Sometimes, when replacing an HVAC system, the consultant will recommend staying with the size of the previous system — but that old system may have been sized too large. When that happens, the system tends to short-cycle — that is, it runs for a while, cuts off, and then turns back on again and again without reaching thermostat set points. This is wasteful, inefficient, and hard on the equipment.
But installing a system that is too small is no solution either, as it will run all the time. That’s more inefficiency, which will eventually wear out the parts. The best thing to do is to hire a consultant who will size both large and small AC systems using so-called Manual J calculations, which are based on the square footage of the house but also on other factors, such as the number of occupants, the orientation of the house, the number of windows, and much more. This will tell you whether or not you need small AC systems in your home.
However, there may be reasons to look into small AC systems rather than totally replacing your HVAC.
Here are some possibilities:
- Ductless mini split. These systems can be for one room or an entire house. The beauty of the mini split is it does not need ducts for distributing conditioned air. It consists of an air handler and an outdoor condenser which are connected via a conduit with wires and refrigeration tubing to an indoor air handler. The systems may have as many as four air handlers and are known for being quiet, releasing a gentle flow of air.
- Portable air conditioner. Portable units are becoming more popular as they become quieter, although they are not as mobile as the name implies. They are not terribly efficient, but they may be an option for those who can’t afford to replace an HVAC system.
- Window unit. The main drawback with a window unit can be that you don’t have the right windows to hold that type of unit. They also can be noisy, intrusive, and inefficient, although new models may come with continuous variable speed technology, which makes them quieter and more efficient.
Do you need to check out small AC systems? Contact Ace Hardware Home Services for advice.
