This project covers the complete replacement of Midwest Plumbing & Mechanical Supply's 2008-era HVAC system across the full 12,000 sq ft warehouse — from decommission to commissioned handover — executed in stages that keep your operation running throughout.
What Is Included
Existing System Removal & Site Preparation
We will decommission all existing HVAC equipment, recover refrigerant in accordance with EPA Section 608 requirements, and remove associated ductwork sections in a deliberate sequence. Removal is staged by zone, not all at once. At least partial conditioning remains active in occupied areas while each zone is worked — this is a non-negotiable constraint we've built the entire schedule around. Recovered refrigerant weights and disposal manifests are documented and compiled into the Staged Removal & Abatement Report, which closes Phase 2.
Equipment Supply & Staging
We procure, deliver, and stage all replacement equipment to site. This includes commercial-grade rooftop units, air handlers, humidity control components, and all associated controls and hardware. Equipment arrives per the procurement schedule developed during Phase 1; staging locations are coordinated with your operations team to avoid blocking active warehouse aisles. Nothing is ordered speculatively — procurement is driven by the stamped engineered drawings produced in Week 3.
Mechanical Installation
Our scope of mechanical work includes:
- Setting and curbing all replacement rooftop units on the warehouse roof
- Refrigerant piping, leak testing, and pressure verification at each unit
- Ductwork modifications — new supply, return, and exhaust runs, plus diffuser and damper placement throughout the warehouse
- Condensate drain lines from all equipment to appropriate building drain points
- Electrical connections from the dedicated HVAC circuits to each unit and control component, per the engineered drawings
All work is executed per the stamped installation drawings and in compliance with applicable mechanical and electrical codes. We pull the mechanical permit and schedule all required rough-in and final inspections with the authority having jurisdiction. Permit fees are passed through at cost on a separate line-item invoice — they are not included in the $42,000 contract value.
Humidity Control
The condensation damage your storage areas have been experiencing is a specific failure of the 2008 system's inability to maintain stable dew-point control. We address this directly by installing dedicated humidity sensing and control components integrated with the main system — not bolted on as an afterthought. Humidity set-points are verified during commissioning against the design conditions established in the engineering phase.
Controls & Commissioning
Once equipment is mechanically complete, our Controls & Commissioning Technician configures all programmable controls, balances airflow across every warehouse zone, and verifies humidity set-points against design specifications. The Commissioning & Balancing Report documents test-and-balance results and controls data for every zone — this is the formal performance record that the final payment milestone is tied to.
Documentation & Handover
The project closes with a complete handover package: as-built drawings reflecting any field changes, manufacturer warranty registrations for all major equipment, O&M manuals, and a recommended preventive maintenance schedule. We conduct a formal walkthrough with your designated facilities representative before we consider the job done.
What Is Explicitly Excluded
The following are outside this contract. If any are uncovered during the work, they are addressed via change order — they will not be absorbed silently or delay the project without your written direction:
- Structural roof reinforcement or roof membrane repair
- Electrical service panel upgrades beyond the dedicated HVAC circuits already in scope
- Plumbing or process piping unrelated to HVAC condensate and drain lines
- Any remediation of pre-existing mould, asbestos, or other hazardous materials discovered during equipment removal
- Ongoing preventive maintenance or service contracts after handover
- Permit fees (passed through separately at cost)
If hazardous materials are encountered during removal, we stop work in the affected zone immediately, document the condition, and issue a written RFI within 24 hours. Remediation is a separate scope and a separate contract — continuing without resolution is not an option.
Permits & Inspections
Cardinal Mechanical pulls the mechanical permit and manages all inspection scheduling with the authority having jurisdiction. Electrical permit coordination follows local requirements — we handle the application; your designated lockout/tagout contact is required to be available before mechanical work begins in each zone. We do not proceed in any zone without the required permit in hand.
The line between what we own and what sits outside this contract is drawn clearly above. Any condition that falls outside it gets a change order, a price, and your written approval before we move forward.