Today marks the beginning of a journey in the pursuit of understanding. Welcome to our new and humble little blog here at Reasonable Air, LLC! The purpose we’ve set forth in this endeavor is to provide relevant information and insight about different HVAC topics: such as the type of equipment available in our current market and the pros and cons of utilizing particular systems. RALLC values you as a customer and as your trusted HVAC expert, wants to arm you with the best tool we can–knowledge. So, let’s get it!
Manufacturers generally offer 3 types of equipment: single-stage, multi-stage and variable-speed (or modulating) units. For the purpose of simplicity and ease of installation, the majority of residential owners are requesting single-stage systems. These are adequate in low humidity climates, especially where extreme high or low temperatures are not common. Ideally, the basic single-stage equipment will also be the most economically priced, as well.
In pursuit of having a smaller energy consumption footprint, the multi-stage systems are now becoming more popular. These systems can provide more efficiency, quieter operation and better humidity control and comfort due to longer run times. These systems can range from 2-speed units to multi-speed set ups capable of seven different operating speeds. We are seeing much government support for this category of unit and often federal rebates, which can offset costs or energy provider rebates (as with Dominion Energy) can be attained with the installation of multi-stage equipment. These systems often require communicating thermostats, which can also be more costly to purchase. While not greatly a factor with single-stage equipment, there is a pressing aspect to consider when installing multi-speed systems that provide variable-speed indoor airflow–duct work. Proper sizing of the air distribution piping (duct work) is important. Improper duct sizing can result in moisture problems with ducting in hot or cold areas. Excessive condensation can occur and lead to mildew, mold and even wood rot. With this in mind, the multi-stage system may require improvements or reconstruction of supply and return ducting in order to properly feed air to the system. Check federal guidelines to see what rebate options are available for ducting improvements when researching your replacement project. You can access that information via our website as well, www.reasonableairofsc.com/pay-financing-rebates.
Finally, you also have the option of a modulating heat pump system that does not require communicating thermostats or variable-speed airflow. This makes for a better price point on equipment and thermostats and provides more flexibility in terms of equipment choice. The modulating heat pumps are quite efficient and quiet. They can be paired up to many different indoor units/furnaces and do not normally require extensive ducting modification, making them quite a viable option in many cases. The one issue that could arise is dehumidification due to the constant indoor airflow. On mild days, the outdoor unit will run at lower speeds which can result in mediocre dehumidification. Because of this, modulating systems may be a less optimal option, in some climates.
The type of system a homeowner chooses can have a great impact on the comfort level and indoor air quality of their home. We encourage you to ask questions–to assess the need for ductwork modification and for best air conditioner options available–to ensure maximum comfort and efficiency. Choosing a reputable, licensed contractor to install and maintain the heating and air conditioners for any homeowner is at the top of the to-do list. We hope this brief overview has been helpful and if you still have questions, we’re here for you! Contact us via email at contactus@reasonableairofsc.com, our website at www.reasonableairofsc.com or phone at (843) 900-4799. We look forward to bringing you more HVAC news as well as, “castle comfort…at reasonable rates”!