Homes
- Repairs with a written price
- Two-system houses and zoning
- Heat pumps and high-efficiency replacements
- Humidity, filtration and drainage
The Woodlands · North Houston
Quiet, exact air conditioning.
Heating, cooling and air quality for Woodlands homes and businesses — installed precisely, maintained on schedule, and honest about what a system can and cannot do.
Who we work for
Houses under the pines, and the offices beside them
Businesses
- Rooftop and split systems
- Planned maintenance with unit logs
- Clinics, salons and restaurants
- Tenant improvement HVAC
Generator check
Will the air conditioning run when the power goes?
A compressor asks for a large gulp of current the moment it starts. That surge, not the running load, is what decides whether a generator carries your system — and a soft starter changes the arithmetic completely.
Pick your system size and see the figures people usually plan around.
How we work
The details you see are the details you don't
- Measured firstAirflow, charge and temperatures — then the recommendation.
- Written pricesBefore anything is ordered, with the options side by side.
- Finished properlyLine sets straight, pads level, penetrations sealed, site clean.
- ExplainedYou get the numbers we measured, not a verdict.
Questions
Before you call
Is Onyx a coatings company?
No. Building Coatings is part of our name. We work only on heating, ventilation and air conditioning.
Will my air conditioner run on a generator?
It depends on the start-up surge more than the running load. Our generator page shows the figures people plan around, and a soft starter changes them a lot.
The upstairs and downstairs never agree. Why?
Two systems that were set up separately, or one system with no zoning. We measure both floors before recommending anything.
Why does the house feel damp even when it is cold?
Short run times. A system that cools quickly and stops does not run long enough to pull moisture out of the air.
Do you work on offices and clinics?
Yes. Rooftop units, ventilation, controls, tenant improvements and planned maintenance with a record per unit.
Will I get a price before work starts?
Yes. Repairs are priced in writing after diagnosis, and replacements are proposed in writing.
Service area
The Woodlands and around
1335 Lake Woodlands Dr, The Woodlands, TX 77380
The Woodlands, Spring, Shenandoah, Oak Ridge North, Conroe, Magnolia and Tomball.