HVAC Zoning and Why it Matters

Tori Klein • March 30, 2023

Zoning can be helpful in almost any situation, but why should you consider having this in your house?

Picture of HVAC systems and ductwork.

If you hire a good air conditioning company, you can be sure that they will put in a system that is the right size. The question is why this even matters.


Some common misunderstandings concerning HVAC systems exist. It's a common misconception that bigger air conditioners chill a home more quickly. When looking for a new air conditioner, it is important to consider your home's unique requirements. Sizing is crucial for any HVAC system to serve its intended purpose effectively.


Let's take a look at the significance of HVAC sizing.



What Is HVAC Sizing?


Heating and cooling loads have the opposite effect on how much work an HVAC system has to do to keep a room at a certain temperature. Sizing your home's heating, ventilation, and air conditioning system entails several measures. It takes into account things like:

  • Local climate zone
  • Square footage
  • Height of ceilings
  • Ductwork
  • Amount of insulation
  • Number and style of windows
  • Heat-generating appliances in a space
  • Number of people living in a space
  • Orientation of the house


The Manual J Calculation uses these inputs to get at an accurate estimate of the number of BTUs (British Thermal Units) required to cool or heat your home adequately. Then, the HVAC specialist will decide what size system is necessary to meet the requirements of design load, extreme load, and part load.


Importance Of HVAC Sizing


To what extent does it matter that your new HVAC system needs to be revised?


It's okay to have a little more power. Because of this, these systems can handle more work when it's very hot. The issue is that a larger unit will chill your home faster, but it will be less effective at reducing humidity or filtering the air because of its shorter cycles. This decreases air quality within your home, leaving you in a cold and damp place. Energy use is another problem that could end up hurting your wallet. There is the possibility of equipment damage due to the short cycle and the higher cost of a unit that performs less well.


There will be immediate problems if your HVAC system is too small. For one thing, it won't be able to heat or cool your house well enough. It won't do much to temper the temperature difference indoors and out during the summer, and it might be too chilly during the winter. If your HVAC system is up to the task, it will be easy to heat and cool a bigger house. This will lead to frequent malfunctions that necessitate immediate heater repair services.



On the other hand, a system that is the right size provides more thermal comfort, uses less energy to cool or heat the home, and needs fewer repairs. A system that has to work too hard to supply conditioned air will have a shorter life expectancy. Consult with a professional like us to ensure a flawless installation. You should consider your HVAC system a serious investment in your home because it is.


Save money on utilities and maintenance by making us Best Owner Direct HVAC. We offer professional HVAC sizing and installation services and emergency heating repair services. Give us a call or book an appointment with us online.

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Best Owner Direct is your local, independent, family-owned and operated, residential and commercial HVAC service, repair and installation team. We're a trade ally of the Energy Trust of Oregon and our certified professionals offer services for all major brands. With over 20 years of experience, our team can handle all of your HVAC needs.


Free estimates available for installations. Contact us today to learn more or to schedule an appointment!

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