![]() However, installing an air conditioner that’s too large creates another set of problems. They don’t want to hear complaints about a house being too warm. The fear is that many contractors are subscribing to that old card-playing adage when it comes to HVAC unit size, “Go big or go home.” In some ways it’s understandable. No sizing decision can be made without considering these important factors: DETERMINING WHAT’S JUST RIGHT FOR YOUR HOME Determining the correct size is much more complicated. If any HVAC salesperson determines what size air conditioner to install based ONLY on the square footage of your home, you should be very leery. ![]() Let me be as clear as I possibly can: This formula is just a starting point. The rule of thumb is that it takes one ton of cooling for every 600 square feet. Yes, the process starts with how large or small a house is. In round figures it’s 12,000 BTUs for each ton. Scientists use a formula to determine how many BTUs (British Thermal Units) it takes to equal the cooling capacity of one ton of ice. It’s actually based on history when large chunks of ice were used for cooling. What does that really mean? It has nothing to do with weight. You often hear that an air conditioner or heat pump is a three ton model or a 5-ton model. ![]() Determining the HVAC unit size is absolutely critical to getting satisfactory results for the client. I’m talking about the design or load calculation phase. This article is going to focus on something that doesn’t get nearly enough attention when it comes to air conditioning homes in Waterford, MI and Oxford, MI. ![]()
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