A hanging gas heater can keep valuable floor space open while warming a garage, workshop, or other work area. The right choice depends on the space you need to heat, the available gas supply, how the heater vents, and whether you want forced-air or radiant heat. These three options range from high-capacity Reznor unit heaters to a compact overhead radiant model, so compare their installation needs as carefully as their heating features.
| Product | Heating style | Key details | Best suited for |
|---|---|---|---|
| Reznor UDXC-150 Natural Gas Heater | Forced air | 150,000 BTU; 83% thermal efficiency; vent pipe and mounting sold separately | Larger commercial or workshop spaces |
| Reznor UDXC-75 Vertical Natural Gas Heater | Forced air | 75,000 BTU; 83% thermal efficiency; vertical B-vent kit included | Spaces needing a roof-vented unit heater |
| Heatstar MH25NG Radiant Overhead Heater | Radiant | Natural gas; thermostatic control; no power needed | Garages up to about 500–600 square feet |
Availability can change. The supplied product data marks these listings unavailable, so check the current listing and included components before planning a purchase or installation.
Our Picks: Best Hanging Gas Heater For Garage reviews
Reznor UDXC-150: High-Capacity Forced-Air Heat
The Reznor UDXC-150 is a high-capacity natural-gas forced-air unit designed for indoor spaces such as garages, workshops, warehouses, and factories. Its 150,000 BTU rating and stated 83% thermal efficiency make it the largest-capacity option in this group. That capacity is a better match for a large or demanding space than for a small garage where it may be more heater than you need.
The unit has four suspension points for ceiling hanging, and it can also be used as a wall heater with the appropriate bracket. The mounting hardware is sold separately. Its listed construction includes a TCORE2 titanium-stabilized aluminized steel heat exchanger, a single-burner combustion system, a display-equipped circuit board, a built-in disconnect, and a status LED. The product description also identifies a quiet fan and low-static design.
This listing includes the heater only. A compatible category 1 double-wall B-vent pipe is specified for vertical roof venting or horizontal sidewall venting, but the vent components are not included. Plan the complete installation before choosing this model, and have a qualified professional confirm that the heater, gas supply, vent route, and mounting setup suit your space.
Pros:
- Highest stated heating capacity among these three options.
- Stated 83% thermal efficiency.
- Four suspension points support a ceiling-hung installation.
- Includes a display-equipped circuit board and status-indicating LED.
Cons:
- Mounting hardware and vent pipe are not included.
- Its high capacity may not suit a smaller garage; confirm sizing before buying.
Verdict: Choose the UDXC-150 if you need a high-capacity forced-air heater and are prepared to arrange the mounting and vent components separately.
Reznor UDXC-75: Forced-Air Heat With a Vertical Vent Kit
The Reznor UDXC-75 is a natural-gas forced-air heater rated at 75,000 BTU, with a stated thermal efficiency of 83%. It is a lower-capacity alternative to the UDXC-150, which may make it a more practical starting point for a space that does not call for the larger model. The right capacity still depends on your building and heating needs, so use a proper sizing assessment rather than choosing by capacity alone.
Like the larger Reznor, this unit has four suspension points and can be ceiling-mounted or used as a wall heater with the right bracket. The listing includes a vertical category 1 double-wall B-vent kit for venting through a roof, which is a useful distinction from the UDXC-150 listing. Confirm what mounting parts and other installation materials are included before purchase.
The heater’s listed components include a TCORE2 titanium-stabilized aluminized steel heat exchanger, a single-burner combustion system, a circuit board with display, a built-in disconnect, and a status-indicating LED. The listing describes a quiet fan and low-static design. Its included vent kit is specifically for vertical roof venting, so it may be a poor fit if your planned vent route is through a sidewall.
Pros:
- Lower stated capacity than the UDXC-150 for spaces that need less output.
- Stated 83% thermal efficiency.
- Includes a vertical B-vent kit for roof venting.
- Can be suspended from the ceiling or wall-mounted with a suitable bracket.
Cons:
- The included vent kit is for vertical roof venting, not a sidewall route.
- Mounting hardware is sold separately.
Verdict: The UDXC-75 is the more convenient Reznor choice if its capacity fits your space and you plan to vent vertically through the roof.
Heatstar MH25NG: Compact Overhead Radiant Heat
The Heatstar MH25NG is a natural-gas radiant overhead heater, rather than a forced-air unit like the two Reznor models. Its product details say it can heat about 500–600 square feet, described as a two-and-a-half-car garage. That stated coverage makes it the clearest option here for a modest garage, though the actual result will depend on your space and conditions.
The unit has a thermostatic control and does not need electrical power, according to the supplied description. Its stated mounting-height range is 7 to 9 feet, so check your ceiling height and the product instructions before planning the installation. The listing identifies it as CSA certified, but does not provide the same heat-exchanger or venting details supplied for the Reznor units.
