Got an HVAC quote? Get a free second opinion from a contractor who fabricates duct in Brooklyn.

Vinco Mechanical is an NYC HVAC contractor based in Brooklyn with an integrated sheet metal fabrication shop ( Metal Men Mechanical) at the same 993 Grand Street address. Founded 1987. Mitsubishi Diamond Elite and Daikin Comfort Pro certified. We offer free second opinions on HVAC quotes from any NYC contractor — upload yours, get a same-business-day reply from a licensed tech.

Stock duct vs fab duct is where the margin lives.

Stock ductwork from a sheet metal supply house carries a 20-30% supplier markup, plus on-site labor to cut and modify each piece to fit. The contractor passes that markup, plus the labor hours, into your line item.

Custom-fabricated ductwork is cut to spec on a plasma table from the design drawings, labeled by run, pre-sized, and delivered ready to hang. Margin is captured upstream at the fab shop, not in the field.

When you ask whether your duct line item is reasonable, the answer depends on which side of that fence the bidder lives on. We live on the fab side, so we know.

Three steps. Same business day.

1. 01

   Upload

   Send the quote as a PDF or photo via the form below. Add a one-line note about the project (3-zone Mitsubishi for a Brooklyn brownstone, RTU replacement on a Long Island City warehouse, whatever fits). Optional: address and zip so the tech can sanity-check the building type.

2. 02

   Licensed Vinco tech reviews

   A licensed Vinco tech reads the quote (NOT AI alone — every second opinion is human-reviewed per Vinco's customer-comms policy). The tech checks sizing math, brand authorization, refrigerant choice, permits and DOB filings, ductwork stock-vs-fab, board-package items, and the seven things that hide in 'by others' lines.

3. 03

   Same business day reply

   You get an email back the same business day with a verdict (fair / high / low), a list of what's missing, and a fair NYC range for the work as scoped. No obligation, no upsell, no follow-up sales calls. If you'd like Vinco's number on the same scope, ask and we'll book a free estimate visit.

The seven items most NYC quotes get wrong.

Pricing comparison alone won't catch a missing line item. We read every quote against this checklist and tell you what's there, what's missing, and what's reasonable for the NYC market.

• 01

  Equipment sizing vs square footage

  Manual J load calculation should drive tonnage. A 5-ton condenser on a 1,400 sq ft brownstone is oversized; a 2-ton on a 2,800 sq ft loft is undersized. Both fail in the field — short-cycling and humidity issues for oversized, can't-keep-up calls in July for undersized. We check the math.

• 02

  Brand authorization (Diamond Elite / Comfort Pro)

  If the quote is a Mitsubishi install, the contractor should be on the Mitsubishi Comfort dealer locator at Diamond or Diamond Elite tier. Daikin installs the same on the Daikin Comfort locator at Comfort Pro. Non-authorized installs void the extended manufacturer warranty.

• 03

  NYC DOB permits — included or 'by others'?

  Most NYC HVAC work needs a DOB filing (Alt-2 or limited alteration). 'Permits by others' on a quote means the homeowner is on the hook for filing, fees, expediter costs, and any DOB violations. The Vinco-vs-quote difference often lives here.

• 04

  Ductwork — stock or custom-fab?

  Stock duct from a supplier carries a 20-30% markup and needs on-site cut and modify labor. Custom-fab duct (like our sister company Metal Men Mechanical makes in-house) is labeled, pre-sized, and ready to install. The line-item delta on duct-heavy jobs is usually meaningful.

• 05

  Refrigerant — R-22, R-410A, or R-454B?

  R-22 is EPA-banned for production since 2020. R-410A is in A2L phaseout (production cap 2025, full phase-out by 2036). R-454B is the canonical 2026+ refrigerant for new installs. A new install on R-410A in 2026 is a five-year clock — we flag it.

• 06

  Co-op or board package prep

  If the building is a co-op or condo, the install needs an alteration agreement, a COI naming the building as additional insured, an engineer letter on noise and vibration, and often a building-engineer sign-off. 'Board package by others' on the quote shifts that work to the homeowner.

• 07

  Firestopping, electrical, condensate — in scope or 'by others'?

  Penetrations through fire-rated assemblies need UL-listed firestopping (DOB inspection item). New equipment usually needs a dedicated 240V circuit. Condensate needs a gravity drain or a pump with a float switch. All three are commonly hidden in 'by others' lines.

Refrigerant context: see the A2L phaseout decision page for the 2025-2036 EPA timeline.

Fair-market ranges for the most-quoted NYC jobs.

These ranges reflect labeled, fully-permitted, code-compliant installs by a licensed NYC contractor with manufacturer authorization. Sub-permit, non-authorized, or duct-by-others quotes commonly run 20-40% lower upfront — and 2-3x higher over a five-year window once warranty gaps and re-work surface.

• Single-zone mini-split (Mitsubishi or Daikin)

  Fair NYC range: $4,000 — $7,500 installed, including line set, electrical, and DOB filing. Sub-$3,500 typically signals stock-only duct, no permit, or non-authorized installer.

• 3-zone mini-split (single condenser, 3 heads)

  Fair NYC range: $14,000 — $22,000 installed, depending on line-set routing complexity, brand, and unit capacity. Brownstone retrofits run higher due to chase work and concealed line hide.

• Multi-floor VRF / VRV (Mitsubishi City Multi or Daikin VRV)

  Fair NYC range: $35,000 — $90,000+ for a 3-5 floor commercial install, depending on tonnage, branch box count, controls integration, and permit complexity. Class A office work with BMS integration runs at the high end.

• Central air replacement (existing ducts)

  Fair NYC range: $9,000 — $16,000 for like-for-like central AC replacement using existing ductwork. Higher if ducts need rework or if the building is on a co-op alteration agreement.

• Gas boiler replacement

  Fair NYC range: $8,500 — $14,000 for residential gas boiler replacement (Weil-McLain, Burnham, similar). Steam-to-hydronic conversion runs $20,000+. NYC DOB and DEP filings included.

See full labor rates and financing options on /rates-and-financing.