Modine PTP150 Horizontal Power-Vented Natural Gas Unit Heater - 150,000 BTU, 115V, Aluminized Steel

The Smallest Model In Modine's PTP Series: 150,000 BTU Commercial-Grade Low-Profile Natural Gas Unit Heater For Warehouses, Workshops, And Service Bays

The Modine PTP150 (PTP150AS0111) is the entry point to Modine's commercial PTP series. At 150,000 BTU input and 123,000 BTU output (82% efficiency), it picks up where the Hot Dawg HD125 leaves off and steps into dedicated commercial territory. It pushes 2,140 CFM with a 53°F temperature rise and throws heat 51 feet from a maximum mounting height of 15 feet.

The PTP series is built for commercial and industrial environments. The PTP150 features a thicker 20-gauge aluminized steel cabinet (vs 22-gauge on the HD series), a contractor convenience box with diagnostic LEDs and disconnect switch, and in-cabinet controls protection that shields motors and wiring from airborne dust and moisture. The hinged access panel opens for fast service without removing the cabinet.

Quick Specs

• BTU Input: 150,000
• BTU Output: 123,000 (82% efficiency)
• Airflow: 2,140 CFM at 70°F
• Supply Voltage: 115V, 1-Phase, 60 Hz
• Vent Size: 4 inch
• Maximum Mounting Height: 15 ft
• Heat Throw: 51 ft at max mounting height
• Dimensions (D x W x H): 31.79 x 35.53 x 23.06 inches
• Weight: 165 lbs

Key Features

• 150,000 BTU with 2,140 CFM: The first model in the commercial PTP series. 20% more BTU and 8% more airflow than the HD125 (125,000 BTU / 1,980 CFM). This is a 150,000 BTU commercial unit heater built for spaces the Hot Dawg cannot reach.

• Low-profile horizontal design: Mounts ceiling or wall in tight commercial spaces with limited overhead clearance. The compact cabinet is installed 1 inch from the ceiling.

• Contractor convenience box: Built-in on/off toggle switch, green power indicator, yellow call-for-heat indicator, terminal board for low-voltage control wiring, and supply conduit power entry knockouts. Simplifies installation and diagnostics.

• In-cabinet controls protection: Fan motor and controls are housed inside the cabinet, shielded from airborne dust, moisture, and debris. Critical in shop, warehouse, and manufacturing environments.

• Hinged access panel: Opens for maintenance and service without removing the cabinet. Reduces service time and keeps the unit operational faster.

• 20-gauge aluminized steel cabinet: Heavier gauge than the HD series (22-gauge). More durable in commercial and industrial installations where the unit may be exposed to impact or vibration.

• Power-vented exhaust: Factory-installed power exhauster allows vertical or horizontal venting through 4-inch pipe. Maximum 50 feet horizontal vent run.

• 10-year heat exchanger warranty: Aluminized steel tubular design standard. 409 stainless steel is available for greenhouses and corrosive environments.

• Converts to propane: Ships natural gas. Modine kit #55403 converts to LP. Same burner is used for both fuels.

• Cold climate rated: Starts reliably down to -40°F. ETL certified for commercial and industrial use in the US and Canada.

Modine PTP150 Natural Gas Commercial Unit Heater Specifications

Available Options

Fuel Type:

• Natural Gas (standard)
• Propane (via field conversion kit #55403)

Ignition Type:

• Single-Stage, Direct Spark Ignition, 100% Shut-Off with Continuous Retry (standard)
• Two-Stage, Direct Spark Ignition (optional)

Heat Exchanger Material:

• Tubular, Aluminized Steel (standard, this model: PTP150AS0111)
• Tubular, 409 Stainless Steel (optional, model: PTP150SS0111)

Fan Configuration:

• Propeller Fan (PTP series, this model)
• Centrifugal Blower Fan (BTP series, for ducted applications)
• Performance Overview

The PTP150 pushes 2,140 CFM at a 53°F temperature rise, delivering 123,000 BTU output from a 15-foot maximum mounting height with a 51-foot heat throw. Compared to the HD125 (the largest Hot Dawg), the PTP150 delivers 20% more BTU (150,000 vs 125,000), 8% more airflow (2,140 vs 1,980 CFM), and a higher temperature rise (53°F vs 47°F). The PTP150 is a different product class: it is commercial-grade only, with a thicker cabinet, sealed in-cabinet controls, and a contractor convenience box that the HD series does not offer.

