PerformanceTM Underceiling Indoor Unit

Quality Products Installed Professionally

Texas Air Mechanical has more than four decades of experience as boiler and HVAC installers. We guarantee the work we do, so you can benefit not only from our warranty, but the full manufacturer’s warranty too. If you know you need a new system for your home or business, call us today to request an estimate.


Brands You Know & Trust

Quality really does make a difference in how a unit operates and lasts. That’s why we’ve carefully chosen the brands of boilers and HVAC systems we sell and install. Our manufacturer partners include:

  • Rheem
  • Carrier
  • Trane
  • Lennox
  • York
  • Pacific Steam Boilers
  • SUSSMan Boilers
  • Reimers Boilers
  • Goodman

These names offer exceptional quality and stand behind their products with industry-leading warranties.




Why Choose Texas Air Mechanical as Your Boiler & HVAC Installers

We know there are many companies in the DFW Metro area that are boiler and HVAC installers, but few have the expertise of Texas Air Mechanical. All our technicians are licensed and factory-certified. Before we provide you with a quote for a new unit, we’ll evaluate your home or facility to determine the right type and size system. We’ll then provide you several options based on your preference, needs and budget.

You’ll find that when you choose us as your HVAC installers, all work is done in accordance with not only the manufacturer’s instructions, but also local and state code. We want to ensure that your new system is properly installed so you benefit from the full factory warranty in addition to our installation guarantee.

Because we’re locally owned and operated, we truly care about our reputation. Texas Air Mechanical is A+ rated by the Better Business Bureau, and we also have countless five-star reviews from our residential and commercial customers.


Get in Touch Today

If you’d like to request a quote, call Texas Air Mechanical to schedule your appointment. We accept most major credit cards and offer several convenient financing options for residential services. Contact us today by calling (972) 284-0584 or filling out our contact form. Se habla español.


PerformanceTM Underceiling Indoor Unit


Model: 40QAQ

  • Category Price: $$
  • Product Line: Ductless – Perfomance Commercial Series
  • Cooling Efficiency: 13.0 SEER
  • Heating Efficiency: Up to 7.7 HSPF
  • Comfort Features: Better
  • Efficiency: 13.0 SEER / Up to 7.7 HSPF
  • Application: Commercial
  • Purpose: Heating and Cooling
  • Type: Single Zone
  • Mount: Underceiling
  • Cooling SEER: 13.0
  • SEER Efficiency Range: 13 to 15.9 SEER


  • Heating HSPF: Up to 7.7
  • HSPF Efficiency Range: 7 to 9.9 HSPF
  • ENERGY STAR® Qualified: Not ENERGY STAR® qualified
  • Number of indoor fan speeds: 3
  • Sound Level: 47 decibels
  • Sound Level Range: 40 to 49 Decibels
  • Wireless Remote: Optional
  • Proposition 65 Product Warnings: 343824-2 Lead and Lead Compounds

Performance Series models offer the perfect balance of features versus price.

This underceiling-mounted indoor unit can go just about anywhere. Paired with the 38QRR heat pump, it is proven for delivering dependable heating and cooling year after year.


  • 3 indoor unit fan speeds
  • Motorized louver allows fixed or oscillating motion
  • Specific temperature setting adjustments from 62-84° F
  • Auto restart after power failure
  • Indoor sound: as low as 47 decibels1
  • Dehumidification mode
  • System diagnostics
  • 10-year parts limited and 10-year compressor limited warranties to the original purchasing owner upon timely registration2



  • Wireless remote control
  • Wired wall control
  • Extended range cooling kit

Quietest size within each model group during low fan-speed operation

If properly registered within ninety (90) days after original installation, parts are warranted to the original purchaser for a period of 10 years. Otherwise, parts warranty is 5 years. For other applications a 7-year parts and 7-year compressor limited warranties apply. See warranty certificate for details.


  • 3 indoor fan speeds
  • Indoor sound: as low as 47 decibels1
  • Auto restart after power failure



  • Diagnostics intelligence
  • Recommended controls: 53DFS250-HW programmable thermostat



  • 208-230 V


  • Ceiling hugging indoor unit in white COMPARE TO OTHER MODELS


Quietest size within each model group during low fan-speed operation.