Existing McMansion with 120/240 has 2 identical trane units, labels below. For a dwelling service load calc, I'm looking for one number (per unit). This is a little bit greek to me, as it's been a few days since I took my license exam. Not for exam purposes, but for estimating available service capacity, I'm thinking I'm good if I take the minimum circuit ampacity (18.0 x 240), round up (4.5kva), and multiply by 2 (2 units).... call it 9kva. How far off am I?