Continue shopping “Full Interface Module | EST-003B” has been added to your cart. Product Price Quantity Total × Humidity Transfer Duct | EST-1600 $478.00 Humidity Transfer Duct | EST-1600 quantity $478.00 × Full Interface Module | EST-003B $78.00 Full Interface Module | EST-003B quantity $78.00 Coupon: Cart Totals Cart Subtotal $556.00 Tax $33.36 Order Total $589.36 Note: Shipping and taxes are estimated and will be updated during checkout based on your billing and shipping information.