AFUE Explained


Many CPS Heating & Cooling customers have shown curiosity about the efficiency of their current or future heating and/or cooling system so today we’ve chosen to write a brief post to explain the terminology and your efficiency options so you feel more confident and informed when speaking with your technician.

First and foremost, it is important to know that Annual Fuel Utilization Efficiency (AFUE) is a thermal efficiency measure for combustion HVAC equipment like furnaces, boilers, and water heaters. This type of measurement is extremely accurate because it represents a season-long understanding of efficiency as it relates to outside factors such as weather — rather than simply representing the short-term ability to run efficiently in ideal conditions.

The standard for efficiency is 80% AFUE, but by no means a glass ceiling. This level of efficiency usually means that the flue vents back into a chimney through metal flue pipes in gas or oil systems. This is a great starting point, and if you are concerned with the upfront cost of your system this is the AFUE we would recommend.

High efficiency systems, on the other hand, measure at 90-96% AFUE. This level of efficiency is created by flue vents with PVC plastic pipes through the side of the home and will generate water during the heating season. It burns the moisture out of the combustion air and brings it into the heating system in gas systems. This process is more advanced and a system that runs this way may cost more upfront. On the other hand, over time you will save money on your heating bill and decrease your carbon footprint. If you can afford this system we would definitely recommend this level of efficiency. Who doesn’t want to save money and save the environment while they’re at it?

It can be difficult to decide what efficiency is right for you and your family on your own. Factors such as current and future budget, the age of your home, and other considerations can be challenging to sort through without a professional. If your have any questions contact us today or visit our website for more information!

CPS Heating & Cooling



AFUE Explained 2018-02-13T15:19:47+00:00

Beautiful Air Conditioning Units

Is there a “beautiful” air conditioning unit? No. Here’s how to solve the problem.

A complete home is a balance of comfort, practicality, and aesthetic appeal. This is as true for your home’s heating, cooling and air quality system as it is for your furnishings and decor.

Coordinating the efficiency, price, and place within your home for an HVAC system is a delicate and sometimes tedious process. A home comfort expert — such as those on the CPS staff — can help you find the system that matches your ductwork, comfort needs and budget.

But how about aesthetics? Unfortunately, your air conditioning condensing unit can be the most unsightly part of your home or garden. It is often tempting to try to conceal it to blend in with the aesthetic of the rest of your home.

There are lots of ways to “screen off” an air conditioner from view. Take a look at our Pinterest board for ideas on how to do this. But remember, it is important to keep a close eye on a few details to ensure that your unit continues to run safely.

Air conditioning condensers are complicated components; covering them can sometimes block air flow. If you have a ductless split cooling system, the air handler must be left out in the open on the wall. This is because the ductless split air handler is designed so that it takes air in from the top of the unit and blows air out the bottom of the unit. If this influx and outflow of air is hindered in any way, the system doesn’t run at optimum efficiency and ends up having to work harder in order to bring the room to temperature. This can also cause the condenser to heat up to unsafe temperatures.

To prevent these risks, make a point of keeping the indoor air handler at a minimum of 6-8 inches from other objects.

As always, if you have any questions we would be happy to take your call (508-460-6691). We are also reachable by email (info@cpshvac.com). If you need some inspiration for HVAC cover-up ideas, we have tons of tips we’d love to share with you!

Beautiful Air Conditioning Units 2017-06-02T10:11:28+00:00

Can a high efficiency furnace be installed in my attic?

Perhaps the first thought that crosses many minds when it is time to install a furnace — particularly when replacing a small antiquated unit with a new, high-efficiency one — is a question: “Where am I going to find the room to put it?”

Most people choose the basement or a closet, but if either of those spaces do not present themselves as ideal then other options need to be found.

It turns out that for many homes, a very convenient place to place a furnace is in the attic. There is a common misconception that this is not possible for high efficiency furnaces. Not so! There are rarely instances when we will advise against an attic installation.

The trick to the installation of a gas furnace in an attic space is routing the condensate drain from the attic down through the core of the house to the basement. This drain removes the excess water that a heating system will generate. The drain must be installed through the core of the house — as water will be flowing during the colder months. If the drain is located too close to the outside of the home it may freeze in the coldest of winter weather.

If an attic installation is possible in your home, it can be a great option for many homeowners. But please, use a top-notch contractor! We have seen too many poorly installed draining systems and have been called on too many emergency calls for cracked units and tubes due to freezing.

The installation team at CPS has a variety of products and services that can find the best fit for you and your family. If you have any questions feel free to contact us online or by phone (508-460-6691).

Can a high efficiency furnace be installed in my attic? 2017-02-15T18:03:31+00:00

Gas Boiler Upgrade in Marlborough, MA

CPS recently installed these two 96% AFUE gas boilers in a multi-family in Marlborough MA
Efficient Gas Boilers
Click to view larger image

These 78% AFUE gas boilers were recently replaced by the 96% AFUE gas boilers above
inefficient gas boilers
Click to view larger image

What is AFUE?

Gas Boiler Upgrade in Marlborough, MA 2017-04-14T10:57:06+00:00