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HVAC units HVAC units

Trust your local HVAC experts.

We provide professional heating services to residential, commercial, and insitutional facilities in Columbia and the surrounding counties of Rensselaer, Greene, and Dutchess.

- Gas furnaces

- Oil furnaces

- Heat pumps

- LP and natural gas furnaces and boilers

- Geothermal heating

- Rooftop units

- Split systems

- Ductless Mini-Split A/C and Heat Pumps

- Custom duct work and more!

Our heating services include:

Backed by the most experience in the business, we're able to offer you the most knowledgeable solutions for all of your heating, cooling, and refrigeration needs.


G.H. Herrmann is a factory authorized York Dealer. We are a fully insured contractor, EPA certified, and offer certificates of insurance and worker's compensation upon request.

Quality craftsmanship and service.

Emergency service available. Call now!


Proudly serving Columbia and the surrounding counties with 40 years of expertise!

A/C & Heat Pumps

Mitsubishi Ductless Mini Split System

YORK Residential & Commercial Systems

CARRIER Residential & Commercial Systems

TRANE Residential & Commercial Systems


York Package commercial roof top units

Carrier Package commercial roof top units

TRANE Package commercial roof top units

Our Major Product

Lines Include: