to engage without the Fan-in-a-Can® operating. Multiple units or additional controls are required for multiple appliance installations. Each is equipped with a two speed control for enhanced versatility.


  • Motorized Blower
  • 4" Galvanized Intake Air Hood
  • (2) Mounting Brackets to secure CAS to wall
  • (2) wire conduit connectors
  • 6" x 4" Pipe Reducer Fitting
  • 6" Orifice Ring
  • High/Low Motor Speed Switch

Fan In A Can for Gas Systems (24V)


by PowerReviews
Field ControlsFan In A Can for Gas Systems (24V)

(based on 2 reviews)

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Reviewed by 2 customers

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Reliable, fairly priced

By oldman

from bloomfield,ct

Verified Buyer



      Best Uses

        Comments about Fan In A Can for Gas Systems (24V):

        The fan was dekivered very promptly and was exactly as advertised.

        • Primary use:
        • Personal

        Fan In A Can

        By Dean

        from Ijamsville, MD

        Verified Reviewer



            Best Uses

              Comments about Fan In A Can for Gas Systems (24V):

              Works very well. The 2 speed fan and integral flow switch are great features and made it very easy to interface with my furnace and water heater.

              • Primary use:
              • Personal

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              Q&A: Ask the Questions, share answers

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              get answers from real customers and in-house experts with AnswerBox.

              1 Question | 1 Answer
              Displaying question 1
              • Fan In A Can for Gas Systems (24V)


                What can I use for a boiler bigger than 280,000 btus
                Asked on 2/20/2012 by Anonymous from orange,ct.

                1 answer

                • CUSTOMER CARE


                  The CAS-4 with the standard 4” IAH will only handle up to 300 MBH input, but if you use a 6” IAH and pipe, the unit will handle up to 450 MBH. If you need something larger than that, you would need to use either the CAS-6/6SK (up to 900 MBH) or the CAS-7/7SK (up to 1,800 MBH).

                  Answered on 3/5/2012 by PexSupply Staff from NY
              Displaying question 1

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