HVAC Load Calculator Manual Jv1.11.2 / 1.11.2 (77)

What changed

• UXFixed sizing calculation to prevent equipment oversizing in mild climates.
• UXUpdated floor insulation logic for homes over unconditioned basements.
• ContentExpanded climate data coverage for more ZIP codes.
• New featureImplemented climate-aware humidity checks.
• New featureAdded realistic balance point and backup heat logic for cold-climate heat pumps.
• ContentAdded new design temperatures and equipment range options.
• New featureAdded 'How We Calculate' documentation in Settings.

Original release notes

More accurate sizing: fixed a calculation that could oversize equipment, especially in mild climates — results may be lower, closer to a true Manual J. Re-run saved projects to update.
• Floor insulation now affects homes over an unconditioned basement.
• Better climate data for more ZIP codes.
• Humidity check is now climate-aware.
• Cold-climate heat pumps: realistic balance point + backup heat.
• New design temps, equipment range & "How We Calculate" in Settings.