MRCOOL® 35 ft R-454B No-Vac Quick Connect Line Set – 3/8" x 3/4"

Installation requirements vary by product type. Selected complete MRCOOL® DIY systems are designed for homeowner installation when fitted in line with the manufacturer’s instructions, local codes and permit requirements.

Central HVAC systems, including Universal®, VersaPro®, Central Ducted Hyper Heat and packaged systems, are intended for professional installation by a qualified HVAC contractor. Licensed electrical work may also be required.

Components, thermostats, controls, line sets and accessories should be installed according to their product documentation and compatibility requirements. Always review the product page, manufacturer guidance and warranty conditions before installation.

Additional requirements vary by product and installation. Tools, electrical materials, mounting hardware, connecting components or other installation supplies may be required unless specifically stated as included.

Review the product description, specifications, installation information and What’s Included section, where available, before ordering.

Available specifications, installation instructions, owner’s manuals and manufacturer documents are provided on the product page where applicable.

Some simple accessories may not have a separate installation manual. Contact our team if you need help locating documentation for a particular product or model.

Review the product type, model number, dimensions, voltage, capacity, refrigerant type, connection sizes and compatibility information shown on the product page, where applicable.

Components, thermostats, controls and accessories must be matched to compatible equipment. Contact our team before ordering if you are uncertain about compatibility.

Confirm the product name and model number, together with any relevant dimensions, voltage, capacity, refrigerant type, connections and installation requirements.

For replacement components and accessories, compare the product specifications with your existing equipment and the relevant manufacturer documentation before placing your order.

The supplied items are listed in the What’s Included section or product description, where applicable. Only the products, components and accessories specifically stated are included.

Electrical materials, mounting equipment, connecting components or other installation supplies may need to be purchased separately unless expressly stated otherwise.

Warranty coverage varies by product and model. Eligible MRCOOL® products are covered according to the manufacturer’s warranty terms, registration requirements and installation conditions.

Accessories and individual components may have different coverage. Cool Heat Direct can provide available warranty documentation and general guidance, while warranty eligibility and claim decisions are determined by the manufacturer.

Email support@coolheatdirect.com with the product name or model number and details about your project or existing equipment.

For compatibility questions, include the model numbers of any products you intend to connect, control, replace or use together.

Support hours: Monday–Friday, 9 AM–6 PM ET.

Free standard shipping is available on eligible orders to the Lower 48 states and Washington, D.C.

Orders are generally processed within 3–5 business days, followed by approximately 5–12 business days in transit. Delivery timing varies by product availability, destination and carrier scheduling.

Smaller products may ship by parcel carrier. Larger equipment may be delivered curbside by freight carrier. The carrier may contact you to arrange a delivery appointment.

Return requests may be submitted within 30 calendar days of delivery. Products must be new, unused and uninstalled and, where applicable, unpowered. They must also be complete and in their original manufacturer packaging. Prior written authorization is required.

For approved change-of-mind returns, incorrect sizing or customer ordering errors, the customer is responsible for return freight and a 15% restocking fee applies.

Verified damaged, defective, incorrect or incomplete orders are handled separately under our full policy.