How AI Automates Refrigeration Piping Takeoffs for Grocery and Retail Remodels
If you estimate refrigeration work for grocery stores, big-box retailers, or supermarkets, you already know the drill. A remodel plan set lands on your desk — 167 pages, five rack systems, 160 circuit rows across multiple piping schedules, case schedules with fixture types and door counts, and detail sheets calling out Unistrut P-1000 supports at 10'-0" O.C.
Your job: turn that into pipe footage by line type, insulation quantities, hanger counts, labor hours, equipment costs, and a total bid number. Manually, that's 2–3 days of work per plan set.
We built Aginera to do it in under 5 minutes.
This post walks through exactly how — the technical details, the formulas, and the real numbers from an actual big-box retail refrigeration extraction.
The Problem: Why No One Has Automated Refrigeration Takeoffs
Electrical takeoffs have had AI tools for a couple of years. Count receptacles, trace conduit, link circuits. HVAC is getting there — duct measurement, diffuser counting, equipment schedules. Plumbing has fixture counting and pipe routing.
Refrigeration? Nothing.
Here's why it's harder:
Piping schedules are dense, multi-system tables. A single page might contain three different rack systems (LTA DX, DTD TCO₂, MTC GLY), each with its own circuit rows, pipe sizes for suction/liquid/riser columns, and estimated route lengths. The text layer in the PDF is fragmented and reordered — headers appear after data rows, columns are scrambled. Traditional text search for "PIPING SCHEDULE" fails because the words might be split across different text blocks.
Every system type has a different pipe multiplier. DX and SCO₂ systems have two pipes per circuit (suction + liquid). Transcritical CO₂ (TCO₂) has three (supply + return + liquid). Glycol has two (supply + return). You can't just multiply route length by 2 — you need to know the system type for every circuit.
Derived quantities cascade. Route LF → pipe LF → insulation LF → hanger count → labor hours. Each depends on the previous. Get the route length wrong and everything downstream is wrong. Get the system type wrong and the multiplier is wrong. Get the support spacing wrong and the hanger count is off.
Half the bid items don't appear on drawings. Refrigerant reclaim, pressure testing, crane/rigging, night premiums, valve allowances, roof penetration coordination — these are standard scope for every grocery refrigeration project, but they're never drawn on a plan sheet. An experienced estimator adds them from memory. A junior estimator misses them.
How Aginera Solves It: Step by Step
Step 1: Page Classification
When you upload a refrigeration plan set, Aginera classifies every page before extracting anything. It uses content-based scoring with seven anchor patterns to identify refrigeration piping schedule pages:
| Anchor | What It Detects | Score |
|---|---|---|
| "ESTIMATED TOTAL LENGTH" | Piping schedule length column | +3 |
| LTA/MTC/DTD CONN | Rack connection identifiers | +3 |
| SYSTEM LTA DX / PIPING SCHEDULE SYSTEM | System type labels | +3 |
| PIPE SUCTION / SUCTION RISER LIQUID | Pipe column headers | +2 |
| A01 DX, 2.42A SCO2 (≥3 matches) | Circuit row patterns | +2 |
| PIPING SCHEDULE + SUCTION/LIQUID | Generic schedule headers | +2 |
A page needs a score ≥3 to qualify as a piping schedule page. This multi-anchor approach handles the fragmented PDF text order that breaks simpler keyword searches.
The same classifier identifies case schedule pages, equipment schedule pages, and demo plan sheets — each feeding different parts of the extraction.
Step 2: Circuit Row Parsing
On each identified piping schedule page, Aginera parses circuit rows from the tab-separated text. It recognizes three circuit ID formats:
- Big-box retail style:
A01 DX,B12 SCO2,D13 TCO2,C10 GLY - Sub-circuit style:
1.5A DX,2.42A SCO2 - Rack connection style:
LTA CONN:1,MTC CONN:3
For each row, the system extracts:
- Circuit ID and system type
- Estimated route length (the last plausible 1–4 digit integer in the tab-separated tokens)
- Rack assignment (tracked via schedule section headers)
From a 167-page retail plan set, this produces 160 unique circuits across 5 rack systems with a total route length of 5,887 LF.
Step 3: Pipe LF Calculation with System-Type Multipliers
This is where the domain knowledge matters. Each circuit's route length gets multiplied by the correct factor for its system type:
| System | Pipes Per Circuit | Multiplier | Logic |
|---|---|---|---|
| DX | Suction + Liquid | ×2 | Standard direct expansion |
| SCO₂ | Suction + Liquid | ×2 | Subcritical CO₂ |
| TCO₂ | Supply + Return + Liquid | ×3 | Transcritical CO₂ (3-pipe) |
| GLY | Supply + Return | ×2 | Glycol secondary |
The total pipe footage is also broken down by line type, so your bid shows the actual composition:
| Line Type | Footage | Source |
|---|---|---|
| Suction | 1,712 LF | DX systems |
| Liquid | 1,712 LF | DX systems |
| CO₂ (SCO₂ + TCO₂) | 7,548 LF | CO₂ systems ×2/×3 |
| Glycol | 2,798 LF | GLY systems ×2 |
| Total | 13,770 LF |
This breakdown matters for pricing because CO₂ piping and glycol piping have different material costs, fitting requirements, and brazing specifications than standard DX copper.
