If you start the installation in the morning, you’ll be enjoying cold air byA ceiling fan helps circulate the air and eliminate hot spots, but if the A/C unit keeps you cool enough, you can skip the fan. how to pick the right size unit for your garage and how to install it in the wall. In a hot garage, the heat and humidity slow you down, make you grumpy and increase your garage solves those problems and doesn’t cost a fortune. You can buy a TTW (through-the-wall) unit for aboutWindow units cost a bit less, so consider going that route if you have a units are the same except for installation. A window unit comes with hardware and sealing gear for mounting it in a window, while a TTW unit requires a separate sleeve that fits into a wall opening that you frame into the wall. If you plan to use your garage A/C only occasionally, you don’t have to installIt’ll just take longer to

lower the temperature to a comfortable level and the A/C compressor will run for longer periods, costing you more in electric bills. dramatically speed up the cool-down time and increase cooling effectiveness by hanging drywall on the ceiling. That reduces the size of the area to be cooled and helps the cool air circulate. Install a vapor barrier first, in case you decide to add attic insulation later on. But if you plan to frequently use the garage A/C, it’s well worth insulating and finishing the entire space. Then size the A/C unit Measure the area of your garage (length times width) to determine the total square footage, then consult theApply the adjusting factors at the bottom of the chart. shop around for the best price on the A/C unit and a matching through-the- wall sleeve (an additional $100 to the cost of a window unit). Pick a location and cut the opening

A/C units have weak circulating fans, so don’t locate one on the end wall of a locate it in the middle of the longest wall and aim the airflow toward theIf you’re installing a window unit and it’s located on the end wall of a rectangular garage, plan to install circulating fans to help move the cold air to the other end. Next, check the sleeve installation instructions for the rough openingSome manufacturers want a 1-in. clearance on the sides and top of thePlus, the distance from the ceilingDon’t place the opening directly below the top wall plate.That’ll result in rapid compressor cycling and inefficient cooling. the top of the sleeve opening about 24 in. down from the ceiling (or as shown in the sleeve installation instructions). Then remove drywall (if any) in that location to expose the studs. center stud to allow for the thickness of the new top and sill plates. task is reworking the siding.

most cases it’s best to remove as much siding as needed before cutting the opening in the sheathing and then to trim and re-side around the opening. Follow the manufacturer’s instructions to mount and secure the sleeve Run electrical cable to the location and install the receptacle. units require a dedicated receptacle on either a 15- or 20-amp circuit breaker (no extension cords allowed). sized from 9,000 to 12,000 Btu will typicallycentral ac cost india run on a 20-amp, 120-volt circuit.mini split unit wiring But you’ll have to install a 220-volt circuitac unit running but not cooling Other A/C options for your garage We didn’t cover portable A/C units in thisThey’re an option but not a very

Portable units use cold air from the room to cool the condensing coil and then exhaust that air to the outdoors. negative pressure this creates inside the garage draws in an equal amount of hot humid “make-up” air from outside. portable unit then has to cool that makeup air and the cycle repeats over and over, wasting 30 to 50 percent of the rated capacity of the unit. units don’t come close to the efficiency of a window unit or a TTW unit. If you want the very best cooling option and are willing to dig deep (expect to pay about $4,000), contact an HVAC company and get quotes on a split system. Those are heavy-duty units that can quickly cool your garage and maintain the temperature even under the hottest A through-the-wall A/C unit will dump most of its cool air right into the center of the garage, creating hot spots around the sides. uniform cooling, add a ceiling fan to

suck hot air from the ceiling corners and blow it down to the floor. floor fan on the opposite side to blow the newly warmed floor air up toward the A/C unit intake. A/C sizing for an insulated garageHome / Other Calculators / BTU Calculator The BTU Calculator can estimate the amount of BTUs you will need to heat or cool your home, based on the size and the temperature you want for your home.Please note that this calculator can only gauge a rough estimate. You should also consider factors like efficiency decrease of the heater or air conditioner with time, the shape/type of your home or room, insulation conditions, and other factors. 1 watt is approximately 3.41214 BTU/h. good (very few leakages or windows) poor (many leakages or windows) Temperature to Increase or Decrease Depending on your local winter/summer temperature,e.g. 75F for Boston winter, 35F for Atlanta winter. Free Estimation of Your Heating or Cooling Project >>Reference