Build the fact pattern.
Complaint, timing, weather, occupancy, operating state, equipment identity and service history.
Independent facilities support · Commercial clients only
Your facilities.
One point of coordination.
Give your company a partner for facility operations, vendors and technology. ICY organizes the work, connects the right providers and keeps the next step clear.
Ongoing support contracts or help with one defined project.
Free knowledge · Useful worldwide
Understand the building.
Follow the reasoning.
Heat, air and moisture cross borders. These guides explain the mechanisms, show what to measure and keep the assumptions visible. Read the science, use the diagrams and take the field records with you.
The public library stays free. When your company needs help putting the findings to work, ICY offers commercial facilities support and project coordination.
The ICY difference
Heat does not disappear.
It moves.
Sun, outdoor air, people, lights and equipment add heat. Roofs, glass, walls and the air above the ceiling store and move it. An air conditioner absorbs indoor heat and must release that heat outdoors. When heat enters faster than it leaves, the building warms. ICY checks both sides before recommending a repair or more equipment.
Worldwide building-science library
Read the mechanism. See how to measure it. Keep the limits visible.
ICY publishes plain-English explanations of heat, moisture, airflow, cooling capacity and verification. Each article identifies its primary sources, practical checks, uncertainty and what the evidence cannot establish by itself.
Building-science articleWhy a Building Stays Hot: A Heat-Balance PrimerFollow heat entering, accumulating in and leaving a building before treating a hot-space complaint as an equipment-size decision.Building-science articleDew Point, Surface Temperature and CondensationUnderstand why relative humidity alone cannot predict condensation and how moisture, air pathways and cold surfaces interact.Building-science articleSensible and Latent Cooling: Temperature Is Only Part of the LoadSeparate temperature reduction from moisture removal when evaluating comfort, coil performance, runtime and ventilation load.Building-science articleAirflow and Building Pressure: Follow the Complete PathTrace supply, return, outdoor air, exhaust and leakage as one mass-balance system instead of treating a door or grille symptom in isolation.
Lower-energy commercial cooling
Reduce the load before adding tonnage.
External shade, a suitable roof and envelope strategy, lower internal loads, better air distribution, climate-aware outdoor-air control and commissioned sequences can reduce the work mechanical cooling must do. In hot-humid weather, every natural-air idea must also pass a dew-point and moisture-control check.
Open the hot-humid decision ladder and 12-strategy screening matrix →The temporary-AC trap
Cold air in front. Hot air above.
A floor unit may make one person feel cooler while its hot side warms the ceiling space. If that heat never crosses the outside wall, the whole building has not been cooled. The machine's electrical power adds still more heat indoors.
See the child-simple explanation and the full science →Start with what people actually feel
Plain answers for common commercial AC problems.
Hot building, weak airflow, high humidity, long runtime, control trouble or another repeat failure: each guide explains what can cause it, what to check first and which expensive shortcuts to avoid.
Commercial symptomAC not coolingThermostat reaches setpoint slowly or neverCommercial symptomHot and cold spotsFront glass zone overheats while interior rooms overcoolCommercial symptomHigh humiditySticky or clammy occupied spaceCommercial symptomWeak airflow or stuffinessLittle air at distant or critical registersCommercial symptomPressure and door problemsExterior doors pull, slam or will not close normallyCommercial symptomHigh bills or long runtimeEquipment operates outside business hoursCommercial symptomRepeated breakdownsThe same component or circuit fails againCommercial symptomThermostat or controlsSetpoint changes do not produce the expected responseCommercial symptomWater or condensate leaksCeiling tile, floor or equipment cabinet becomes wetCommercial symptomOdors or stuffy airMusty odor when equipment startsCommercial symptomRooftop unit problemsUnit runs but zone temperature remains high
Open all 11 commercial problem guides →
One building · one heat balance
The entire problem in one line of sight.
Follow heat from entry, through the building, into the return air and out through the condenser. Then correct the imbalance in the least-wasteful order: measure, reduce avoidable load, restore airflow and pressure, recover cooling capacity, and add equipment only when a measured gap remains.
A repeatable field sequence
Write it down. Measure it. Compare it. Recheck it.
A difficult building may have several real faults at once. ICY keeps the complaint, direct observations, measurements and trade findings separate so the next dollar addresses the best-supported cause.
Test the interacting systems.
Thermal and moisture map, air delivery, pressure relationships, power, controls, equipment and envelope.
Choose the least-wasteful path.
Repair, rebalance, reduce load, supplement or replace—with assumptions and missing facts left visible.
Check the occupied result.
Recheck operation, drainage, controls, air delivery and the agreed comfort criteria after the work.
Before adding a mini-splitIs there a measured zone load—or an upstream fault that should be repaired first?
Review the design questions →Root-cause field method
Six systems. One corrective scope.
ICY records observations and measurements in context, separates findings from hypotheses, and identifies the trade authority required for each next action.
Thermal map
Occupied-zone, ceiling/plenum, glazing, roof-facing surfaces, supply and return temperatures—captured with time and operating state.