Its radiant design makes it a different kind of choice from a forced-air heater. If you want a system with a specified coverage range and do not need the higher listed capacities of the Reznor models, the Heatstar may be worth considering. Be sure to verify clearances, gas connection requirements, and any venting or installation instructions for the exact unit before use.
Pros:
- Stated coverage of about 500–600 square feet.
- Thermostatic control is included.
- Does not need electrical power, according to the product description.
- Specified mounting-height range helps with installation planning.
Cons:
- Its stated coverage may not be enough for a larger or more demanding space.
- The supplied product details give less information about venting and construction than the Reznor listings.
Verdict: Consider the Heatstar if your garage is within its stated coverage range and you prefer an overhead radiant heater with thermostatic control and no electrical-power requirement.
How to Choose a Hanging Gas Heater for Your Garage
Match the heater to your space
Start with your garage’s size, layout, and heating needs. The Reznor options list capacities of 75,000 and 150,000 BTU, while the Heatstar gives a stated coverage range of about 500–600 square feet. These figures are not a substitute for proper sizing: ceiling height, insulation, climate, and how often you open the garage door can all affect the heater you need. Ask a qualified heating professional to assess the space if you are unsure.
Choose forced air or radiant heat
The Reznor models use forced air, while the Heatstar is a radiant overhead heater. Consider how you use the garage and which style best fits the space. Compare the product specifications and installation instructions rather than assuming the two heater types will warm the space in the same way.
Check the vent route and included parts
Venting can shape your installation plan. The UDXC-75 listing includes a vertical B-vent kit for a roof route. The UDXC-150 listing says compatible category 1 double-wall B-vent pipe can be used for vertical or horizontal venting, but the pipe is not included. The supplied Heatstar details do not specify a venting setup, so check its documentation before deciding where it can be installed.
Plan the mounting location
A hanging heater keeps the floor clear, but the ceiling structure, mounting height, and required clearances matter. The Reznor units have four suspension points; mounting hardware is sold separately. The Heatstar lists a mounting-height range of 7–9 feet. Follow the exact product instructions and local requirements, and have a qualified installer check that the mounting surface and position are suitable.
Confirm gas and power requirements
All three products are described as natural-gas heaters. Before choosing one, confirm that your property has a suitable natural-gas supply and that the heater’s requirements work with your setup. The Heatstar description says no electrical power is needed; the Reznor descriptions do not make that claim, so verify electrical requirements for the specific model.
Review safety and installation requirements
Gas-fired equipment must be installed and operated according to its manufacturer’s instructions and applicable local codes. Check requirements for clearances, venting, combustion air, gas connections, and service access before purchase. Use a qualified professional for installation when required, and do not operate a heater in a way that conflicts with its instructions.
Frequently Asked Questions
What is the best hanging gas heater for a garage?
It depends on your space and installation plan. The Reznor UDXC-150 has the highest listed capacity here, the UDXC-75 includes a vertical roof-vent kit, and the Heatstar has a stated coverage range of about 500–600 square feet. Match the heater to a proper assessment of your garage.
Which of these heaters is designed for a smaller garage?
The Heatstar is listed for about 500–600 square feet, making it the clearest match for a garage within that stated range. Check the actual dimensions and heating needs of your space before relying on that figure.
Does the Reznor UDXC-150 include a vent pipe?
No. The supplied product details say the listing includes the gas unit only. Compatible category 1 double-wall B-vent pipe is specified, but it is not included.
Does the Reznor UDXC-75 include a vent kit?
Yes. Its listing says a vertical category 1 double-wall B-vent kit is included for venting through a roof. Confirm the kit contents and compatibility with your planned installation before buying.
Can these heaters be mounted on a wall instead of the ceiling?
The Reznor descriptions say the units can be ceiling-mounted or used as wall heaters with the appropriate bracket. The mounting hardware is sold separately. The supplied Heatstar details describe it as an overhead heater and specify a mounting-height range.
Does the Heatstar heater need electricity?
The supplied product description says it does not need power and has thermostatic control. Confirm all operating and installation requirements in the manufacturer’s instructions for the exact unit.
Should I install a hanging gas heater myself?
Do not assume that a hanging heater is a simple DIY installation. Gas supply, venting, mounting, and local code requirements can be safety-critical. Follow the manufacturer’s instructions and use a qualified professional where required.
Final Recommendation
For a large space that needs substantial forced-air output, the Reznor UDXC-150 is the high-capacity pick, but plan to source its mounting and vent components separately. If you want a smaller Reznor option and a vertical roof vent suits your setup, consider the UDXC-75 with its included vent kit. For a garage within the Heatstar’s stated 500–600-square-foot range, its radiant design, thermostat, and no-power requirement make it a distinct alternative. In every case, verify sizing, availability, and installation requirements before you buy.