Upgrading to a new heat pump system is one of the best investments you can make in your home. Heat pumps are an ideal choice in places like Oklahoma, as they provide effective air conditioning and highly efficient heating in a single system. With a heat pump, your heating costs will be lower, and you’ll never have issues keeping cool during the summer. However, this is only the case if the heat pump is the correct size for your home. In this article, we’ll look at what goes into sizing a heat pump and why proper sizing is so crucial.
Key Factors in Sizing a Heat Pump
Many people believe that the only thing you need to take into account when sizing a heat pump system or any other type of HVAC system is the square footage of the house. While square footage is important, it is far from the only factor to consider. The local climate also plays a role in selecting a correctly sized heat pump.
There are general recommendations regarding the number of BTUs of heating/cooling needed per square foot, and these recommendations vary for regions based on climate. In climates that experience extreme heat and/or cold, you need a larger heat pump that produces more BTUs to ensure the HVAC system can always maintain a comfortable temperature.
Property Age and Condition
The age and overall condition of the house can sometimes also be a major factor. Older homes are often drafty and lack adequate insulation. That means they have higher heating and cooling requirements compared to a newer house that has a more airtight envelope and is better insulated. If a home has old single-pane windows, it will also need a larger heat pump than a house of the same size that has newer double- or triple-pane insulated windows.
Exterior Windows and Doors
The number of exterior doors and windows, their location, and skylights are also factors to consider when sizing an HVAC system. Exterior doors, windows, and skylights can contribute to heat loss during the winter by allowing cold air to enter from outside. Windows and skylights that face south or west are also major contributors to heat gain due to the amount of sunlight they let inside.
Manual J Load Calculation
When sizing a heat pump system, HVAC technicians rely on a formula known as a Manual J load calculation. This calculation takes into account all the above factors, allowing a technician to accurately determine how many BTUs the heat pump needs to produce to efficiently and effectively heat and cool the house.
Residential heat pumps range in size from 1 to 5 tons, and are available in half-ton increments. Each ton is approximately equivalent to 12,000 BTUs. If a house’s BTU requirements fall in between two sizes, it’s always best to round up to the higher size. If you round down, the heat pump will struggle more to maintain the house at your desired temperature whenever it’s overly hot or cold.
The Importance of Proper Heat Pump Sizing
Installing a heat pump typically costs anywhere from $6,000 to $25,000, depending on size, brand, and efficiency. If you install a heat pump system that is too small for your home or larger than you need, you’re basically wasting money. An undersized heat pump will have to run much more and work much harder to heat and cool your house, resulting in higher energy bills than they would be with a properly sized system. It will also be more prone to breaking down, need more repairs, and have a shortened lifespan.
While you might be tempted to think that bigger is always better when it comes to a heat pump, this isn’t the case. For starters, the larger the heat pump is, the more it will cost and the more energy it will use. Oversized heat pumps also typically have issues with short cycling, which means they only run for a few minutes and then turn on again fairly quickly after shutting off. Short cycling always leads to higher cooling and heating costs because of increased electrical use. Constantly turning on and off is also extremely hard on the motors, which is why oversized heat pumps usually fail much faster and break down more frequently.
Trust The Heat Pump Pros for Help!
TS Heat & Air has been providing quality, dependable cooling and heating services in Bethany and the OKC Metro area since 1983. We specialize in heat pump installation and offer a range of efficient options from trusted brands like Lennox. Our experts can also provide repair and maintenance to ensure your HVAC system is in excellent condition. To schedule service with the area’s leading HVAC company, contact TS Heat & Air.
