The Dog Days of Summer seem a logical time to revamp an old blog post about AC load calculations. After all, this time of year, majority of systems are well into their seasonal prime. Think home-cooling is a one-size fits all equation? Not so fast.

When it comes to unit size, it isn’t the dimensions that count, but rather the measure of power needed to deliver cool air into your home. Power, or Btus (British Thermal Units) per hour, calculate the amount of thermal a unit can add or remove from the air. With under-powered or over-powered systems, you’ll pay more and find little relief from the heat. The moral of the story: size matters.

At Sensible Heating & Cooling, we recommend purchasing an AC based on load calculation – the measurement of your entire home, including the window area. This number determines how much cooling and heating you need, while considering threats to temperature consistency, such as quality of windows and doors, type of insulation, sunlight exposure, ceiling height, etc. And guess what else? Xcel Energy requires this calculation be provided with rebate submissions.

Sound complex? Leave the calculations, variables and rebate applications to us. We’ll crush the numbers to ensure you

achieve maximum comfort and cost-savings. And while we’re at it, we’ll seal your home’s duct work to increase efficiency and ensure cool air on a sweaty summer day. Give us a call today at 720-876-7166 or email /, if you suspect your air conditioner doesn’t size up.

About Sensible Heating & Cooling

Sensible Heating & Cooling is Denver’s Premier Heating & Cooling company, offering a wealth of experience and knowledge in traditional HVAC, as well as alternative systems such as geothermal or air source heat pumps and boilers. To learn more about Sensible, visit