Roof-mounted air conditioners offer the best possible cooling capacity. They typically require split-system features, as they cool through ductwork. Air conditioners mounted through the roof are considered convenient due to the fact that they are out of the way of any outside building or home construction and by being on the roof, the noise level is also much lower. When choosing an air conditioner unit, it's essential to look for efficiency and getting a SEER (Seasonal Energy Efficiency Ratio) model will help you to use the least amount of energy. Size is also a very important factor, as you must get a unit that provides the right amount of BTU for your home. Lastly, consider the ease of installation, as roof-mounted air conditioners typically require some amount of ductwork. According to Consumer Search both Quality Smith and Sears offer the best prices on air conditioner units. They carry a wide selection of top-quality SEER products to choose from. Both companies also offer free heating and cooling estimates.

It's best to compare both products and services through both companies, before choosing which company can offer the best deal for you. A roof-mounted air conditioning system will typically range anywhere between $1,000 to $6,000. The price depends on the amount of BTU offered and efficiency level. The larger the cooling capacity and higher the energy efficiency rates, the more money you will have to pay. However, keep in mind that SEER units will save you money in the long run, as you will save on the cost of high energy bills. Due to the fact that roof-mounted air conditioner units are exposed to direct sunlight, they can overheat, reducing its effectiveness. Therefore, it's best to place them in an area on the roof that gets the most shade and least amount of direct sunlight.For Small Rooms: General Electric AEL05LQ This 5,000-BTU window unit can cool a room up to 100 square feet and received 4.5 stars from Home Depot shoppers, who said it is a “perfect little air conditioner” and “worth its weight in gold.”

Features include two cooling and two fan-only speeds, an adjustable thermostat, and an easy-mount window kit. Related: 9 Cutting-Edge Energy-Efficient Appliances For Small Rooms: Keystone KSTAW06A This 6,000-BTU window unit cools rooms up to 250 square feet and received a 4.4-star rating from purchasers at Best Buy, who deemed it a “wonderfully inexpensive, functional product,” “quiet and lightweight,” and “great for apartment life.” Among its many features are an energy-saver and sleep mode, easy-clean filter with a check-filter alert, adjustable airflow direction, timer, and window installation kit. Related: 10 Space-Saving Solutions for Tiny Bedrooms For Small Rooms: Kenmore 70051 This 5,200-BTU, Energy Star-rated unit cools rooms up to 165 square feet and received 4 stars from Sears shoppers, who stated that it is an “excellent buy,” an “incredible bargain,” and “a lot of cool for the money.” Weighing in at a little more than 40 pounds, this machine can easily be installed by one person!

The unit features three cool speeds, three fan speeds, eight-way airflow controls, 24-hour on/off timer, sleep mode, and filter-cleaning reminder. Related: Knobs of Note: 16 Ideas for a Cool Cabinet For Medium-Size Rooms: Frigidaire LRA087AT7 This 8,000-BTU window air conditioner cools rooms up to 350 square feet and received 4 stars from Lowe's shoppers, who cited its high quality, durability, ease of installation, and quiet operation. air conditioning unit will not stop runningThe unit boasts three fan speeds, remote control, a special sleep mode, 24-hour on/off timer, and a clean-filter alert. hvac units through wall Related: 10 Ingredients for a Cutting-Edge Kitchenhow to reduce ac unit noise For Medium-Size Rooms: LG LW8012ER

This 8,000-BTU LG unit was cited as the “best window air conditioner for a medium room” by Consumer Search, which awarded it 4 stars and praised its ease of installation, “efficient cooling performance,” “quiet operation,” and “variety of features.” Along with the typical features, LG's patented Gold Fin anticorrosion coating provides a protective shield so the unit lasts longer. Related: Sweet Dreams: 15 Inventive Beds You Can Make Yourself For Medium-Size Rooms: General Electric AEM08LQ This 8,000-BTU window air conditioner cools rooms from 300 to 350 square feet, earning 4.2 stars from Walmart purchasers, who called the unit “impressive,” “great and powerful,” and “an excellent value.” The unit is Energy Star-compliant and features three cooling and three fan speeds, an energy-saver option, four-way louvers, remote control, 24-hour on/off timer, and an easy-mount window installation kit. Related: 11 Things Never to Keep in Your Bedroom

For Large Rooms: Frigidaire FRA106CV1 This 10,000-BTU model is suitable for rooms ranging from 350 to 650 square feet and was rated a Best Buy among large air conditioners by Consumer Reports, which noted its "excellent cooling performance" and its ability to "recover well under brownout conditions." The unit offers a digital display, built-in timer, auto-fan speed (which selects a speed based on the room's temperature), energy-saver mode, dirty-filter indicator, remote control, and up/down louver control. Related: Divide and Conquer: 14 Room Dividers to Bring Order to Your Space For Large Rooms: SPT WA-1211S , where users called it “very easy to install,” “quiet enough to hear the TV,” and “even better than expected.” The unit features three fan speeds, a temperature range from 62 to 86 degrees F, remote control, timer, adjustable vents, digital display, and a washable filter. Related: 8 Classic Ways to Make a Small Room Look Big For Large Rooms: Frigidaire FRA256SV2