Homeowner mode for designing heat pump system. Performance & Analysis Improvements Improved heating and cooling calculations. Updated domestic hot water sizing and planning tools. Expanded supported equipment data and comparisons. Refined reports and export output.

New in 1.5.3 • Comfort Performance Dashboard — See year-round comfort and efficiency from two years of local weather. Systems with multiple outdoor units now show one section per zone, each measured against the rooms it actually serves. • Cooling Cost Comparison — Compare cooling-season operating costs across SEER2 ratings for Mitsubishi and custom ducted units, side by side. • Air-to-Water Heat Pump Sizer — Size Viessmann Vitocal 100-AW monobloc systems alongside Ecodan, with full balance-point analysis and shareable reports. • Design My System — Homeowners get an automatic indoor and outdoor unit recommendation, grouped into single- and multi-zone systems from a guided wizard. Plus refinements and fixes throughout, including clearer equipment naming in cost comparisons.

METUS indoor units fix Added skylights for heatloss & heat gain more bug fixes Come across any bugs or improvement ideas? Email support@scanplanhvac.com ****Duct sizer not fully working as of yet

version: 1.5.1 date: 2026-07-26 title: Performance & Analysis Improvements notes: - Improved heating and cooling calculations. - Updated domestic hot water sizing and planning tools. - Improved gas piping sizing guidance. - Expanded supported equipment data and comparisons. - Refined reports and export output.

• Renamed to ScanPlan: HVAC Load & Ducts — clearer name, same powerful tool • AI Technical Assistant for Ecodan and METUS tech docs • AR duct measurement • Gas piping sizer (LP + NG, longest-length method) • Unico high-velocity system reports

Traditional Duct sizing Heat pump Defrost penalty updated to METUS application note 1041

- Fixed bug where changing indoor cooling temperature was not working - Now able to change from window to door and door to window

Export project PDFs

Version 1.4.7 ROI & Payback Analysis Enter a quoted installation cost and see your payback period, lifetime ROI, and a month-by-month savings breakdown — factoring in rebates, tax credits, financing, and maintenance savings. AI Material Capture Photograph existing equipment and materials on the job site. AI identifies and logs them with specs directly into your project, ready to review and export. AI Floor Plan Import Import floor plans from photos or PDFs. AI automatically detects rooms and dimensions to jump-start your load calculation. Equipment Schedule View a full equipment schedule for any project — all selected units, specs, and placements in one place. Multi-Project Export Export data across multiple projects at once for batch reporting and handoffs. Historical Weather Backfill Automatically fill in missing heating and cooling degree day data using NOAA historical climate records for your project address. Domestic Hot Water Sizing Size and compare DHW systems with full energy cost analysis and heat pump water heater comparisons. General improvements and stability fixes.

Viessmann Air to water sizer

Air to water heatpump sizer Bug fixes

Unico high velocity duct sizing

ManualJCalculator: extract PsychrometricHelper, OccupancyLoadCalculator, LatentLoadCalculator, and InternalGainsCalculator as reusable module-level types. Add OccupancyMode enum (residentialAuto, residentialCustom, commercialAssembly) with ASHRAE commercial activity presets. Ventilation latent now calculated via 0.68 × CFM × ΔGrains when ventilationCFM > 0 instead of hardcoded zero. Add per-room occupant count override UI in HVACLoadAnalysisView cooling tab. Add ManualJLatentTests covering all latent formulas, occupancy modes, and SHR edge cases. Also includes AI FloorPlanImportService and FloorPlanImportView for PDF/image floor plan import flow.

Bug Fix for export project backup

New: Heat Pump Sizer Domestic Hot water cost estimator

Manual Entry of information for devices without LIDAR Support for IPAD

manual entry of rooms, heating btus floor plan editing weather backfill Btu calculator and PDF export

What's New Fuel Prices & Utility Bills Enter your client's actual utility bills once and every comparison in the app uses the same numbers. Supports electricity, natural gas, heating oil, and propane. Add bills from multiple months and the app calculates a volume-weighted average unit price — so a heavy January gas bill counts more than a light July bill, giving you a more accurate annual rate. Real-Time EIA Pricing Connect a free EIA API key (eia.gov/opendata) to pull current residential fuel prices for your project's state directly from the U.S. Energy Information Administration. Prices update on demand and show the source and period, so you always know how current the numbers are. DHW Annual Operating Cost Comparison The domestic hot water comparison screen now shows estimated annual operating costs for every system — gas tank, electric tank, tankless, heat pump, and indirect. Systems are ranked cheapest to most expensive so you can have a clear cost conversation with your client.

