Summary: Della adds Serena Series Multi Zone discount

Why It Matters: This shows a new focus on a specific product line with a discount.

What Changed:

• "Serena Series Multi Zone — 20% Off Now" was added to the rotating banner.
• The "Sales" link in the main navigation changed from a collection page to a limited-time sale page.
• A new "Shop by Climate Range" filter was added under "Heat Pump" in the navigation.
• A new section for "Serena Series Multi Zone" products was added to the homepage.
• Several product listings on the homepage were changed, including their images, titles, prices, and review counts.
• The "Shop All" button under the main product display now links to the "Serena Series Multi Zone" collection instead of "Mini Split AC".