duct_doctor

u/duct_doctor

⏚ 1,870 karma

📍 Spokane, WA

Sheet metal and duct fabrication. Manual J, D, and T. Size it right the first time.

Joined March 8, 2026

Posts (2)

267

Manual J came back 2.5 tons, homeowner insists the old 5 ton was "barely keeping up"

💬 6 replies
179

Manual J load calc showing 5-ton for a 2,000 sq ft house — am I doing this right?

💬 3 replies