Commercial HVAC Blog | Guides for Facility Managers | SBS-NC, LLC
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Commercial HVAC, explained straight.

Guides for facility managers and building owners — written by the company that self-performs the work. No fluff, no scare tactics, real numbers where we have them.

Hiring a Contractor

4 Questions Every Facility Manager Should Ask Their Commercial HVAC Contractor

Four questions that take five minutes to ask and reveal exactly what kind of contractor you are about to sign with.

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Hiring a Contractor

Why Self-Performing HVAC Contractors Outperform Third-Party Brokers

Where broker markup and slow response actually come from — and what changes when the company you call employs the technician on your roof.

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Preventative Maintenance

What Commercial HVAC Preventive Maintenance Actually Covers — and Why It Matters

A real PM visit is a checklist, not a walk-past. Here is what should be on it, and what each line item is protecting you from.

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Preventative Maintenance

The Financial Case for Multi-Site HVAC Preventative Maintenance

For a Greensboro operator with ten roofs, the question is not whether you pay for maintenance — it is whether you pay planned rates or emergency rates.

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Repairs

8 Unexpected Consequences of Putting Off Commercial HVAC Repairs

The repair you deferred does not wait quietly. Eight ways a known problem compounds while it sits on the list.

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Efficiency

Understanding IEER: The Efficiency Number That Matters for Commercial HVAC

Your next rooftop unit will be sold on its IEER. Here is what the number actually measures and why part-load performance is where your money goes.

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Equipment Guides

Commercial HVAC Compressors: Types, Failures, and Replacement Decisions

The compressor is the heart of the system and the most expensive part in the cabinet. What the types mean, why they die, and what to do when one does.

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Equipment Guides

Reciprocating Compressors: The Workhorse That Won't Retire

Pistons, valves, and a crankshaft — the oldest compressor design in commercial HVAC is still everywhere. How it works, how it fails, and when it's still the right choice.

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Equipment Guides

Screw Compressors: Big-Tonnage Cooling for Chillers and Industrial Loads

Two meshing rotors, no pistons, near-continuous flow — the compressor that carries big chillers and industrial loads, and the maintenance that keeps it spinning.

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Equipment Guides

Centrifugal Compressors: How Large Chiller Plants Move Serious Tonnage

An impeller instead of a squeeze — the turbomachine at the heart of the biggest chiller plants, what 'surge' means, and why modern oil-free designs changed the game.

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Equipment Guides

Semi-Hermetic Compressors: What They Are and Why They're Rebuildable

Bolted, openable, and rebuildable — the serviceable compressor that powers larger commercial equipment, and the maintenance that keeps it alive.

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Equipment Guides

The Business Owner's Guide to Scroll Compressors

If your building has rooftop units made in the last twenty years, scroll compressors are what's inside. Here's how they work and how they fail.

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Equipment Guides

What Are Rooftop Package Units (RTUs)? A Building Owner's Guide

The gray boxes on your roof do everything — heat, cool, ventilate — in one cabinet. What's inside, how long they last, and what they need from you.

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Equipment Guides

Commercial Split System HVAC: Where It Fits and What It Needs

When the equipment can't all live on the roof, the system splits in two. Where commercial splits make sense and how to keep them reliable.

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Equipment Guides

VRF HVAC Systems for Commercial Properties: A Practical Guide

One outdoor unit, dozens of indoor units, and refrigerant that flows exactly where it's needed. What VRF does well and what it demands in return.

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Central Plant

Commercial Chillers: All You Need to Know

The one-machine backbone of larger buildings. How chilled water systems work, air-cooled vs. water-cooled, and what ownership really involves.

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Central Plant

Cooling Towers: How They Work and What They Demand

The tower is where your whole plant's heat leaves the building — through evaporating water. That water is the asset and the liability.

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Central Plant

Commercial Boilers: Types, Maintenance, and Heating-Season Readiness

Fire-tube, water-tube, condensing — what the types mean, the maintenance that keeps inspections boring, and why fall readiness beats a January failure.

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Central Plant

Chiller Not Working? What to Check Before You Call

What building staff can safely check in the first ten minutes, what usually turns out to be wrong, and the one habit that destroys compressors.

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Central Plant

How Long Do Chillers Last? Repair vs. Replace for Winston-Salem Buildings

Typical lifespans, what shortens them, and a straightforward way to decide whether the next repair is worth it.

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Industrial

HVAC for Factories and Manufacturing Plants in Greensboro, NC

Factory HVAC isn't comfort cooling with bigger units. Make-up air, process loads, exhaust balance, and maintenance that can't stop the line.

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