Home Systems

Size an air purifier from room volume and ACH, then compare label CADR, quiet-speed cushion, unit count, and coverage fit for particle removal.

Size attic ventilation from floor area, split intake and exhaust NFA, and turn product ratings into ridge, soffit, roof, or gable vent counts.

Size a bathroom exhaust fan from room size, fixtures, duct path, moisture load, candidate CFM, noise target, and timer coverage.

Choose a ceiling fan size from room area, airflow target, ceiling height, moisture rating, clearance, downrod guidance, and run-cost checks.

Size a dehumidifier for damp rooms from area, humidity, temperature, drainage, runtime, bucket handling, and energy-cost estimates.

Size an EV charger branch circuit from EVSE current, breaker choice, panel headroom, connection caps, and conductor voltage-drop checks.

Calculate NEC-style box fill from conductors, grounds, yokes, clamps, supports, and terminal blocks with cubic-inch margins and size options.

Estimate home electrical service demand in amps from floor area, appliances, HVAC, EV charging, and added loads with target headroom checks.

Estimate French drain gravel, pipe, fabric, required fall, outlet checks, and material cost from trench dimensions before ordering.

Estimate generator running and starting watts from load rows, surge timing, reserve, derating, and safety checks before choosing a size.

Estimate heat pump savings from fuel use, COP or HSPF2, utility rates, incentives, backup heat, and simple payback timing for bids.

Estimate home EV charger installation cost from circuit size, route length, panel work, labor, permits, tax, rebates, and bid scenarios.

Size a range hood from hood width, burner output, kitchen volume, duct velocity, and makeup-air limits before comparing real models.

Estimate how many rooftop solar panels fit after setbacks and keepouts, then compare DC kW, annual kWh, target size, and layout warnings.

Estimate solar panel count and DC array size from bill kWh, sun hours, losses, module watts, roof area, and inverter ratio checks.

Estimate when rooftop solar savings repay net upfront cost with incentives, export-credit rules, degradation, and annual cash-flow checks.

Size a sump pump from pit inflow, lift, pipe losses, safety margin, pump-curve capacity, and cycle warnings before choosing a model.

Size a storage or tankless water heater with peak-hour draws, fixture overlap, temperature rise, reserve, and install checks before comparing models.

Size a home water softener from hardness, iron, water use, salt dose, reserve capacity, regeneration timing, and peak-flow fit.

Size a residential well pump by flow and total dynamic head, then check yield, tank drawdown, pipe velocity, and pump-curve fit.

Estimate whole-house water filter size from peak fixture flow, pressure-drop limits, source-water load, and replacement interval checks.