Serving Fond du Lac, Calumet, and Sheboygan Counties for over 40 years!
Office Hours
Monday - Friday
7:30AM - 4:00PM
24-Hour Emergency Service
Many More Brands and Products
— Mitsubishi mini-split air conditioning systems— Baxi, Crown, and NTI boiler systems for hydronic heat and domestic hot water
— Roth and WarmBoard in-floor heating systems design and installation
— RenewAire Energy Recovery Ventilators
— Aprilaire Humidifiers
— Honeywell Electronic Air Cleaners, zone systems and thermostats
— Carbon monoxide detectors
— Full line of pleated and non-pleated filters and humidifier pads
— Oil furnace and boilers, gas furnace and boilers, and air condi¬tioning clean and service
— Guardian Air PHI Cells — Eliminate "sick building syndrome" by reducing odors, air pollutants, chemical odors, smoke, mold, bacteria and viruses, plus add advanced oxidants throughout the house to kill microbials at the source. Backed by a 90 day money back guarantee!
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D. R. Kohlman Products and Services