Step 4: Insulation Classification
All refrigerant lines in commercial grocery applications are insulated per energy code and equipment manufacturer specifications. Aginera classifies the full pipe LF as insulated and generates a separate insulation line item:
- Insulated pipe: 13,770 LF
- Non-insulated pipe: 0 LF (condensate drain and similar are tracked separately)
If a project has specific spec notes about non-insulated sections, those can be captured separately. The default classification assumes full insulation coverage — which is correct for 95%+ of grocery refrigeration projects.
Step 5: Hanger/Support Count
The refrigeration detail sheets on most grocery projects call out the support specification:
1-5/8" × 1-5/8" galvanized Unistrut P-1000 at 10'-0" maximum on centers
Aginera applies this spacing to the route length (not the pipe length — hangers support the route, not individual pipes):
hanger_count = ceil(route_lf / spacing) × waste_factor
hanger_count = ceil(5,887 / 10) × 1.15
hanger_count = 589 × 1.15
hanger_count = 678 EA
The 15% waste factor accounts for additional hangers at turns, risers, vertical drops, and field conditions. This matches what an experienced estimator would calculate — the ASHRAE recommendation for refrigeration piping support spacing is 8–10 ft for copper tube sizes commonly used in commercial refrigeration.
Step 6: Labor Model
Aginera derives labor hours from the material quantities using industry-standard productivity rates:
| Work Item | Quantity | Labor Factor | Hours |
|---|---|---|---|
| Refrigerant piping install | 13,770 LF | 0.18–0.30 hr/LF | 2,479–4,131 |
| Pipe insulation | 13,770 LF | 0.05–0.10 hr/LF | 689–1,377 |
| Hanger/support install | 678 EA | 0.35–0.60 hr/EA | 237–407 |
| Pressure test / startup | 1 LS | 160–300 hrs | 160–300 |
| Valves / fittings | 1 LS | 300–600 hrs | 300–600 |
| Total base labor | 3,865–6,815 |
For retail environments where work must happen during off-hours, apply the night work multiplier:
night_labor = base_labor × 1.25 to 1.50
At the mid-range estimate of 5,340 base hours × $110/hr journeyman pipefitter rate, that's approximately $587K in piping labor — a number that aligns with industry benchmarks for projects of this scope.
Step 7: Bid Intelligence
Aginera automatically adds 10 standard refrigeration scope items that every bid needs but no drawing shows. Each is classified so you know what's bid-ready and what needs your judgment:
| Item | Qty | Unit | Classification |
|---|---|---|---|
| Refrigerant recovery/reclaim | 1 | LS | Bid Item |
| Pressure test / evacuation | 1 | LS | Bid Item |
| System charge / startup | 1 | LS | Bid Item |
| Crane / rigging | 1 | LS | Bid Item |
| Night work premium | 1 | LS | Bid Item |
| Valves / fittings allowance | 1 | LS | Derived Quantity |
| Roof penetration coordination | 1 | LS | Bid Item |
| Case removal (demo) | TBD | EA | Needs Visual Verification |
| Case installation | TBD | EA | Needs Visual Verification |
| Pipe demolition | TBD | LF | Needs Visual Takeoff |
Items marked "Needs Visual" are flagged for your review — Aginera won't guess at case counts that require reconciling schedule rows against demo plan symbols.
The Result: $1.68M Estimate in Under 5 Minutes
From a 167-page retail refrigeration plan set, Aginera produced:
- 30 classified items (9 bid items, 7 derived quantities, 5 visual verification, 9 metadata)
- 13,770 LF pipe with line-type breakdown
- 13,770 LF insulation
- 678 EA hangers
- 5,340 hrs base labor
- $1.68M total estimate
The independent benchmark for this project was $1.65M–$2.05M. Aginera landed at the low end of the range — conservative but competitive.
The LLM quality judge scored the estimate 65/100, with the highest marks on structure (17/20) and the primary gaps in display case counts (which correctly require visual verification) and equipment detail (which requires plan-to-schedule reconciliation).
What Makes This Different from Other Takeoff Tools
QuoteSoft handles ammonia refrigeration with pre-built valve assemblies — great for industrial cold storage, but it doesn't read piping schedules from PDFs or derive quantities from circuit rows.
ScopeTakeoff measures refrigerant piping by linear foot with pipe size selection — but it's a manual point-and-click tool, not an automated schedule parser.
Beam AI and Exayard focus on HVAC ductwork and general mechanical — they don't touch refrigeration piping schedules, system-type multipliers, or grocery-specific scope items.
Aginera is the first tool that reads the actual piping schedule tables from your refrigeration drawings, applies the correct per-system multipliers, and generates a complete set of derived quantities — pipe, insulation, hangers, and labor — without manual input.
Who This Is For
- Refrigeration contractors bidding grocery store and big-box retail remodels
- Mechanical/HVAC-R contractors who handle both HVAC and refrigeration scope
- General contractors who need to validate refrigeration sub-bids
- Estimating firms pricing grocery/retail refrigeration packages
If your team spends days converting piping schedules into bid numbers, Aginera compresses that into minutes — with transparent formulas you can verify and adjust.
Try It on Your Next Refrigeration Plan Set
Upload a grocery or retail refrigeration PDF. See the piping schedule extraction, line-type breakdown, hanger calculations, and labor model for yourself.
Start your free trial at aginera.ai — no credit card required.
Or explore the Refrigeration Estimating Solution page for technical details on every extraction capability.
Aginera is an AI-powered construction takeoff and estimating platform built for MEP and refrigeration contractors. From piping schedule extraction to bid-ready estimates, Aginera handles the heavy lifting so your team can focus on winning work.
