How accurate are the material takeoff and cost calculations?

Calculations are grounded in industry-standard engineering formulas (such as compacted density multipliers, ASTM standards, and CSI MasterFormat divisions), with customizable local material unit costs and compaction waste factors.

What waste allowance factor should be added to material orders?

For commercial and residential trade installations, standard engineering practice recommends including a 5% to 10% material waste and compaction contingency factor.

Can I export these takeoff sheets for client bidding?

Yes, you can export full itemized material schedules and bid breakdowns directly to CSV or printable takeoff summaries.

Mechanical Load & Energy Efficiency Model

HVAC Sizing & SEER2 Savings Calculator

Size your home AC or heat pump system in BTUs and Tonnage, and calculate exact kilowatt-hour savings upgrading to modern SEER2 equipment.

Home Dimensions & Climate Inputs

Total Conditioned Square Footage (sq ft)

Climate Zone / Insulation Grade

Current System SEER Rating

New System SEER2 Rating

Electricity Rate ($ / kWh)

Annual Cooling Hours (approx.)

Equipment Sizing & Payback

Required Cooling Load: 44,000 BTU/hr

Recommended Unit Sizing: 3.5 - 4.0 Tons

Annual Electric Bill Savings: $538 / year

10-Year Cumulative Energy Savings: $5,378

Electricity Reduction: 44.4% Less Power

Pro Sizing Rule:

1 Ton of HVAC capacity = 12,000 BTUs. Oversizing an AC unit causes short-cycling and high indoor humidity, while undersizing prevents cooling on extreme 95°F+ summer peak days.

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