PTAC Buying Guide

Choosing the Right PTAC

Improve reviews. Lower costs.
Choose the best PTAC for your property.

Heating & Cooling Capacity

Ideal BTU Ranges by Room Size

Earn the reviews your property deserves. Select the ideal PTAC by matching room size with the recommended unit capacity in British Thermal Units.

  • • Ideal BTU output depends on the room size 
  • • The average 325 sq. ft. room requires 8,000 BTUs
  • • Cooler climates require more heating BTUs 
  • • Warmer climates require more cooling BTUs 
  • • Occupancy, insulation and windows effect BTU needs 
  • • Unit speeds help heat and cool rooms faster
BTU Chart
In-Room Comfort

In-Room Comfort

Give your guest a great stay and save on heating and cooling costs. Correctly sized units heat and cool efficiently, effectively and comfortably. They remove the right amount of humidity and maintain temperatures without large fluctuations or short-cycling. If you have to choose, it’s better to select a slightly undersized unit than an oversized one to ensure better humidity levels and fewer temperature fluctuations.

  • • Lower energy bills 
  • • Longer unit life 
  • • Less humidity 
  • • Less noise

Find the Best PTAC Fit


Most units come in standard size, but variations exist.

  • • Units are measured outside of the wall sleeve 
  • • 16” H x 42” W is the standard industry size 
  • • Wall sleeves are typically 20” deep 
  • • Unit depths vary, but fit most standard sleeves

Efficiency Ratings

Save on energy. Higher ratings lower your energy costs.

  • • Energy Efficiency Rating (EER) is the ratio of BTUs per hour to power input 
  • • Ideal EER ranges are 9.2 to 13.2 
  • • Coefficient of Performance (COP) is the ratio of useful heating or cooling energy 
  • • Ideal COP ranges are 2.5 to 4.0


Select the unit that fits your property’s existing electrical system.



  • • Motors are built with voltage requirements 
  • • Check the info plate for voltage 
  • • Use a multimeter if  info is missing



  • • Units will use either 208/240 or 265/277 
  • • 230-Volt PTAC units take 208/240 
  • • 265-Volt PTAC units take 265/277


  • • Check the breakers for amperage 
  • • Units will be either 15, 20 or 30 amps

Power Receptacle Configurations


NEMA6-15R; 250V receptacle, used on 230/208V units


NEMA6-20R; 250V receptacle, used on 230/208V units


NEMA6-30R; 250V receptacle, used on 230/208V units


NEMA6-20R; 277V receptacle, used on 265V units


NEMA7-30R; 277V receptacle, used on 265V units

Electric vs. Heat Pump

Determine the type of unit that’s right for your property

Electric Heat Units


  • • Better for colder climates 
  • • Use more energy 
  • • Typically lower initial investment 
  • • Quieter than heat pumps 
  • • Work well as a main source of heating

Heat Pump Units


  • • Best for mild and warmer climates 
  • • More energy efficient 
  • • Typically higher upfront cost 
  • • Better for cooling in warmer months 
  • • Regulated in western regions

refrigerant compatibility:

Check your units for refrigerant compatibility. Choosing units that accept the same refrigerant can help maximize storage space and keep costs down as you replace older units. Most units accept R-410A coolant.

Parts & Accessories

Wall Sleeves

Shop PTAC Wall Sleeves


  • • Sleeves are required for PTAC installation 
  • • Match sleeve dimensions with your unit 
  • • Most existing walls sleeve can be reused 
  • • Newer sleeves offer better sound insulation


Shop PTAC Grilles


  • • Match grille dimensions with your unit 
  • • Most existing grilles can be reused

Drain Kits

Shop PTAC Drain Kits


  • • Collects and redirects condensation 
  • • Protects areas from water damage

Remote Thermostats

Shop Thermostats


  • • Added convenience for guests 
  • • Easiest to add during construction 
  • • Occupancy sensors save energy