Unit Heaters

Learn how garage size, ceiling height, insulation, doors, climate, temperature target, and fuel type affect garage-heater capacity and installation.

Unit heaters are compact, overhead heating systems perfect for garages, warehouses, and facilities with limited floor space. Choose gas-fired models for powerful, cost-effective heating in larger spaces; electric units for easy installation and zero emissions; or hydronic heaters for the lowest operating costs when you have an existing boiler system. Top picks for 2026 include the Modine Hot Dawg for residential garages, Modine PDP for commercial spaces, and Modine AMP Dawg for electric heating. HVACDirect.com offers the best selection from trusted brands like Modine, Reznor, and Sterling to keep your space warm all winter.

The Reznor EUHC Compact Electric Unit Heater delivers powerful, targeted heating in spaces where standard units won’t fit. This guide explains how EUHC models work, their pros and cons, installation flexibility, and how to choose the right size for your commercial or industrial space. View model specs, CFM airflow, and BTU ranges to find your perfect fit at HVACDirect.com.

If freezing trailers are slowing down your warehouse operations, the Reznor DTH Docked Trailer Heater offers a smarter, safer, and more efficient solution. Designed specifically for loading docks, these all-electric units direct warm air straight into the trailer, reaching comfortable temperatures in minutes while improving worker comfort and productivity. In this guide, we’ll explain how the Reznor DTH works, compare it to other heating systems, and help you choose the right model for your facility.

When you need dependable heat in your garage or workshop, only the best will do. Our 2025 picks spotlight top-performing heaters across key categories. For overall reliability and value, the Modine Hot Dawg HD30 stands out—its propane-fired 30,000 BTU output delivers quiet, consistent warmth while fitting in tight spaces and backed by a 10-year warranty on vital components. If electric is your preference, the Reznor EGW‑5 offers instant, clean heat in a compact design that installs quickly and features built-in thermostat control.

Unit heaters are a great way to heat your extra spaces that aren't connected to your central HVAC system. In this article, we will cover the most commonly asked questions about unit heaters.