Katy · Inside the City Limits
HVAC, Electrical & Insulation in Old Katy
Older-home rewiring, duct replacement, and honest AC replacements for Old Katy's in-city homes from the 1950s–1980s. Call (832) 782-3490.
Avatex Service Company serves Old Katy — the original city of Katy proper, inside the city limits, distinct from the master-planned communities that carry a Katy address. Its housing stock runs decades older than Cinco Ranch: 1950s–1980s homes on generous lots, many with original ductwork, aging panels, and window-unit histories. We bring the older-home playbook: rewiring, panel upgrades, duct replacement, and right-sized equipment. TACLA #89729C, TECL #34162, Master Electrician #535138.
- Family-owned & operated
- TACLA #89729C · TECL #34162
- Goodman dealer · NATE certified
- Same-day service, 7 days a week
The original Katy, decades older than its suburbs
Old Katy — the blocks around downtown Katy, Katy Mills' older side, and the rice-farming-era street grid — predates the master-planned boom by decades. Homes here span the 1950s through the 1980s: modest one-stories, farmhouse-era survivors, and infill from every decade since.
That mix means no two quotes look alike. One house needs a full duct replacement over a 1960s furnace closet; the next needs aluminum-wiring remediation before any new equipment is safe to install. We diagnose house by house instead of quoting by ZIP code.
Mid-century electrical under modern loads
Panels and branch circuits from the 1950s–70s meet space heaters, EVs, and 5-ton condensers badly. Our Master Electrician inspects, remediates, and upgrades with City of Katy permits.
Original or ad-hoc ductwork
Decades of piecemeal renovations leave duct systems that leak into attics and crawl spaces. We test, then quote sealing or replacement only where the numbers justify it.
Right-sizing after additions
Old Katy homes have been added onto for generations. A load calculation — not the old nameplate — decides the replacement size, so the new system dehumidifies properly instead of short-cycling.
Rebates & permits in Old Katy
Old Katy is CenterPoint Energy territory in the retail-choice market. CenterPoint incentives start at $200 for qualifying 15.2+ SEER2 replacements, applied through a participating contractor as an invoice discount, and the free ComfortCheck A/C tune-up covers qualifying systems (verified July 2026 at centerpointenergy.com).
Inside the city limits, mechanical and electrical permits run through the City of Katy rather than a county office — we pull city permits and schedule inspections as part of every job. The federal 25C energy-efficiency tax credit ended for equipment placed in service after December 31, 2025, so utility programs are the main source of HVAC savings in 2026 (verified July 2026 against the IRS OBBB FAQ).
Not sure what applies to your home? Start with a free second opinion on any quote or browse the Avatex Learning Center for plain-English guides, and Wisetack financing options for bigger projects.
What does Avatex service in Old Katy?
The services Old Katy homes call us for most — each page covers scope, process, and scheduling for Katy-area homes.
Old Katy questions we hear the most
Is Old Katy different from the Katy master-planned communities for HVAC work?
Very. Old Katy homes are decades older — mid-century wiring, original ducts, and additions built over generations. The playbook is inspection-first: electrical safety, duct condition, then equipment.
Who issues permits inside the city of Katy?
The City of Katy. Change-outs and electrical work inside the city limits are city-permitted and inspected — Avatex handles the paperwork and scheduling.
My older Katy home has rooms that never cool — new AC?
Maybe not. Uneven rooms in older homes usually trace to duct leaks, missing returns, or thin insulation. We test before quoting, because a bigger unit can't fix a duct problem.
Is there a rebate for replacing an old system in Katy?
Yes — CenterPoint incentives start at $200 for qualifying 15.2+ SEER2 systems, applied to your invoice through a participating contractor (verified July 2026).
Ready for honest service in Old Katy?
Call (832) 782-3490 or request a free estimate — same-day service is available across the Katy area, seven days a week.