Modine HD60 Unit Heater

Do you need dependable warmth for a mid-sized greenhouse, garage or workshop? Then the Modine HD60 Unit Heater is the right size for the job. It’s a gas-fired “Hot Dawg” unit heater with a 60,000 BTU input. Above all, it delivers strong, steady, even heat without taking up valuable floor space. So your plants — or your projects — stay comfortable right through the colder months.

Modine has built quality unit heaters since 1916, and the HD60 lives up to that name. For example, it uses a durable aluminised-steel heat exchanger, backed by a 10-year warranty. In addition, a sealed, permanently-lubricated motor keeps it running smoothly for years, with no oiling needed. So it’s a heater you can install once and rely on for the long haul.

Why Choose the Modine HD60

The HD60 hits the sweet spot between compact and powerful. To start, it produces around 49,200 BTU of output at 82% thermal efficiency. So it warms a mid-sized space — up to roughly 50m² (550 sq ft) — economically. In addition, it moves around 990 CFM of air and throws heat up to 11 metres (36 ft). As a result, it heats the space quickly and evenly.

It’s also designed for easy, tidy installation. For example, the low-profile cabinet is just 46cm (18″) high, so it tucks close to the ceiling. Better still, it comes with the two mounting brackets included — so you can mount it 1″ below the ceiling, on a sidewall, or even leave it on the ground. In addition, the gas, electrical and flue connections can be reversed by simply flipping the unit. So it suits left- or right-hand installation. Plus, the power-vented exhaust uses small-diameter (3″) vent pipe, which keeps the install straightforward for your gasfitter.

H2: Key Features

• Mid-size 60,000 BTU input / ~49,200 BTU output gas unit heater
• 82% thermal efficiency for economical heating
• Right-sized for mid greenhouses, 3–3½ car garages, workshops and spaces up to ~50m²
• Around 990 CFM airflow with up to ~11m (36 ft) heat throw
• Quiet operation
• Low-profile cabinet — only 46cm (18″) high
• Ceiling mounting brackets included (or sidewall/ground mount)
• Direct-spark ignition with 100% safety shut-off
• Reversible gas, electrical and flue connections (left or right hand)
• Power-vented exhaust uses small-diameter (3″) vent pipe
• Finger-proof fan guard fitted as standard
• Tough aluminised-steel heat exchanger
• 10-year heat-exchanger warranty (2 years parts)

H2: Specifications

• BTU input: 60,000 BTU/hr
• BTU output: ~49,200 BTU/hr
• Thermal efficiency: 82%
• Airflow: ~990 CFM
• Heat throw: up to ~11m (36 ft)
• Maximum mounting height: ~3.7m (12 ft)
• Suits spaces up to: ~50m² (550 sq ft)
• Ignition: direct spark, single-stage
• Vent size: 3″ (~75mm)
• Heat exchanger: aluminised steel
• Dimensions: approx. 635mm D x 681mm W x 457mm H (25″ x 26.8″ x 18″)
• Weight: approx. 36kg (80 lb)
• Warranty: 10-year heat exchanger, 2-year parts
• Note: mounting brackets included; runs natural gas or (with a conversion kit) propane/LPG

Browse our full greenhouse heating and climate-control range and greenhouse accessories, or speak with our team for help sizing the right heater for your space.

H2: HD45 vs HD60 vs HD125 — Which Size Do You Need?

Choosing the right output is the key to efficient, even heat, so it helps to compare. The HD45 (45,000 BTU) is the compact option for a small greenhouse, a 2–2½ car garage or a shed. The HD60 (60,000 BTU) is the mid-size choice — ideal for a mid greenhouse, a 3–3½ car garage or a workshop up to ~50m². The HD125 (125,000 BTU), by contrast, is built for large commercial greenhouses and warehouses. So match the model to your space: too big, and it short-cycles; too small, and it struggles. Not sure? Then talk to our team for sizing help.

H2: Ideal Applications

The HD60 suits a wide range of mid-sized spaces. For example, it’s a great choice for a mid greenhouse, where steady warmth protects crops and extends the growing season. In addition, it’s well suited to larger garages, workshops, sheds and small commercial spaces. So whether you’re keeping seedlings frost-free or staying warm at the workbench, it delivers the right amount of heat — quietly and efficiently.

H2: Installation, Gas and Safety (Australia)

This part is important, so please read it carefully. The HD60 is a vented gas appliance, so it must be installed by a licensed gasfitter in line with Australian gas-installation requirements. In addition, gas appliances in Australia must meet the relevant Australian Standards and certification. So before you buy, confirm that the unit and its configuration are approved for use and sale in Australia. Please also check the electrical supply (the standard US model is 115V), and make sure it suits Australian power or that you have the correct variant. Finally, the unit needs adequate combustion-air ventilation and correct flue venting — another reason professional installation is essential.

For authoritative guidance, your state energy safety regulator (for example, Energy Safe Victoria or NSW Fair Trading) and the relevant gas technical regulator set the rules for gas appliance installation. So always check current requirements before installing. We’re happy to help confirm the right specification for your project.

H2: Frequently Asked Questions

What size space does the HD60 heat? With 60,000 BTU input and a ~11m heat throw, it suits mid-sized spaces — a mid greenhouse, a 3–3½ car garage, a workshop or an area up to around 50m².

How is it different from the HD45 and HD125? The HD60 is the mid-size model. The HD45 (45,000 BTU) suits smaller spaces, while the HD125 (125,000 BTU) is for large commercial greenhouses and warehouses.

Does it include mounting brackets? Yes. Like the other 30–75 models, the HD60 comes with the two mounting brackets included.

Can it run on LPG? It’s set up for natural gas, but it converts to propane/LPG with the correct conversion kit. So confirm the fuel type for your site.

Does it need professional installation? Yes. As a vented gas appliance, it must be installed by a licensed gasfitter in line with Australian requirements.

H2: Conclusion

In the end, the Modine HD60 Unit Heater is a dependable, efficient way to heat a mid-sized greenhouse, garage or workshop. It combines strong 60,000 BTU heating, a low-profile design with brackets included, quiet operation and a 10-year heat-exchanger warranty. Plus, with professional installation, it’ll keep your space warm for years. So browse our heating range or get in touch for expert sizing and supply advice today.