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.

Commercial VRF Heat Recovery & Chiller Decarb Sizer

🏢 1. Facility & Thermal Loads

Conditioned Floor Area (sq ft)

Peak Cooling Capacity (Tons)

Simultaneous Heat Recovery (%)

System Architecture

❄️ 2. Equipment Efficiency & Tariffs

Proposed VRF Efficiency (IEER)

Baseline RTU/Chiller (EER)

Blended Electric Rate ($/kWh)

Natural Gas Rate ($/Therm)

💵 3. Turnkey CapEx & Tax Deductions

Turnkey Installed Cost ($/Ton)

Electric Utility Rebate ($/Ton)

IRA Section 179D Energy Deduction ($/sq ft)

📊 4. Energy & Decarbonization Yield

20-Year Cumulative Net Present Value (NPV)

$624,300

IRR: 21.8% • Simple Payback: 4.2 Years

Annual Utility Savings

$48,600/yr

Electric: $31,200 • Gas: $17,400

Natural Gas Displaced

13,920 Therms

74.1 Metric Tons CO₂e/yr

Gross Turnkey CapEx

$512,000

160 Tons @ $3,200/Ton

IRA §179D + Utility Rebates

-$388,400

§179D: $348,400 • Rebates: $40,000

Net Capital Investment (Post-Tax Shield)

$123,600

76% of Gross Cost Offset by §179D Deductions & Utility Grants

Engineering Specification	Underwritten Value
Total VRF Indoor Fan Coil Units (FCU)	32 Units (~5 Tons/zone)
Simultaneous Heat Recovery Coincident Credit	48.0 Tons Diverted Directly
Annual Electric kWh Saved	215,172 kWh/yr
Boiler Gas Heating AFUE Improvement	80% AFUE Gas → 4.1 COP Inverter Heat Pump
20-Year Cumulative Cash Flow	$972,000