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Sentinel Air Conditioning & Heating in Spring, TX is a family-owned and operated service company dedicated to providing quality HVAC services at the best value. Their team is committed to protecting indoor environments, vital equipment, and reducing operating costs for their customers. With a focus on mechanical services and building automation, Sentinel offers a range of solutions from maintenance and repairs to system design. Customers can rely on their experienced team to meet the unique needs of their facilities and become part of the Sentinel family.Generated from the website

Johnstone Supply Houston is a leading HVAC/R Wholesale Distributor with access to over 70,000 locally stocked products and inventory so you can get it same or next day in most cases. Our product selection is continually growing to meet the needs of HVACR contractors to ensure we have the best brands and technology. Plus, our relationships with hundreds of the industry's top manufacturers give you access to a million special order parts. From equipment, to parts, to supplies you can be confident Johnstone has what you need today. Johnstone Supply: Making it Easier to do Business.

Uson offers a range of leak testing equipment for the automotive, pharmaceutical and general engineering, industrial, packaging and medical sectors. The company provides calibration, feasibility testing, and repair and maintenance services. Uson offers a variety of accessories, such as connectors, printers, cables and probes. The company provides transducers, motherboards, lamps and tube sets. Uson s products are sued for testing faucets, showers, valves, turbo chargers, electric motors, thermostats, and electronic and mechanical control devices. The company additionally provides telephone support and training services. Uson offers a variety of pressure decay and functional testers. The company operates in the United States, China and Germany.