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Why Is Furnace Sizing So Important?

Every home has different heating requirements, and therefore needs a furnace that’s the appropriate size to meet them. In this blog, residential and commercial HVAC repair contractor Schmitt shares insight on the importance of furnace sizing.

Size Does Matter

Your home needs a furnace that will supply heat efficiently, consistently and in the appropriate amount, which is why choosing the right furnace size is important. An undersized furnace will redline all the time—and consume a lot of fuel in the process—just to meet minimum heating requirements. To illustrate using an extreme example, it’s like trying to heat an entire house using a portable space heater.

Oversized furnaces can also be problematic, as they provide too much heat too fast, leading to “short cycling”. In other words, the furnace turns off and on too fast, which places additional strain on it, consumes more energy and can potentially lead to premature breakdown. The right sizing applies to both heating and cooling systems, so your air conditioner needs to be properly sized as well.

How Furnace Size Is Calculated

Your HVAC technician will take several factors into consideration before estimating the furnace size that will fulfill your home’s heating requirements:

Your Home’s Square Footage — This includes all the rooms that require heating, including finished basements and attics. Rooms vary in size and shape, of course, all of which will be taken into account.

Heating Factor — Heating as well as cooling is relative to outdoor temperatures. There are five standard zones in the United States, all with different BTU (British thermal unit) requirements. The farther from the equator, the higher the required BTUs will be. California is located in Zone 2, with a heating factor of 30 to 35 BTUs. By contrast, some of the northernmost areas in the country, such as Minneapolis, require 50 to 60 BTUs.

Insulation — A well-insulated home won’t require as much heating. In addition to wall and attic insulation, ceilings and floors in certain rooms should be insulated, and don’t forget to caulk and seal your windows and doors as well.

To calculate your home heating requirements, multiply the square footage of your house by the heating factor. The better insulated the house is, the lower the required BTUs within the resulting range. For example, if your home’s total floor area is 2,000 square feet and is well-insulated, then it will take around 60,000 BTUs to heat your home. A furnace with a corresponding output will then be selected and installed.

Call Schmitt for All Your Heating Needs

Are you looking for HVAC contractors? If so, call Schmitt Heating at (415) 689-7849 or fill out our contact form. We serve customers in San Francisco.

How to Eliminate Hot and Cold Spots in Your Home

Hot and cold spots in your home can range from annoying to downright uncomfortable. They may even place additional strain on your heating and air conditioning system, which can increase energy consumption. In this blog, HVAC contractor Schmitt takes a look at how to eliminate hot and cold spots in your home.

How to Eliminate Hot and Cold Spots in Your Home

Uneven temperatures in your home can be very frustrating, especially if you don’t know what’s causing them. These shifts in indoor temperature can manifest as hot or cold spots around your home. This blog from HVAC service company Schmitt Heating & Air Conditioning shares the most likely causes of any hot or cold spots, as well as how to eliminate issues with temperature fluctuations.

How Does Your HVAC Affect Your Skin?

When discussing skin health, the last thing that probably comes to mind is your heating and cooling systems, but you might be surprised to know that your HVAC system plays an important role in keeping your skin healthy, especially during the winter months. Residential and commercial HVAC repair specialist Schmitt takes a closer look.

4 Reasons to Prioritize Upgrades That Increase Energy Efficiency

While there are many areas of your home that may require upgrades, you should prioritize those that help improve your home’s energy efficiency. Heating and air conditioning expert Schmitt lists the reasons why such upgrades should be at the top of your list.

AFUE: Measuring Furnace Energy Efficiency

AFUE, short for Annual Fuel Utilization Efficiency, measures furnace efficiency in converting fuel to energy. Homeowners who are on the market for a new furnace or boiler will find AFUE helpful in finding the most energy-efficient heating system for their home. Schmitt shares an overview: Read more

4 Tips to Save on Heating Costs

Heating can get costly during winter, whether you use a heat pump or a furnace. Fortunately, you can do several things to make your home more comfortable all winter long and still save on heating costs. Read on as Schmitt Heating and Air Conditioning shares some tips on how you can do this:

Heat Pumps 101

Heat pump systems are designed to last for decades without needing frequent air conditioning or heating repairs. The reason behind their incredible efficiency is because unlike other HVAC systems, heat pumps move the heat around, instead of producing its own heat like boilers or furnaces.

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Top HVAC Maintenance Tips for Pet Owners

Pets are a huge responsibility with so many rewards. In addition to the companionship, they relieve stress and, for service animal owners, they help with daily tasks. They also tend to have an effect on your HVAC systems, if they stay indoors.

4 Signs You Need a New HVAC System

If you have been living in your home for a long time, at some point you will have to ask yourself if it’s time to have your HVAC system replaced. When you notice one or more of the following signs, start making preparations for a new heating and air conditioning system.