Business Details
42 Years
experience
Emergency
services
Your Trusted HVAC Partner in Fenton, MO
Since 1984, Marciante Diversified has served Jefferson and St. Louis County homeowners as a trusted HVAC service provider. As a family-owned business and part of the Watson Home Construction family of brands, we combine decades of hands-on experience with a commitment to personalized service. Our licensed, insured, and bonded technicians specialize in HVAC maintenance, repair, and installation, prioritizing customer comfort and system longevity. We stand behind our work through transparent pricing, 24-hour emergency availability, and a Family Promise guaranteeing quality results. With expertise in Trane and Rudd systems, including mini-split installations, we deliver tailored solutions for residential heating and cooling needs.Our teams technical proficiency, combined with a focus on clear communication and customer education, has earned us consistent five-star reviews. We maintain industry certifications and partnerships to ensure up-to-date service standards. From routine maintenance to full system replacements, we approach every job with integrity and attention to detail. Our local knowledge of Jefferson and St. Louis County climate demands allows us to recommend systems that maximize efficiency and comfort. This combination of technical expertise, ethical practices, and community focus has made us a preferred HVAC provider for over 35 years.
Services
HVAC Maintenance
Furnace Repair
Air Conditioner Installation
Mini-Split Systems
Emergency HVAC Service
Thermostat Replacement
Ductwork Repair
Heat Pump Installation
System Diagnostics
Indoor Air Quality Solutions
Details
- Year established: 1984
Highlights and features
- 35+ years of local HVAC expertise in Jefferson County
- 24/7 emergency service with no after-hours fees
- Transparent fixed pricing for all HVAC services
- Factory-certified technicians for major HVAC brands
- Family-owned business with personalized customer service
Associations and certifications
- Trane Certified Dealer
- Rudd Certified Dealer
What people say
Prompt service
Technical expertise
Professional installations
Fair pricing
Knowledgeable technicians
Services
HVAC Maintenance
Our comprehensive HVAC maintenance includes freon level checks, airflow optimization, capacitor testing, and thermostat battery replacement. Technicians clean drains, inspect filters, and verify system efficiency to prevent breakdowns. Regular maintenance extends equipment lifespan while maintaining manufacturer warranties.
Emergency Repairs
Available 24 hours daily except Sunday, our emergency repair team addresses urgent HVAC failures. Services include refrigerant leak detection, coil replacement, and system power restoration. Technicians carry common replacement parts for immediate fixes during critical breakdowns.
System Installation
We install Trane XR15/XR16 systems, Rudd Endeavor units, and Mitsubishi mini-splits. Our process includes load calculations, ductwork customization, and REME HALO air purification integration. Installations follow manufacturer specifications for optimal performance and energy efficiency.
Mini-Split Systems
Specializing in Mitsubishi mini-split installations, we provide zoned heating and cooling solutions. Services include indoor/outdoor unit placement, refrigerant line installation, and smart thermostat integration. Ideal for room additions or homes without existing ductwork.
Indoor Air Quality
We offer REME HALO whole-home air purifiers and electronic air cleaner installations. These systems reduce allergens, bacteria, and odors through advanced oxidation technology. Improves air quality while maintaining HVAC system efficiency through cleaner filters and coils.
Questions
What HVAC services do you offer?
We provide full-service HVAC solutions including maintenance, emergency repairs, system installations, mini-split setups, and indoor air quality improvements for residential properties.
Do you offer emergency HVAC service?
Yes, we provide 24/7 emergency service Monday through Saturday with no extra fees for after-hours visits.
Which areas do you serve?
We serve Jefferson County, St. Louis County, and St. Charles County Missouri for all residential HVAC needs.
Are your technicians certified?
All technicians are licensed, insured, and factory-certified for Trane and Rudd equipment with ongoing manufacturer training.
How do I schedule service?
Call 636-282-3424 or use our online request form. Our dispatchers will coordinate same-day or next-day appointments.
What payment methods do you accept?
We accept major credit cards, checks, and cash payments for HVAC services and installations.
