Home Projects Engineering

Builds two transparent parallel heat-flow paths from a complete layer schedule, reports cavity, framing, and whole-wall thermal resistance, and optionally screens a degree-day retrofit payback.

Builds a fixed split-phase circuit schedule, separates continuous and noncontinuous current, applies a transparent 125 percent planning multiplier, routes each load to the correct panel leg, and reports the binding spare-capacity result.

Calculates waste-adjusted concrete volume for mixed slab, strip, pad, and circular elements, compares bag and ready-mix logistics, and estimates a user-specified rebar, mesh, or entered reinforcement quantity.

Calculates interior and exterior dew points with the Magnus relation, maps a steady-state temperature gradient through a complete assembly, and identifies the evaluated interface with the smallest dew-point margin.

Routes EVSE current from nameplate, restricted commissioning, or desired AC power; separates branch sizing from listed load-management allocation; derives conductor resistance from AWG geometry; checks voltage drop and panel legs; and estimates charging time with an optional high-SOC taper segment.

Routes Rational or direct inflow through eight full-pipe Manning candidates and exposes capacity, velocity, trench, gravel, and cost trade-offs.

Computes real and apparent running load, unrolls six motor-start groups, compares manual, priority-shed, automatic, and listed-EMS routes, checks split-phase leg loading and a site-derated generator candidate, and interpolates an editable manufacturer fuel curve.

Routes direct or sectioned roof area through Rational runoff, Manning gutter capacity, and independent outlet-capacity and spacing counts.

Combines eight irrigation groups into a simultaneous zone and audits flow, Hazen losses, pressure margins, precipitation matching, target depth, and cycle-and-soak schedule.

Derives AWG cross-section and temperature-adjusted conductor resistance, evaluates single-phase, balanced three-phase, or DC runs, and computes every editable conductor candidate against ampacity, running-drop, starting-drop, and cost criteria.

Runs a twelve-month storage balance across one entered tank or a fixed 21-capacity ladder and exposes reliability, overflow, reserve, and simple economics.

Builds a room-level steady-state heating and cooling load from envelope UA, outdoor airflow, solar, sensible, and latent gains, then screens user-entered equipment candidates against the active capacity targets.

Screens annual-energy, backup-with-recharge, or combined solar-plus-storage requirements against eight editable packages and exposes energy flow, power gates, first-year value, and discounted payback.

Intersects eight auditable generic pump curves with a routed discharge-system curve, then screens flow reserve, velocity, and optional cycling.

Calculates a whole-dwelling outdoor-air target from editable area and room rates, an entered target, or a CO2 mass balance, then checks installed airflow and a complete local-exhaust schedule.

Screens eight valve or pump events with routed velocity, elastic or entered wave speed, critical closure time, and Joukowsky pressure change.

Compares connected-load, separated-new-load, and metered maximum-demand routes for a before-and-after home electrification project while preserving an auditable twelve-row appliance and equipment inventory.

Compares user-entered window U-factors, solar-gain coefficients, and installed costs across heating, cooling, or combined scopes, then selects by annual energy cost, positive payback, or peak load.