Business Details
42 Years
experience
Emergency
services
Your Trusted HVAC Partner in Fenton, MO
Since 1984, Marciante Diversified has been a trusted provider of HVAC services for homeowners in Jefferson and St. Louis County. As part of the Watson Home Construction Family of Brands, we combine decades of experience with certified technicians to deliver reliable heating, ventilation, and air conditioning solutions. Our team prioritizes customer comfort through 24-hour emergency support Monday through Saturday, transparent fixed pricing, and a commitment to resolving issues on the first visit. We specialize in maintenance, repair, and installation of systems from leading brands like Trane and Rudd, ensuring long-term efficiency and satisfaction. With over 35 years of local expertise, we focus on protecting your home investment while maintaining exceptional service standards.Our licensed, insured, and bonded professionals consistently earn praise for their attention to detail, clear communication, and respect for client properties. From routine checkups to full system replacements, we deliver personalized solutions tailored to individual home needs. Our Family Promise guarantees quality workmanship, supported by partnerships with industry leaders like Mr. Rooter and Mr. Electric. Customer testimonials highlight our responsiveness, fair pricing, and the professionalism of technicians like Vito, Mario, and Margie. For generations, we have built trust through consistent service excellence and a deep understanding of regional climate challenges.
Services
HVAC Maintenance
Air Conditioning Repair
Furnace Installation
Mini-Split Systems
Air Quality Solutions
Details
- Year established: 1984
Highlights and features
- 35+ years of local HVAC expertise
- 24-hour emergency service Monday through Saturday
- Transparent fixed pricing with no overtime fees
- Certified technicians for Trane and Rudd systems
- Family Promise guarantee for first-time repairs
Associations and certifications
- Trane Certified Dealer
- Rudd Certified Dealer
What people say
Speedy response after hours
Outstanding attention to detail
Respectful, honest team members
Fantastic installation quality
No hidden fees
Services
HVAC Maintenance
Our comprehensive HVAC maintenance includes freon level checks, airflow optimization, capacitor testing, and thermostat battery replacements. Technicians clean drains, inspect filters, and verify system efficiency to prevent breakdowns. Regular maintenance extends equipment lifespan while maintaining energy efficiency and indoor air quality for residential clients.
Air Conditioning Repair
We diagnose and repair AC issues including refrigerant leaks, noisy components, and electrical malfunctions. Our team replaces defective coils, motors, and compressors while clearing condensate drains. Emergency repairs prioritize restoring comfort during peak summer temperatures with same-day service availability for critical failures.
Furnace Installation
As Trane and Rudd certified dealers, we install high-efficiency furnaces and heat pumps tailored to home specifications. Our process includes system sizing analysis, ductwork evaluation, and proper venting configuration. New installations feature ENERGY STAR qualified models that reduce utility costs while improving winter comfort reliability.
Mini-Split Systems
We design and install Mitsubishi mini-split systems for targeted heating and cooling in specific rooms. These ductless systems offer zoned temperature control with wall-mounted units. Ideal for home additions or spaces without existing ductwork, installations include proper refrigerant line routing and electrical connections for optimal performance.
Air Quality Solutions
Our REME HALO whole-home air purifiers eliminate allergens, bacteria, and odors through advanced oxidation technology. We integrate air cleaners with existing HVAC systems to improve respiratory health for allergy sufferers. Solutions include HEPA filters, UV light systems, and humidity control options for balanced indoor air quality.
People
Mario
System Consultant
Mario specializes in explaining HVAC system operations and recommending solutions tailored to home specifications. With extensive product knowledge, he helps clients understand efficiency ratings and system compatibility for informed decision-making.
Margie
Scheduling Coordinator
Margie manages service appointments and communicates project timelines to ensure timely technician arrivals. Her organizational skills maintain efficient workflow while addressing client scheduling preferences for service visits.
Vito
Lead Installer
Vito supervises HVAC installation teams, ensuring precise equipment setup and daily worksite cleanliness. His technical expertise guarantees proper system configuration and adherence to safety standards during full replacements.
Questions
What HVAC services do you offer?
We provide full-service HVAC solutions including maintenance, repair, and installation of heating, cooling, and air quality systems for residential properties.
Do you offer emergency HVAC service?
Yes, we provide 24-hour emergency support Monday through Saturday for urgent heating and cooling issues.
Are your technicians certified?
All technicians are licensed, insured, and certified for Trane and Rudd systems with ongoing manufacturer training.
What areas do you serve?
We serve Jefferson County, St. Louis County, and St. Charles County Missouri for all residential HVAC needs.
Do you offer system replacement financing?
While not explicitly stated, we recommend contacting our office to discuss payment plans and financing options for major HVAC replacements.
What brands do you work with?
We specialize in Trane and Rudd equipment as certified dealers, offering installation, maintenance, and warranty support for these systems.
Reviews (4)
Brian Mayer
Sep 03, 2021
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Positive:Professionalism,Punctuality,Quality,Responsiveness,Value
Called and they were there the next day to install. Very friendly & professional. Will use for future projects.
Service:AC installation
Called and they were there the next day to install. Very friendly & professional. Will use for future projects.
Service:AC installation
Pam Wilson
Aug 04, 2021
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Positive:Quality,Value
What an amazing company! From the minute I first called and spoke with Margie I was impressed with their professionalism and care of their customers. They kept me in the loop about my appointment. The technician was patient and explained and brainstormed with me. Thank you for your customer care!
Service:AC maintenance
What an amazing company! From the minute I first called and spoke with Margie I was impressed with their professionalism and care of their customers. They kept me in the loop about my appointment. The technician was patient and explained and brainstormed with me. Thank you for your customer care!
Service:AC maintenance
Kimberly Vester
Jul 27, 2021
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If you want a friendly reliable company Marciante is the heating and cooling company for you! Margie is the first person you talk to when you call! Shes AWESOME! And if you get Ken the service tech your getting the BEST! He is so knowledgeable! He finds the problem and fixes it! No hassle or fake problems. This company is so honest! Give them a try you will be impressed with their service! I highly recommend them! Thank you for your Awesome service! I will tell everyone I know about your company!
Richard Fisher
Jul 25, 2021
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Recently used Marciante Diversified complete a full furnace and AC replacement project. While I was drawn to them because of the highly rated Rheem equipment, the entire team won me over. Mario is fantastic at explaining how a system works and what makes sense your home. Margie is great at communicating, especially with scheduling. And the installing team led by Vito did a fantastic job, left our home clean each day, and did a fantastic job. Highly recommend you reach out to them for any work you may need done.
