Before You Upgrade Get A Load Calculation
$119 Drain Cleaning Special Book Now

Before You Upgrade Get A Load Calculation


If you’re in the market for new heating and cooling equipment, it’s important to choose a system sized correctly for your needs. Load calculations can determine your heating and cooling requirements so you don’t wind up with a system that is too big or small to keep you comfortable. Incorrectly sized systems can reduce efficiency and comfort, while increasing maintenance and operating costs. Unfortunately, some research indicates that over 50 percent of contractors don’t take the time to correctly size HVAC systems for their clients.

It’s not a good idea for a contractor to simply look at your current system and sell you something similar. Until recently, when the importance of maximizing energy efficiency became apparent, many HVAC systems were installed with up to 4 times the necessary capacity. That’s why load calculation is critical to determining what size system you need.

Many factors should be considered when sizing your system, including:

  • Climate
  • The square footage and shape of your house
  • The orientation of your house (which affects heat gain and loss, depending on the season)
  • How much insulation you have
  • Room volumes
  • Assessment of the home’s air leaks
  • Number of residents
  • Comfort preferences of residents
  • Heat output and efficiency levels of home appliances
  • Your ductwork and its efficiency

It’s also important to perform a load calculation during the right season, preferably milder weather. For example, if outdoor temperatures and humidity levels are too high, it could result in oversizing the air conditioner.

Oversized equipment is not only more expensive up front, but costs more to operate, and also operates inefficiently. It may not run long enough to properly condition or dehumidify your air, making your house ripe for mold growth.

If you’ve made any home improvements to capitalize on your energy dollar, such as sealing air leaks, getting energy efficient windows, adding insulation, or even switching over to high efficiency light bulbs, it could change your heating and cooling load.

Call Roth Heating & Cooling, Plumbing, Electrical, Drain Services for a professional load calculation. We’ll ensure your new equipment is sized perfectly for your heating and cooling needs.

Industry Affiliations

Finacing Options From GreenSky - Industry Affiliations
Rinnai - Industry Affiliations
NATE  - Industry Affiliations
Noritz - Industry Affiliations
EnergyTrust of Oregon - Industry Affiliations
Roth Heating & Cooling, Plumbing, Electrical, Drain Services Car
Contact Us Today!
Complete Home Services

    Proud to service Portland, Salem, and everything in between!
    Roth Heating & Cooling, Plumbing, Electrical, Drain Services (503) 266-1249

    6990 S Anderson Rd
    Aurora, OR 97002

    Map & Directions [+]

    CCB# 14008

    DEQ# 39415