Full HVAC System Replacement Estimate
A whole-system changeout is a sum of parts. Enter the equipment, labor, ductwork and permit lines from your own written estimate and this worksheet totals them — so you can sanity-check a bid without handing your details to a lead-gen form.
Calculator
Your line items add up to $8,500.00 for the full system. Use it to sanity-check a written quote — this is a worksheet of your numbers, not a price list.
Replacing a full heating and cooling system is bigger than swapping a condenser: it can involve the outdoor unit, the indoor coil or air handler, a furnace, the duct system, controls, electrical work and the paperwork to make it legal. When a contractor hands you a single lump sum it is hard to tell whether the price is reasonable or where the money is going. This worksheet breaks the job into the four lines that matter and adds them back up — using only the figures on your estimate.
Because every number is yours, the result is exactly as accurate as your quote and never depends on a price database we would have to maintain. Ask each contractor to itemize equipment, labor, ductwork and permits the same way, then drop those numbers in to compare bids apples-to-apples.
Formula
The estimate is the sum of your four line items:
total = equipment + labor + ductwork + permits
Each term is a dollar figure you take straight from your written quote. Leave ductwork or permits at zero if they are folded into another line — the total simply reflects what you entered. No rate, markup or regional average is assumed anywhere.
Worked example
Say a quote lists $6,000 of equipment, $2,500 of labor, no separate ductwork, and no separate permit line:
total = $6,000 + $2,500 + $0 + $0 = $8,500
The worksheet returns $8,500. If a second contractor quotes $5,800 equipment, $3,000 labor, $900 of duct repairs and a $300 permit, that is $10,000 — more expensive, but it is also doing more work (the duct repairs). Seeing the lines side by side is what lets you judge whether the difference is scope or margin.
Reading a whole-system bid
Watch for scope gaps between quotes. One bid may include a full duct replacement while another quietly reuses leaky ducts; one may include a new thermostat, electrical whip, condensate pump and haul-away while another itemizes them as extras. Fold every separate charge into the right field so the totals compare fairly. A low headline number that skips ductwork or the permit is not actually cheaper — it just moves the cost to later.
This tool produces a planning estimate, not a bid. Gas furnaces must be installed and serviced by a licensed professional — improper work risks fire and carbon-monoxide poisoning, so install CO alarms — and any refrigerant procedure requires an EPA Section 608 certified technician. Right-size the equipment with a professional Manual J load calculation before you commit; the worksheet only totals the dollars you provide.