Modine PTP 300 Low-Profile Tubular Unit Heater — 300,000 BTU/hr Natural Gas Power Vented Stainless Steel

High-Output Commercial Heating for the Largest Indoor Growing Facilities — Modine PTP 300

The Modine® PTP 300 Low-Profile Tubular Unit Heater delivers 300,000 BTU/hr of reliable, efficient heat for the largest indoor cultivation facilities, commercial greenhouses, and multi-bay growing operations. Engineered for up to 83% thermal efficiency, the PTP 300 provides the highest heat output in the PTP series in the same compact low-profile design — making it the preferred choice when maximum BTU capacity is required without sacrificing installation simplicity or overhead clearance.

Equipped with a stainless steel heat exchanger and stainless steel burner for long-term corrosion resistance in humid growing environments, the PTP 300 features a factory-installed power exhauster and horizontal power venting system with small-diameter pipe for straightforward installation. Direct spark ignition with 100% shut-off and continuous retry ensures dependable cold-start reliability, while the permanently lubricated motor minimizes maintenance in continuous-operation environments. ETL certified for commercial and industrial use in the United States and Canada.

Key Features & Benefits

• 300,000 BTU/hr heat output — maximum output in the PTP series, engineered for the largest grow rooms, commercial greenhouses, and high-volume cultivation facilities.
• Up to 83% thermal efficiency — converts the majority of fuel energy to usable heat for cost-effective operation in large, continuously heated growing environments.
• Stainless steel heat exchanger and burner — superior corrosion resistance for reliable long-term performance in high-humidity cultivation environments.
• Factory-installed power exhauster — horizontal venting through small-diameter pipe simplifies installation and reduces setup costs in large facilities.
• Field-convertible to propane — fuel flexibility for facilities without natural gas access, convertible on-site without factory modification.
• 10-year heat exchanger warranty — backed by Modine's confidence in the stainless steel heat exchanger's long-term durability.
• Permanently lubricated motor — reduces maintenance requirements for reliable continuous operation in demanding commercial environments.
• ETL certified — tested and certified for commercial and industrial use in the United States and Canada.

Who Should Use the Modine PTP 300 Unit Heater

The PTP 300 is the right choice for large commercial cultivation operations, multi-room greenhouse complexes, and facility operators who need maximum BTU output in a single unit to maintain stable temperatures across expansive growing spaces. It is particularly well-suited to facilities in cold climates, large open-bay operations, and high-ceiling growing environments where 250K BTU units may not provide sufficient heating capacity to reach and maintain target temperatures under peak demand conditions.

Reliable High-Capacity Heating for Year-Round Indoor Cultivation

Large cultivation facilities present unique heating challenges — high ceilings, frequent door openings, significant ventilation exchanges, and continuous humidity management all create heat load demands that require high-output, reliable equipment. The Modine PTP 300 addresses these demands with its 300,000 BTU capacity, efficient combustion, and durable stainless steel construction — providing the consistent, programmable heating performance that keeps large-scale cultivation environments stable and productive regardless of outdoor temperature conditions.

Frequently Asked Questions

What is the difference between the PTP 250 and PTP 300?

The PTP 300 delivers 300,000 BTU/hr compared to the PTP 250's 250,000 BTU/hr. The PTP 300 also has a higher CFM range (4,460-4,545 vs 3,700-3,995) for greater air movement. All other specifications — fuel type, efficiency, venting, exchanger material, and controls — are identical between the two models.

What fuel type does the PTP 300 use?

The PTP 300 ships configured for natural gas and is field-convertible to propane for facilities without natural gas infrastructure.

What power supply is required for the PTP 300?

The PTP 300 operates on a standard 115V/60Hz single-phase power supply for blower and controls, with natural gas or propane supply for combustion.

Is the PTP 300 suitable for high-humidity grow environments?

Yes. The stainless steel heat exchanger and burner provide corrosion resistance specifically suited to high-humidity commercial cultivation environments.

How is the PTP 300 vented?

The PTP 300 uses a factory-installed power exhauster for horizontal venting through small-diameter pipe, simplifying installation in commercial facilities compared to gravity-vented or chimney-vented alternatives.