Infratech
Infratech Slimline SL Series Heater Single Element 240V
Infratech Slimline SL Series Heater Single Element 240V
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Infratech SL-4024 Slimline 4,000W Electric Patio Heater
Clean architectural design meets powerful outdoor comfort with the Infratech SL-4024 Slimline Electric Heater. Delivering 4,000 watts of infrared heat from an exceptionally narrow 63.5-inch housing, the SL-4024 provides comfortable radiant warmth without dominating the design of your outdoor space.
Designed for covered patios, outdoor kitchens, terraces and upscale entertaining spaces, the Slimline Series warms people and surrounding surfaces directly rather than relying on heated air. The result is quiet, clean and efficient comfort with no open flame, fuel tank or fan.
Why Choose the SL-4024?
- 4,000W infrared output — delivers 13,653 BTUs of radiant heat for comfortable outdoor living.
- Ultra-slim architectural profile — keeps the heater visually unobtrusive in finished patios, pergolas and outdoor kitchens.
- 63.5-inch heater length — provides a broad heating platform while maintaining the streamlined Slimline appearance.
- Single-element design — delivers direct radiant warmth without fans or moving parts.
- 240V electric operation — eliminates propane tanks, natural gas connections and open flames.
- Control flexibility — compatible with an Infratech On/Off control or eligible Infratech Custom Control system.
Slimline Design
The SL-Series is designed for outdoor spaces where heating performance matters without compromising the architecture. Its narrow housing and clean lines allow the heater to blend naturally into covered patios, outdoor kitchens and other finished outdoor living environments.
The SL-4024 features 304 stainless steel construction with an anodized aluminum housing. Choose the standard stainless-hue appearance or the All Black Slimline Shadow™ for darker ceilings and contemporary installations.
Control Required
Important: The SL-4024 requires a separate compatible control. A control is not included with the heater. Infratech lists the SL-4024 for use with an appropriate On/Off control or Custom Control system. The standard Input Regulator is not listed for this 4,000W model.
Recommended Value Control
As a single-element Slimline heater, the SL-4024 is best paired with Infratech's Single On/Off Switch — the manufacturer's recommended value control for C-Series and Slimline SL heaters. For app-based, smart operation, the Enhanced Timer Control (compatible with any Infratech heater series) adds a digital timer and Bond app control. An Infinite Control Regulator is also compatible with single-element heaters like this one for adjustable heat intensity.
Specifications
- Brand: Infratech
- Series: Slimline SL-Series
- Model: SL-4024
- Standard Part Number: 21-5080
- Heater Type: Single-Element Electric Infrared
- Power: 4,000 Watts
- Voltage: 240V
- Amperage: 16.7 Amps
- Heat Output: 13,653 BTUs
- Length: 63.5 Inches
- Construction: 304 Stainless Steel with Anodized Aluminum Housing
- Installation: Surface Mount
- Control: Required — Sold Separately
- Standard Appearance: Stainless Hue
- Optional Appearance: All Black Slimline Shadow™
Installation
The SL-4024 is a permanently installed 240V electric heater and should be installed by a qualified electrical professional. Heater placement, electrical requirements, mounting clearances and control configuration must follow current Infratech installation instructions and applicable local electrical and building codes.
Authorized Infratech Dealer
The Pinnacle Patio is an authorized Infratech dealer. Your heater is supplied new with applicable manufacturer warranty coverage and direct support from our family-owned business.

Ask the Owners
Ask the Owners
Questions before you order? Talk directly with Marc or Andrew.
Need help with sizing, fuel type, finishes, installation, compatibility or delivery? We're available to help before you purchase.
Call — 904-298-7284
Text — 904-298-7284
Email Marc or Andrew
Personal guidance directly from our family business.
What Happens After You Order
What Happens After You Order
Before your order is submitted, we confirm product availability and the expected lead time.
If your item requires production or special ordering, we'll communicate the estimated timeline before the order is placed.
Shipping & Delivery
Shipping & Delivery
Complimentary U.S. shipping on orders $99+.
Most larger outdoor living products ship securely on a pallet via freight carrier. Depending on the carrier, you may be contacted to schedule delivery.
Once your order ships, we'll provide tracking information and let you know what to expect for delivery day.
When your order arrives: Please inspect the shipment and packaging for visible damage. If you notice anything concerning, take photos and contact The Pinnacle Patio immediately.
Delivery times vary by product and manufacturer. Custom and built-to-order products may require additional production time.
The Pinnacle Promise
The Pinnacle Promise
Authorized Dealer
Genuine products backed by applicable manufacturer warranty protection.
Best Price Guarantee
Found a lower advertised price from an authorized dealer? Let us know and we'll work to match it whenever possible.
Personal Guidance
Direct help from Marc and Andrew with product selection, compatibility and ordering.
Premium Brands
Products selected for craftsmanship, performance and lasting value.
Father-and-Son Service
Personal support before and after your purchase.
Because Fire Was the First Luxury.
Upgrade selections may require additional pricing. Send us your selected finishes and we’ll confirm options before fulfillment.