HVAC technician at work
St. Louis, MO · Since 1991

Niksic
A/C &
Heating

Mechanical
·
Electrical
·
Plumbing

Niksic Air Conditioning & Heating (NIKSIC MEP LLC) is St. Louis's full-service Mechanical, Electrical & Plumbing contractor — serving residential and commercial customers across the metro area for 35+ years since 1991. One company for all three trades. Free estimates.

(314) 631-6177 View All Services
35+
Years in St. Louis
3
Trades Under One Roof
50+
Mile Service Radius
$0
Estimate Cost
Mechanical
HVAC installation, repair & maintenance
Electrical
Commercial & residential electrical services
Plumbing
Full plumbing installation & service
HVAC technician inspecting equipment
35 Years
About Niksic MEP LLC

Full-Service
MEP Since 1991

Niksic Air Conditioning & Heating is a full-service MEP (Mechanical, Electrical & Plumbing) contractor based in South St. Louis. Founded in 1991, we've been providing quality, fast, and clean HVAC, electrical, and plumbing services to homeowners and businesses throughout the St. Louis metro area for over 35 years.

Whether you need a new air conditioning system, a heating repair in the dead of winter, electrical work, or plumbing — our experienced team handles all three trades with the professionalism and attention to detail that has kept St. Louis customers coming back for decades.

Residential & Commercial Both homes and business properties
Free Estimates No-charge quotes on all work
Quality & Clean Work Every job done right, every time
50+ Mile Radius All of St. Louis metro and beyond
What We Do

Our Services

Mechanical, Electrical & Plumbing — all three trades, one trusted contractor.

Air Conditioning

Installation, repair, and replacement of central AC systems, ductless mini-splits, and commercial cooling equipment throughout St. Louis.

Residential & Commercial

Heating Installation & Repair

Furnace installation, repair and tune-ups, heat pump systems, and boilers — keeping St. Louis homes and businesses warm all winter.

Residential & Commercial

HVAC Maintenance

Scheduled tune-ups, filter changes, coil cleaning, and preventive maintenance to extend equipment life and maintain peak efficiency.

Residential & Commercial

Electrical Services

Full electrical contracting as part of our MEP offering — panels, wiring, outlets, commercial electrical systems, and more.

Residential & Commercial

Plumbing Services

Installation and repair of plumbing systems as part of comprehensive MEP contracting for residential and commercial buildings.

Residential & Commercial

Commercial HVAC

Commercial-scale heating and cooling systems for offices, retail spaces, restaurants, and industrial facilities throughout the metro area.

Commercial

Residential HVAC

Home comfort specialists — complete HVAC solutions for St. Louis homeowners, from new system installation to fast repair and seasonal tune-ups.

Residential
Why Choose Niksic

Quality.
Fast.
Clean.

35+ Years of Experience

Founded in 1991, Niksic has served the St. Louis metropolitan area for over three decades. That depth of experience means faster diagnosis, better results, and fewer callbacks.

Three Trades, One Company

As a full MEP contractor, we eliminate the coordination headaches of managing multiple subcontractors. Mechanical, Electrical, and Plumbing — all under NIKSIC MEP LLC.

Free Estimates

We provide free, no-obligation estimates on all work. Know your costs upfront before any work begins.

50+ Mile Service Radius

Based in South St. Louis at 4444 Gustine Ave, we serve the entire metro area — Missouri and Illinois side — within a 50+ mile radius.

HVAC professional working on commercial system
Electrical panel work
Service Coverage

St. Louis Metro & Beyond

Based in South St. Louis, Niksic Air Conditioning & Heating provides HVAC, electrical, and plumbing services to residential and commercial customers throughout the metro area and surrounding communities.

St. Louis City St. Louis County Clayton Kirkwood Webster Groves Ballwin Chesterfield Florissant O'Fallon, MO Belleville, IL Collinsville, IL Edwardsville, IL
50+ Mile Service Radius from St. Louis
Common Questions

FAQ

Answers to the most common questions about HVAC service, MEP contracting, and working with Niksic.

HVAC installation costs in St. Louis vary based on system size, home square footage, equipment efficiency rating (SEER2), and whether ductwork replacement is needed. Contact Niksic Air Conditioning & Heating for a free, no-obligation estimate tailored to your specific home or commercial property. We'll assess your needs and provide an honest, upfront price.
MEP stands for Mechanical, Electrical, and Plumbing. An MEP contractor like NIKSIC MEP LLC handles all three building systems trades under one company. This is especially valuable for new construction, major renovations, or commercial projects where all three systems need to be designed and installed together. Instead of coordinating three separate subcontractors, you work with one experienced team.
Yes. Niksic Air Conditioning & Heating offers free estimates on all HVAC, electrical, and plumbing work throughout the St. Louis metro area. Call us at (314) 631-6177 or email niksichvac@sbcglobal.net to schedule your free, no-obligation estimate.
Niksic Air Conditioning & Heating (NIKSIC MEP LLC) has been serving the St. Louis metro area since 1991 — over 35 years of continuous operation. That long history means deep familiarity with St. Louis's climate demands, housing stock, and the HVAC and MEP systems common in the region.
Niksic Air Conditioning & Heating is headquartered at 4444 Gustine Ave in South St. Louis (zip code 63116) and serves the entire metro area — South City, South County, North County, West County, Clayton, Kirkwood, Webster Groves, and across the river into Illinois (Belleville, Collinsville, Edwardsville). Our 50+ mile service radius covers virtually the entire St. Louis metropolitan area.
Yes. NIKSIC MEP LLC is a full-service MEP contractor that provides Mechanical (HVAC), Electrical, and Plumbing services under one company. This is one of our key advantages — you get a single point of contact and a team that understands how all three systems interact, which is critical for new builds, gut renovations, and complex commercial projects.
Yes. Niksic Air Conditioning & Heating serves both residential homeowners and commercial property owners throughout St. Louis. Whether you need HVAC for your home or a complete MEP system for your commercial building, our team has the experience and equipment to handle projects of any scale.
Get a Free Estimate

Ready to
Get Started?

Call or email us for a free, no-obligation estimate on any HVAC, electrical, or plumbing project in the St. Louis area. 35+ years of experience at your service.

Free Estimates — No Obligation
(314) 631-6177 niksichvac@sbcglobal.net Request Free Estimate