Included with the PTP150

• Adjustable horizontal air deflector blades
• Factory-installed power exhauster
• Contractor convenience box (toggle switch, diagnostic LEDs, terminal board)
• Gas control step-down transformer (24V)
• Fan delay timer
• Auto-reset limit control
• Differential pressure switch (proof of venting)
• Installation and service manual

Not included (sold separately):

• Vent pipe and fittings (4-inch diameter required)
• Vent cap (Modine PN 5H0722850001 for PTP150/200)
• Thermostat (any standard 24V thermostat)
• LP conversion kit (Modine #55403)
• Gas supply piping and shutoff valve
• Deflector hoods (30, 60, and 90-degree available)
• Vibration isolation kit
• Two-point suspension kit

Applications

• Warehouses and distribution centers
• Auto repair shops and multi-bay service stations
• Greenhouses and agricultural buildings (stainless steel heat exchanger recommended)
• Retail stockrooms and light manufacturing
• Commercial garages and maintenance facilities
• Workshops and fabrication shops
• Loading docks and equipment storage

Installation Tips

• Commercial and industrial use only. The PTP series is ETL certified for commercial and industrial applications. It is not certified for residential use. For residential spaces, see the Modine Hot Dawg HD series.
• Wider clearances than HD series. The PTP150 requires 6 inches on all sides (top, bottom, access, non-access) and 18 inches at the rear. The HD series requires only 1 inch on top and non-access sides. Plan for the larger clearance envelope.
• 4-inch vent pipe, max 50-foot horizontal run. The factory-installed power exhauster handles vertical or horizontal venting. Each 90-degree elbow adds 5 feet of equivalent length. Minimum 3-foot vent run required.
• LP kit is #55403. Different from the HD series kits (#53079, #53080, #53081). Same burner is used for both natural gas and propane.
• High altitude kits available. For elevations above 2,000 feet, reduce ratings by 4% per 1,000 feet above sea level. Kit #67248 for 2,001-7,500 ft. Kit #68411 for 7,501-14,000 ft.
• Minimum 7-foot install height. Bottom of unit must be at least 7 feet from the floor in commercial applications unless properly guarded.

Buy the Modine PTP150 Commercial Gas Unit Heater Online from Cleanflow

The PTP150 is the entry point to the Modine PTP series and the best 150,000 BTU commercial unit heater for buyers who need more capacity than the Hot Dawg HD125 but want to stay within Modine's low-profile horizontal lineup. It bridges the gap between Modine's residential heaters and the larger PTP200-PTP400 commercial models, combining a compact footprint with commercial-grade durability. 

Cleanflow stocks the PTP150 with free shipping on orders over $199 CAD across Canada and the USA. As an authorized Modine supplier, Cleanflow backs every unit with manufacturer warranty support. Not the right fit? Cleanflow offers hassle-free returns and exchanges on all orders.

Frequently Asked Questions

How does the PTP150 compare to the Hot Dawg HD125?

The PTP150 delivers 20% more BTU (150,000 vs 125,000) and 8% more airflow (2,140 vs 1,980 CFM). It adds commercial-grade features the HD series does not have: contractor convenience box with diagnostic LEDs, in-cabinet controls protection, 20-gauge cabinet (vs 22-gauge), and a hinged access panel. The PTP150 is certified for commercial and industrial use only, while the HD125 is also certified for residential. If you need more than 125,000 BTU or commercial-grade construction, the PTP150 is the step up.

Can the PTP150 be installed in a residential garage?

No. The PTP series is ETL certified for commercial and industrial use only. It is not certified for residential applications. For residential garages, use the Modine Hot Dawg HD series (30,000 to 125,000 BTU).

Can the PTP150 run on propane?

Yes. Ships natural gas. Converts to propane with Modine field conversion kit #55403. The same burner is used for both fuels. For propane, gas consumption is 60.0 CFH at 10" W.C. manifold pressure.

What is the difference between PTP and BTP?

PTP uses a propeller fan for direct air discharge. BTP uses a centrifugal blower fan for ducted applications. Both share the same BTU ratings, heat exchanger, and cabinet. Choose PTP for open-space heating. Choose BTP when connecting to ductwork, filter racks, or blower enclosures.

Is the PTP150 good for cold climates like Canada?

Yes. Rated for startup down to -40°F. ETL certified for commercial and industrial use in the US and Canada. CSA-B149.1 compliant. At 150,000 BTU input (123,000 BTU output), it handles large commercial spaces in extreme cold. For elevations above 2,000 feet, high-altitude kits are available.