Dual Duplex Switch Assembly · 120/277 VAC · Surface Mount with Weatherproof Box · Infratech 14-4325
What this product is for
This is a surface-mount dual duplex switch assembly for compatible Infratech dual-element radiant heaters. It is used to control each heater element independently and is supplied with a weatherproof box and cover for exposed outdoor installations.
Use for
Use for Infratech WD-Series and compatible CD-Series dual-element heaters where you need simple on/off control of each element. Commonly used on patios, restaurant terraces, covered outdoor commercial spaces, and residential outdoor living areas where a surface-mounted weather-resistant control is required.
Avoid for
Avoid using this control with single-element heaters, incompatible heater series, or applications that require variable heat control rather than staged element switching. Do not treat the weatherproof box as a substitute for proper circuit sizing, overcurrent protection, or code-compliant installation.
Best for
Best for exposed outdoor heater control points where flush mounting is not practical and where installers want straightforward half-power/full-power style operation by switching heater elements independently. This is a practical choice for service replacements and new installs using Infratech dual-element heaters.
Installed in
Typically installed on exterior walls, posts, or other accessible mounting surfaces in outdoor residential and light commercial heating applications. The overall cover size is approximately 5.5 x 5.5 x 1.25 in. (140 x 140 x 32 mm).
Why this product exists
Dual-element heaters often need a simple control method without moving to more complex custom control packages. This assembly gives electricians and contractors a straightforward way to switch each element separately, which typically provides either one element on for reduced output or both elements on for full output. Actual heat delivered depends on heater model, voltage, mounting height, wind exposure, and site conditions.
Compared with similar products
Compared with a basic single on/off switch, this dual duplex assembly gives separate control over each element on compatible dual-element heaters. Compared with flush-mount controls, this version is better suited to exposed surface installations. Compared with variable controls, it is a simpler switching solution rather than a fine-adjustment heat controller.
Specifications
- Manufacturer: Infratech
- Part number: 14-4325
- Product type: Dual duplex / stack switch assembly
- Mounting: Surface mount
- Enclosure: Weatherproof box and cover for exposed outdoor areas
- Electrical rating: 120/277 VAC
- Switch rating: 20 A maximum per switch
- Function: Independent control of each heater element
- Typical control result: approximately 50% or 100% heater output on compatible dual-element heaters
- Overall size: 5.5 x 5.5 x 1.25 in. (140 x 140 x 32 mm)
- Materials: Steel J-box, stainless steel cover, plastic switch body
- Colour/finish: Stainless steel
- Country of manufacture: USA
- Typical application: Infratech WD-Series dual-element heaters; distributor listings also reference compatible CD-Series models
Typical guidance only: control compatibility, wattage loading, and branch-circuit suitability should be confirmed against the heater nameplate, manufacturer wiring information, and local electrical code. Actual performance depends on installation conditions, layout, and voltage.
Minimum Order $20
We accept the following payment methods:

Credit Card can offer cardholders convenience, security, rewards, and the opportunity to build a healthy credit history.
Click here for Contractor Cash Account
Trade Credit is a standard financing option for contractors and construction companies to obtain supplies and keep their projects moving. We offer 30-day credit terms to trade contractors on approved applications only.
Click here for Contractor Credit Account 
(Contractor Accounts)
Standard Shipping-Free on orders over $249 in Metropolitan Areas / $499 in Rural Areas
(All Other Accounts)
Standard Shipping-Free on orders over $499
Minimum Order Is $20
Freight Surcharge Apply To Oversized/Over-Weight Items(Not Limited To):
- PVC and EMT Pipe
- Wire and Cable
- Items over 48 inches in length
Surcharges are applied to items on an individual basis regardless if the rest of the order meets prepaid levels. If a freight line appears at the time of check out it only applies to the Items carrying a surcharge and not the entire basket of goods.
Shipping Options:
- A courier can deliver to your home, office, or your job site
- Pick up at local depot near you (applies to the following locations)
Edmonton Warehouse 8135 Roper Rd Edmonton, T6E 6S4, AB
Burnaby Warehouse 5608 Goring St Burnaby, V5B 3A3, BC
Orders are typically delivered within two to eleven business days. The transit time begins the first full shipping day after your order leaves our warehouse. Please allow an additional 2-5 days for delivery to remote locations, additional fees may apply.
THE FOLLOWING APPLIES TO STANDARD SHIPPING OPTIONS
- We cannot deliver to P.O. boxes.
- A signature may be required for shipments over $500.
- No weekend delivery.
- Wire & cable, EMT or PVC conduit, tube lamps 4ft or greater, and 10ft ground rods & mast pipes have special conditions.
Standard Shipping cost on orders less than $499
Total shipping cost = "Per Shipment" cost + "Per Item" cost. The "per item" cost is listed in terms of price per pound.
Product Group | Per Shipment* | Per Item |
|---|---|---|
Boxes | $6.99 | $1.49/lb |
Conduit & Raceway | $149.99 | $2.49/lb |
Connectors & Fittings | $5.99 | $1.19/lb |
Data & Structured Home | $5.99 | $1.19/lb |
Distribution Equipment | $5.99 | $1.19/lb |
Emergency Lighting | $6.99 | $1.49/lb |
Heating & Ventilation | $6.99 | $1.49/lb |
Lighting Controls | $5.99 | $1.19/lb |
Lighting Indoor | $6.99 | $1.49/lb |
Lighting Outdoor | $6.99 | $1.49/lb |
Tools | $4.99 | $.99/lb |
Wire & Cable | $49.99 | $2.29/lb |
Wiring Devices | $5.99 | $1.19/lb |
Any combination of the above items | Highest applicable per-shipment charge | As above |
Effective Date: August, 15, 1998
At Evolt Electrical Supply, customer satisfaction is our top priority. Please review our return policy below:
Returns
Defective Items:
- If you receive a defective item, you may return it for a replacement or refund within 30 days of purchase.
- To initiate a return, please contact our customer service team with your order number and a description of the defect.
Non-Defective Items:
- We do not accept returns for non-defective items. All sales are final once the product is shipped or ordered from the manufacturer. In certain circumstances we may amend this so feel free to contact our customer service team.
Return Process
Authorization:
- Before returning any items, you must obtain a Return Merchandise Authorization (RMA) number from our customer service team. Returns without an RMA number will not be accepted.
- Backordered items can not be cancelled if the item is in transit from the manufacturer, contact us to review.
Shipping:
- Customers are responsible for the return shipping costs. We recommend using a trackable shipping service or purchasing shipping insurance.
Condition:
- Returned items must be in their original packaging and condition. Any items returned damaged due to improper packaging or misuse will not be eligible for a refund or replacement.
Refunds
- Once we receive and inspect your returned item, we will notify you of the approval or rejection of your refund.
- Approved refunds will be processed within [7] business days and a credit will automatically be applied to your original method of payment.



