Updated 2026-09-15. Winner field: depends (this site does not rank a single winner).
Cool Calc and Wrightsoft both appear on ACCA’s approved software list for residential Manual J work, but they sell different delivery models. LoadCalcStack does not rank a winner.
Snapshot (published floors only)
| Dimension | Cool Calc | Wrightsoft RSU Residential (USA) |
|---|---|---|
| Published floor | $50/user/mo | $900/year |
| Delivery | Web browser | Windows desktop package |
| Manual J / D / S (vendor claim) | J, S, D on Pro card | Right-J (ACCA), Right-D (ACCA) listed among modules |
| Pricing page style | Public cards on homepage | Public yearly price on product page |
| ACCA list (as retrieved) | Cool Calc Manual J | Wrightsoft Right-J8 |
Published 2026-09-15. See vendor profiles for sources and anything not confirmed.
Related
- Cool Calc profile
- Wrightsoft profile
- Wrightsoft vs Elite Software (Rhvac)
- What is Manual J / ACCA-approved software
Sources
- Cool Calc homepage — retrieved 2026-09-15
- Wrightsoft RSU Residential Package — retrieved 2026-09-15
- ACCA approved software — retrieved 2026-09-15