Effinity 93 (Models PTC/BTC)

Your Extended Forecast: 93% Efficiency with 100% Chance of Savings

Hydronic HVAC is pleased to introduce the Modine Effinity 93 (Models PTC/BTC), the most efficient gas-fired unit heaters in North America.

With ten propeller models available (from 55,000 to 310,000 BTU/hr) and 3 blower models available (from 215,000 to 310,000 BTU/hr), all operating at 93% efficiency, the Effinity93 will dramatically lower energy costs through decreased gas/propane consumption. For those looking to feel even more green, each unit will reduce CO2 output by roughly 13% versus comparable sized heaters.

The Conservicore™ secondary recuperative heat exchanger is fabricated from AL29-4C Stainless Steel for superior durability and has a convenient power vented capability. The PVC vent material is easy to install and extremely cost effective. Includes a contractor convenience package (standard on all units) including a service outlet, operational status lights for troubleshooting and external thermostat terminals.

Typical applications for Modine high-efficiency, condensing unit heaters - welding shops, residential garages, greenhouses, paint shops, garbage room (high-rise buildings), car washes, commercial / industrial, etc.


  • Modine’s exclusive Conservicore™ technology relieves your fear of failure thanks to its ability to withstand acidic condensate

  • A design that was made with contractors in mind for faster installation and lower installation costs

  • Product line that’s built off the successful PTS-model footprint; all Effinity93 box sizes are equal to a corresponding PTS model

  • The Contractor Convenience Package is standard on all units, allowing for easier connectivity and troubleshooting


  • Complete line of accessories to handle the condensate

  • Energy Saver Kit

  • GFCI surge protection adapter plug

  • 30, 60, 90 degree air deflector hoods

  • Horizontal and vertical concentric vent kits

  • Two-point mounting kit

  • Conversion kits for natural gas and propane, including high-altitude


Modine PTC 93% Efficient Separated Combustion Unit Heater Features:

  • Standard power exhaust simplifies side-wall or roof venting with small diameter PVC or CPVC pipe.
  • Uses 100% outside air for combustion.
  • High efficiency condensing design allows for inexpensive venting with PVC or CPVC.
  • Secondary heat exchanger is constructed with AL29-4C stainless steel – Don’t settle for anything less with condensing type unit heaters.
  • Sealed compartment protects combination gas control, ignition control, manifold and burner.
  • Horizontal or vertical concentric vent kits are available.
  • 93% Thermal efficiency.
  • Factory configured for use with propane or natural gas (please specify).
  • 100% Shut-off with continuous retry direct spark ignition.
  • Certified for commercial and industrial applications.
  • Greater durability in “hostile” environments (environments possessing substances that may deteriorate the performance of the unit)
  • External gas connections.
  • Quiet operation.
  • Durable polyester powder coat paint finish.
  • Installs quickly and easily with field wiring connections and knockouts for quick access to gas and electricity.
  • Standard power exhaust simplifies side-wall or roof venting with small diameter PVC or CPVC pipe.

Permanently-lubricated motor for trouble-free dependability.
Full 10 year parts warranty on heat exchanger, 2 year parts coverage on everything else.


Model And Description Modine | PTC135 Gas Unit Heater | Modine Effinity93 Series | Separated Combustion | Propeller Fan | Natural Gas Or Propane | 93% High Efficiency | 135,000 BTU/HR Input
Brand Modine
Energy Source Natural Gas / Propane
Voltage 115 Volts 1 Phase 60 Hertz (Step Down Transformers Are Available For Other Voltages)
Capacity 135,000 BTU/HR
Airflow 2160 CFM
Product Type Separated Combustion Gas Unit Heater
Dimensions 23.06”H x 35.53”W x 33.83”D
Gas Connection: .50″
Inlet Vent Connection: 3″ PVC
Outlet Vent Connection: 3″ PVC
Condensate Connection: 1/2″ PVC
Weight 165 Pounds
Link To Catalogs
  1. Modine PTC Modine Effinity93 Series Catalog (6-170.9)
  2. Modine Gas-Fired Unit Heaters Brochure (6-107.17)
  3. Modine PTC Effinity93 Series Distributor Brochure (80-154.7)
  4. Modine PTC Effinity93 Series Contractor Green House Brochure (80-166)
  5. Modine PTC Effinity93 Series Installation & Service Manual (6-563.10)
  6. Modine PTC Effinity93 Series Condensate Trap Installation Instructions (6-564)
  7. Good-Better-Best Gas-Fired Unit Heaters Models PDP, PTP, PTC (80-168.2)
  8. NG to LP Conversion – Models HD, HDB, HDS, HDC, PTP, PTS, BTS, PTC (75-515.5)
  9. LP to NG Conversion – Models HD, HDB, HDS, HDC, PTP, PTS, BTS, PTC (75-516.3)
  10. 2-Point Mounting Kit – Models HD, HDS, PTS, PTC (6-574.3)


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