Fixed Bug where promo codes were not working

Interface & Analysis Refinements Improved public-facing release notes presentation. Refined heat pump sizing display in energy cost comparison. General stability and workflow improvements. This app now uses a 7-day app-controlled free trial followed by a one-time non-consumable in-app purchase for lifetime access. There are no auto-renewable subscriptions and no automatic billing. After the trial ends, users can unlock full access with a one-time purchase.

• New: Export All Floor Plans • Generate a single, shareable PDF containing every room’s floor plan for the project. • Progress indicator and PDF preview for a smoother export experience. • Improved: HVAC Load Analysis • Clearer project summaries for heating and cooling, including airflow targets and recommended capacities. • Enhanced room-by-room breakdowns with sensible/latent loads, SHR, and percentage contributions. • Better Scanning Experience • Smart LiDAR support check prevents blank screens on unsupported devices. • Streamlined flow for scanning new rooms and reviewing results. • Energy & Weather Tools • Weather Backfill Analysis now uses your project’s setpoints for more accurate insights. • Energy Cost Comparison refinement for clearer results and easier decision-making. • Reports & Sharing • HVAC Report export now previews instantly and uses improved formatting for clarity. • Updated file naming for PDFs to keep your documents organized. • General • UI polish, performance improvements, and minor bug fixes.

CFMs on Floorplan exports Real heat pump curve data with defrost penalty

CURRENT ISSUE The screen allows selecting a system such as “LP 2 PSI System” even when there is no matching chart loaded in SampleGasSizingCharts.json. This causes the UI to show “No chart available for this configuration.” CURRENT KNOWN DATA The current sample charts only support propane second-stage low-pressure charts (for example 11" WC), not LP 2 PSI charts. GOAL Make the UI and view model smarter so unsupported configurations are handled gracefully and the user is guided toward valid chart-backed selections. REQUIREMENTS 1. Detect available configurations from the loaded charts - Use the loaded GasSizingChart data as the source of truth - Determine which fuel types, system types, and materials are actually available 2. Prevent invalid selections where possible - If a selected system has no matching charts for the current fuel type, either: a) disable that picker option, or b) automatically switch to the first valid available option - Prefer the least disruptive UX, but do not leave the screen in a dead-end state if a valid option exists 3. Improve the missing-chart message Replace the generic message with something more useful, for example: - “No LP 2 PSI chart has been loaded yet.” - “Available systems for Propane (LP): Second Stage Low Pressure” The exact text can vary, but it should clearly explain why there is no chart and what is available instead 4. Add fallback behavior on screen load - When GasPipingSizerView first loads, automatically pick a valid chart-backed configuration if one exists - Avoid defaulting to unsupported system types when the sample chart library does not contain them 5. Keep the architecture clean - Put chart availability / filtering logic in the view model, not the view - Do not hardcode assumptions outside the loaded chart metadata - Keep the design expandable for future support of LP 2 PSI, natural gas, and additional materials 6. Maintain current functionality - Do not break current sizing behavior - Do not change the deterministic chart-driven sizing engine - Do not refactor unrelated UI NICE TO HAVE - If practical, expose computed collections like: - availableFuelTypes - availableSystemTypes(for fuel:) - availableMaterials(for fuel:system:) - If the selected material becomes invalid after system/fuel changes, automatically update it to a valid material - If there is exactly one valid chart after filtering, auto-select it FILES LIKELY TO UPDATE - ViewModels/GasSizingViewModel.swift - Views/GasPipingSizerView.swift - Possibly any related picker/helper code DELIVERABLE Update the existing implementation so the Gas Pipe Sizer always defaults to a valid chart-backed configuration when available, avoids dead-end unsupported selections, and provides a clearer explanation when no matching chart exists.

New in this version: • Added Energy Analysis to compare seasonal heating costs across system types. • Added weather-based backfill calculations using historical weather data. • Added Weather Connect API support for improved weather-driven analysis. • Added propane fuel cost input for more accurate cost comparisons. • Improved iPhone layout and readability in Energy Analysis tables. • Updated privacy details for weather data usage.

- Refine boiler and DHW sizing flow and comparison integration - Add DHW comparison info button and help sheet content