Emergency & Commercial HVAC in Houston - On-Site Today, Priced Before We Start

Fast, Reliable Emergency & Commercial HVAC Across Houston

When your commercial rooftop unit shuts down at 2 a.m. in July, or your office chiller throws a high-pressure alarm on a Saturday, you need a company that answers the phone and sends someone who knows Houston’s equipment. We do both. Call (833) 313-7291 - a live person picks up, every hour of every day, and our Emergency & Commercial HVAC in Houston crews are typically on-site within the hour for calls inside the Loop and in the Meyerland, Memorial, and Bellaire corridors.

Call (833) 313-7291

Houston’s Gulf-driven humidity and attic-baked air handlers create failure modes that technicians from drier climates miss. We’ve spent 42 years learning them.

Why Fireside Heating & Air Co. of Houston Is Houston’s Preferred Emergency & Commercial HVAC Company

We’ve been in this market since 1984. That’s four decades of watching Houston’s commercial buildings age, its residential stock settle into predictable patterns, and its climate punish equipment that was never designed for 130°F attic temperatures paired with 75°F dew points. Our customers stay with us because we tell them what their system actually needs, quote a price we stand behind, and back the work with a written 90-Day Done Right Promise - no paperwork, no arguing.

Our phones are answered by a live person 24 hours a day, 7 days a week, including holidays. Nights, weekends, the 2 a.m. no-heat emergency - never a voicemail tree. Our technicians are background-checked, uniformed journeymen who put on shoe covers without being asked and treat your building the way they would their own mother’s home. Most jobs are completed in a single visit.

We service nine major brands - Carrier, Trane, Lennox, Goodman, Rheem, York, Daikin, Bryant, and American Standard - and stock common parts for Houston customers so we’re not ordering and returning. The price quoted is the price paid. Full stop.

Our Emergency & Commercial HVAC Services in Houston

24/7 Emergency HVAC

Houston’s heat doesn’t take nights off, and neither do we. When your float switch trips from a plugged condensate drain - the most common summer emergency call we see - or your capacitor swells and fails in a 150°F attic, you need someone who carries the right parts and knows why it failed. We answer live at (833) 313-7291 and dispatch from Houston, not a call center in another state. Our Emergency & Commercial HVAC team treats after-hours calls with the same urgency as business hours because we know what’s at stake: a restaurant’s walk-in cooler, a nursing home’s patient rooms, a family’s home with an elderly resident.

Commercial HVAC

Houston’s commercial buildings run hard and long. Strip malls along Westheimer, office parks near the Galleria, warehouses in the East End - we’ve serviced them all. Commercial systems here face a double load: the building’s occupancy demands plus the ambient heat and humidity that force equipment to work as a dehumidifier first and a cooler second. We size replacement equipment for latent load, not just temperature setpoint, because an oversized unit that short-cycles will drop the thermostat reading while leaving relative humidity at 65-70%. That’s the clammy, mold-prone condition that generates callbacks and complaints.

Rooftop Unit (RTU) Service

Rooftop units are common on Houston’s low-rise commercial buildings, especially the 1970s-1990s vintage structures in areas like Gulfton and along Interstate 10. These units bake in direct sun on reflective roofs, accelerating refrigerant line degradation and compressor strain. In Meyerland, we responded to a commercial rooftop unit on a 1970s strip mall that was cycling on its high-pressure limit switch. We found a plugged condensate drain line from biofilm - standard in Houston’s humidity - that had backed up and soaked the duct insulation, reducing airflow. We cleared the line, replaced the capacitor (swollen from attic heat), and added a pan tab treatment to prevent recurrence. Annual maintenance catches this before it becomes an emergency.

Chiller Service

Houston’s larger commercial and institutional buildings - hospitals, hotels, data centers, university facilities - rely on chillers for centralized cooling. After a long Houston summer, startup procedures matter. We inspect refrigerant levels, check oil condition, verify control sequences, and confirm that condenser water loops are clean and flowing. A chiller that’s been idle through a mild winter can harbor moisture in the refrigerant circuit, and Houston’s humidity makes that risk real. We don’t guess. We test, record, and report what we found.

Annual Maintenance & HVAC Inspection

In Houston, annual maintenance isn’t a luxury. It’s how you avoid the emergency call. Our tune-ups include condensate drain flush and pan-tab treatment as standard - not an upsell - because algae and biofilm growth here is so endemic that a neglected drain pan becomes a petri dish within a single season. We also inspect capacitors for heat swelling, check refrigerant line insulation for attic heat degradation, and verify that your system is managing latent load, not just dropping temperature. Our $89 Seasonal Tune-Up is priced to remove the excuse for skipping it.

Trusted Brands We Service in Houston

We train our technicians on nine major brands: Carrier, Trane, Lennox, Goodman, Rheem, York, Daikin, Bryant, and American Standard. For Houston customers, this means we stock common capacitors, contactors, motors, and control boards for the brands most frequently installed in this market. We don’t order parts blind and make you wait. When a Memorial-area homeowner’s 18-year-old Carrier air handler fails on a Saturday evening, we carry the likely failure points on the truck. If your system is a brand we don’t see often, we’ll tell you upfront and source parts fast. No pretending, no surprises.

Common Emergency & Commercial HVAC Problems We See in Houston Homes

• Plugged condensate drains from algae and biofilm. Houston’s combination of year-round heat, near-constant system runtime, and ambient humidity turns neglected drain pans into clog factories. The float switch shuts the system down to prevent ceiling water damage, but the result is the same: no cooling, often at the worst possible time.
• Capacitor failures from sustained 150°F attic ambient temperatures. Houston’s near-universal practice of installing air handlers in attics means capacitors work in conditions that cut their lifespan in half compared to basement-installed units. We see swollen, leaking capacitors as a routine summer failure.
• Refrigerant line degradation from constant operation in high-heat, high-humidity attic spaces. The suction line insulation breaks down, lines sweat, and efficiency drops until the system can’t maintain setpoint. In Houston’s older homes, especially the 1970s-1990s ranch stock in Meyerland and southwest Houston, original refrigerant lines often run through attic spaces that hit 130-150°F.
• Short-cycling on mild days due to oversized equipment. An oversized unit drops the thermostat reading quickly but shuts off before dehumidifying, leaving relative humidity at 65-70%. The space feels clammy, occupants lower the setpoint further, and the cycle worsens. This is a design and sizing problem, not a thermostat problem.

Pricing for Emergency & Commercial HVAC in Houston, TX

We Also Serve Cities Near Houston

Our service area extends to Bellaire, West University Place, Galena Park, and Jacinto City. If you’re unsure whether we cover your location, call (833) 313-7291 and we’ll tell you straight.

FAQs - Emergency & Commercial HVAC in Houston