Air delivery
Supply/return paths, filter and coil condition, blower/belt state, register behavior and available airflow evidence.
Pressure & infiltration
Door behavior, exhaust interaction, penetrations and zone-to-zone pressure relationships measured when the scope calls for it.
Envelope & solar load
Glass orientation, shading, roof/ceiling heat, insulation continuity and obvious pathways that add sensible or latent load.
Power & controls
Equipment labels, disconnects, circuits, thermostats, sensors, sequences and control conflicts routed to the appropriate trade.
Equipment performance
Capacity, condition and refrigeration findings supplied or verified by a qualified HVAC provider, then tested against space performance.
The exact instrument set and licensed provider are confirmed for each scope; this page does not claim that every test applies to every building.
GCT conceptual illustration · not a customer installation record
Mini-splits, designed—not improvised
Add control where the load actually lives.
Ductless systems can be an excellent answer for an isolated hot zone, supplemental resilience, an addition without viable ductwork, or a staged retrofit. They are not a substitute for correcting bad power, a refrigerant leak, blocked airflow, failed controls, unmanaged ventilation or an envelope problem.
- Load and zone rationale documented before selection
- Placement, condensate, line-set protection and service access planned
- Dedicated electrical scope and required disconnect coordinated
- Startup, controls, drainage and occupied-zone performance verified
Illustrated commercial example · no customer identified
A cold floor unit can hide a hot-building problem.
A temporary unit cools the sales floor at its front grille, but its condenser stream ends above the ceiling. The site also has sunlit glass, permanent HVAC equipment and several parties with different access and maintenance duties. The correct next step is not to assign blame from a thermostat reading. It is to map where heat enters, where every unit rejects heat, how air crosses the ceiling and exterior boundaries, and what the occupied zone does when each system changes state.
This is a worked building-science example, not a customer case. It shows how ICY turns a confusing complaint into measurements, assigned responsibilities and a result that can be checked.
Science you can inspect
Building physics in public.
The ICY method is anchored to official DOE, NIST and EPA material on heat transfer, portable air conditioners, commissioning, pressure-driven airflow, moisture, load calculation and air distribution.
Worldwide data & practical tools
A place to start.
A record of what you measure.
Explore 2,800 communities across 146 countries and territories, selected from port-related reference datasets. Seven featured groups of 400 rotate daily; every community remains available to browse.
Use a location as context, then record actual conditions. The directory is an educational reference, not a service-area map or a report of local weather or building conditions.
Open the community explorerField-record methodRecord operating conditions, measurements and uncertainty.Download the blank field recordA CSV you can keep and use for your own observations.Building-science glossaryShared definitions for the terms used throughout the library.Library dataA machine-readable map of the eight guides and their sources.How the library is writtenPublished science, field interpretation and the limits of each.
Local roots and multi-site requests
Find the context for your location.
ICY is operated by GCT from Wiggins, Mississippi. These guides help prepare a commercial request; a listed community does not imply a local office, available provider or guaranteed response. Location, qualifications, travel, scope and price are confirmed before work.
Wiggins and the Gulf Coast
Regional request guides
Browse by state
Two ways to work with ICY
A steady partner.
Or a focused helping hand.
Facilities Support
Service Contracts
For companies that need someone to coordinate recurring facility needs, vendors and open work across one location or many.
- Agreed responsibilities and service priorities
- Vendor coordination and work-order follow-through
- Reporting, invoice review and payment administration as scoped
Project &
Vendor Assistance
For a repair, installation, provider search or technology project that needs a clear brief and someone to move it forward.
- Define the work and source appropriate providers
- Coordinate access, instructions and handoffs
- Review completion against the agreed scope
Each engagement is quoted for your locations, workload and responsibilities. No automatic subscription or charge.
Buildings, people and systems
Support across the operation.
From a ceiling tile to a server room, the work still needs a clear owner, an appropriate provider and a useful completion record.
Facility operations
Recurring needs, service priorities, maintenance coordination and records that help your team see what is open.
Vendor coordination
Provider sourcing, scope clarification, scheduling and a liaison between your company and the people doing the work.
Payment administration
Invoice checks, approval routing and payment coordination within your agreed authority and process.
Work instructions
Practical procedures, safety guides and service documentation, with responsible technical review where required.
Commercial installations
Building finishes, equipment, lighting, signage and other defined installation projects, with trade requirements confirmed.
IT, ERP & networks
Business systems, ERP implementation, devices, servers and enterprise network infrastructure.
See technology supportClear before the work starts
A scope. An approval.
A record of completion.
- Understand
Your locations, recurring needs, current providers and the problem to solve.
- Agree
Responsibilities, provider roles, price, approval limits and completion criteria.
- Coordinate
Instructions, scheduling, access, updates and the people responsible for each step.
- Close out
Review the work record, flag open items and document the next action.
A practical first step
Start with the work you need done.
Tell us about your company, locations and priorities. We will confirm the scope, responsibilities and price before work begins.