HVAC Company in Houston, TX

Air Conditioning Services

Beat Houston’s intense summer heat with OneCall Houston’s air conditioning expertise. We diagnose and repair all AC problems – from clogged condensate lines and refrigerant leaks to failing compressors and malfunctioning coils – using modern diagnostic tools and replacement parts. We service all brands and models, whether a central air system, ductless mini-split, or packaged unit. When installation is needed, our experts will perform precise load calculations and recommend energy-efficient systems (many up to 20+ SEER) to ensure optimal cooling with lower electric bills. We also prioritize preventive maintenance: routine AC tune-ups (cleaning coils, checking refrigerant and airflow) catch small issues early, keeping your system running efficiently and avoiding costly failures. In Houston’s climate, even minor airflow restrictions or leaks matter – experts note that humidity and heat put tremendous stress on AC systems. That’s why we also offer 24/7 emergency AC repair service – one call to OneCall Houston gets us on the way immediately.

Heating Services

Although Houston winters are mild, dependable heating is still important during cold snaps. We provide comprehensive furnace and heat pump services: repairs, seasonal tune-ups, and new system installations. Our technicians are trained on all gas, electric and heat pump heating systems. We follow manufacturer schedules for maintenance to prevent breakdowns – for example, experts recommend heating tune-ups each fall so you aren’t left in the cold. When repairs are needed (thermostat issues, ignition malfunctions, motor failures, etc.), we act quickly to restore heat. We also replace aging furnaces or heat pumps with high-efficiency units. As with cooling, regular heating maintenance improves efficiency and longevity. In short, OneCall ensures your home stays warm and safe whenever temperatures dip.

Indoor Air Quality Services

The Gulf Coast climate can bring mold, pollen and humidity into the home. OneCall Houston offers indoor air quality (IAQ) solutions to help. We install and service whole-home systems like HEPA air filters, UV germicidal lights, and humidifiers/dehumidifiers. These systems remove dust, bacteria, viruses and excess moisture from the air. For example, UV lights within your ducts can kill mold and pathogens, while whole-house filtration traps particulates. Better IAQ not only makes your home feel fresher, it protects health: improved air filtration and ventilation have been shown to reduce asthma and allergy symptoms. Our IAQ experts will evaluate your home’s needs and recommend the right combination of filtration, UV treatment or ventilation upgrades to keep your air as clean and comfortable as possible.

Ductwork & Ventilation Services

Efficient airflow is critical in Houston’s hot, humid environment. We inspect, clean, repair and install ductwork to maximize your HVAC system’s performance. Even a small leak or poor insulation in your ducts can dramatically cut system efficiency: sealing or properly installing ducts can improve overall performance by up to 20%. We use high-quality materials and industry best practices (proper sealing, mastic tape, insulation) so that conditioned air isn’t wasted. Whether you need old ducts replaced, new venting for an addition, or regular duct cleaning to remove debris and allergens, our technicians will tailor a solution. Properly maintained ducts also improve indoor air quality by reducing dust and allergens in circulated air.

Thermostat & Control Services

Modern thermostats can save energy and enhance comfort. We install, program and repair smart and programmable thermostats, zone-control systems, and other controls. A quality programmable thermostat alone can save up to $180 per year on utility bills by preventing unnecessary heating or cooling. We’ll set up Wi-Fi or multi-zone thermostats so you can easily adjust temperatures and schedules. If you have an existing system that isn’t cooling or heating evenly, our thermostat calibration services ensure your equipment runs as intended. Plus, our team can integrate smart home devices (Nest, Honeywell, Ecobee, etc.) so you can control your comfort from anywhere. In short, we help your HVAC system work smarter, saving you energy without sacrificing comfort.