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Establishes minimum regulations for mechanical systems using prescriptive and performance-related provisions. The IMC was developed with broad-based principles that make possible the use of new materials, methods and design. Important changes in the 2021 IMC include: Clothes dryer exhaust terminals required to be at least 3 feet from any opening into a building. Polyurethane spray-applied foam on the exterior of ducts in attics and crawl spaces required to meet specific smoke and flame index limits. Fire and smoke dampers must be provided with approved access for inspection and maintenance. Refrigerant tables updated to include new refrigerants. Addition of condensate termination identification markings and discharge restrictions. Approved factory-built combination intake/exhaust terminations permitted, relaxing separation requirement. 30% reduction in minimum mechanical ventilation for whole-house balanced ventilation systems. Continuous operation requirement for manicure and pedicure station exhaust systems. Grease duct horizontal cleanout required within 3 feet of a horizontal discharge fan.
Shipping & Returns Policy
Effective Date: November 21, 2024
At Codebook Library, we are committed to delivering your books safely, efficiently, and on time. Please review our shipping and returns policy below to understand how orders are processed and handled.
Shipping Policy
Shipping Coverage
Currently, Codebook Library ships orders within the United States only. We do not offer international shipping at this time.
Processing Time
Orders are typically processed within 1–2 business days after payment confirmation, excluding weekends and public holidays.
Delivery Timeframes
- Standard Shipping: Estimated delivery within 5–7 business days from the date of shipment
- Express Shipping: Estimated delivery within 3–5 business days from the date of shipment
Delivery times may vary based on location, carrier delays, or unforeseen circumstances.
Shipping Charges
Shipping fees are calculated at checkout and are based on:
- Selected shipping method
- Order weight and size
- Destination address
All applicable shipping costs will be displayed before order confirmation.
Shipping Restrictions
We reserve the right to:
- Restrict shipping to certain U.S. locations if required
- Refuse or cancel orders where shipping is not feasible
Returns & Exchanges Policy
We want you to be satisfied with your purchase from Codebook Library. If you receive a damaged or incorrect item, we accept eligible returns under the conditions outlined below.
Return Eligibility
- Returns must be requested within 15 days of delivery
- Items must be damaged or incorrectly shipped
- Books must be returned in their original condition, including packaging
⚠️ Correctly delivered books that do not meet expectations due to used condition are not eligible for return.
Return Process
- Contact us at support@codebooklibrary.com within 15 days of receiving your order
- Include your order number, description of the issue, and clear photos (if applicable)
- Once approved, return instructions will be provided
- A prepaid return shipping label will be issued only if the return is due to our error
Refunds
- Refunds are issued to the original payment method
- Processing begins after the returned item is received and inspected
- Please allow up to 7 business days for the refund to reflect in your account
Shipping fees are non-refundable unless the return is due to an error on our part.
Non-Returnable Items
The following items are not eligible for return or refund:
- Used books that are not damaged or incorrectly shipped
- Digital products or downloadable content (if applicable)
- Items returned without prior approval
Disclaimer
Codebook Library does not sell medical or healthcare products, including pharmaceuticals, medical devices, or equipment.
Our website exclusively offers professional, technical, educational, and reference books, including industry codebooks and manuals.
