Installing a new air conditioning unit or replacing an old one requires a stable and level pad for the outdoor unit. This pad supports the AC unit’s weight and ensures efficient operation. Here’s a straightforward guide to building your own AC pad.
Materials Needed
- Concrete or pre-cast concrete pad (or materials to make your own concrete pad)
- Gravel or crushed stone
- Shovel
- Tamper
- Level
- Measuring tape
- Wooden stakes and string
- Trowel (if pouring your own concrete)
Step-by-Step Instructions
1. Choose the Location
Start by selecting a spot outside your home that has good drainage and is near where the AC lines enter the house. Make sure the area is free from obstacles like trees or shrubs that could block airflow.
2. Measure and Mark the Area
Using measuring tape, mark the dimensions of the AC unit, adding a few extra inches on each side for maintenance access. Use wooden stakes and string to outline the area.
3. Prepare the Ground
Remove any grass or vegetation from the marked area with a shovel. Dig down about 4-6 inches to create a stable base for your pad.
4. Add Gravel or Crushed Stone
Fill the excavated area with a 2-3 inch layer of gravel or crushed stone. Use a tamper to compact the gravel, ensuring a solid and level base.
5. Level the Base
Use a level to make sure the gravel surface is even. This step is crucial because an uneven base can cause the AC unit to tilt, affecting its performance and longevity.
6. Place the Concrete Pad
If you’re using a pre-cast concrete pad, carefully place it on top of the gravel base and check that it’s level. If you’re pouring your own concrete, build a wooden form to hold the concrete in place. Mix the concrete according to the instructions and pour it into the form. Use a trowel to smooth the surface, and allow it to fully cure before proceeding.
7. Check the Level
After placing the concrete pad, double-check that it is level. Adjust as necessary by adding or removing gravel underneath.
8. Install the AC Unit
Once the pad is level and secure, position the AC unit on top according to the manufacturer’s guidelines for optimal airflow and performance.
9. Secure the Unit
Use appropriate brackets or straps to secure the AC unit to the pad, preventing it from shifting during operation or adverse weather conditions.
Tips for Success
- Ensure the pad is slightly elevated above ground level to prevent water from pooling around the unit.
- Consider using a vinyl or composite pad as an alternative to concrete, especially if weight is a concern or if you prefer a recyclable option.
- Regularly check the pad for settling or movement, particularly after heavy rains or over time.
By following these steps, you can create a DIY AC pad that effectively supports your unit and helps it run efficiently. Proper installation will protect your investment and ensure your home stays comfortable during the hotter months.