Home Systems

Calculate attic ventilation NFA from floor area, 1:150 or 1:300 rules, intake/exhaust split, vent product ratings, and existing deficits.

Size a bathroom exhaust fan from room area, fixture load, ceiling height, moisture use, duct limits, fan rating, sound target, and timer guidance.

Choose a ceiling fan size from room area, ceiling height, airflow need, and location rating, then check blade span, clearance, downrod, and run cost.

Size a dehumidifier from room area, humidity, dampness, temperature, moisture sources, drainage, runtime, and energy-cost assumptions.

Size an EV charger circuit from output current, supply type, breaker choice, panel headroom, conductor material, and voltage-drop target.

Check NEC-style box fill by converting conductors, grounds, devices, clamps, support fittings, and terminal blocks into cubic-inch allowances.

Calculate residential panel demand from dwelling area, appliances, HVAC, EV charging, and custom loads with service headroom checks.

Estimate French drain stone, pipe, fabric, slope fall, outlet checks, and material cost from trench measurements before ordering supplies.

Size a generator from running and starting watt loads, then compare surge method, derating, reserve, voltage, and priority warnings.

Estimate heat pump savings from current fuel use, COP or HSPF2, utility prices, installed cost, incentives, payback, and break-even checks.

Estimate home EV charger install cost from circuit size, wire run, panel work, labor, permits, tax, contingency, rebates, and quote checks.

Calculate range hood CFM from width, BTU output, kitchen volume, duct size, and makeup-air rules, with rating fit and duct checks.

Estimate rooftop solar panel fit from roof size, setbacks, obstructions, panel dimensions, orientation, losses, annual kWh, target size, and cost.

Size a solar panel array from monthly kWh, target offset, peak sun hours, panel watts, system losses, and roof-area fit checks.

Model a solar payback period from installed cost, incentives, production, utility rates, export credits, degradation, and annual cash flow.

Size a sump pump from basin inflow, lift, pipe route, safety margin, pump-curve checks, GPM at total dynamic head, and cycle volume.

Size a storage or tankless water heater from peak-hour use, fixture flow, temperature rise, reserve, and BTU or kW fit checks.

Size a residential water softener from tested hardness, iron, water use, reserve, salt dose, regeneration interval, and peak-flow demand.

Size a residential well pump from flow, pumping water level, pressure head, friction, yield, and tank drawdown, then compare TDH against pump classes.

Size a whole-house water filter from peak fixture flow, pressure drop, water loading, service-flow headroom, and cartridge replacement timing.