HVAC Duct Reference Card
Plastic card for HVAC techs - featuring: supply flex and metal duct CFM chart, return grill sizing totals by square inches, and return duct sizing per ton. Fits in wallet like a standard credit card. Made of plastic so it will not break down with sweat or in heat.
Quality Guarantee & Returns
- Quality is guaranteed. If there is a print error or visible quality issue, we'll replace or refund it.
- Because the products are made to order, we do not accept general returns or sizing-related returns.