Energy Efficiency Systems
Allegiance® 18 Ultra Efficiency Air Conditioner
Our top-of-the-line choice for cool, quiet comfort.
Significantly surpasses government efficiency standards, helping you save up to 56% on your energy bills while reducing greenhouse gas emissions*
Contains two compressors that provide two-stage cooling, running at an energy-saving 50% capacity most of the time, which may help lower your cooling bills*
Runs quietly and keeps temperature even from room to room with its variable speed fan motor
Removes unwanted humidity from the air, leaving you feeling cooler and more comfortable
Provides more efficient and reliable cooling, thanks to durable woven Spine Fin™ coil and dual Duration™ compressors
Rust-resistant coating, screws and basepan protect system from the elements
*Potential energy savings may vary depending on your lifestyle, system settings, equipment maintenance, local climate, home construction and installation of equipment and duct system.
Two-stage Heating / Two-stage Cooling
Two-stage heating and cooling is considered to be more efficient, because it operates at a low, energy-saving speed most of the time. However, on days when more heating or cooling is required, it switches to the next stage for maximum comfort.
Variable Speed Motor
The fan motor inside higher efficiency indoor and outdoor units is designed to change its speed based on your home's heating and air conditioning requirements. Working in conjunction with your thermostat, it keeps the appropriate-temperature air (e.g., warm air on cold days) circulating throughout your home, reducing temperature variances. The variable speed motor also increases dehumidification and is quiet because it runs at a lower speed most of the time. Plus, the consistent air circulation eliminates noisy startups and shutdowns.
A revolutionary technology that makes stronger, more efficient cooling coils. Spine Fin™ consists of thousands of tiny spines bonded to continuous aluminum refrigerant tubing. The tiny spines create a greater surface area, helping it to transfer more heat from your home, more efficiently. American Standard Heating & Air Conditioning features Spine Fin™ coils in our Allegiance® and Heritage® products.
Seasonal Energy Efficiency Ratio, a rating that measures the cooling efficiency of a heat pump or air conditioner. The higher the number, the more efficient the unit.