7 Ways You Can Save On Air Conditioning Replacement for Phoenix residents

Air conditioning in Phoenix accounts for up to 60% of a home’s annual electricity costs.  It is not uncommon for energy bills to double in the summer time in Phoenix even if a homeowner tries to manage his or her energy use by switching to the APS and SRP time of use plan, only doing laundry and running the dishwasher at night, and setting the thermostat up during the day.  Here are seven ways you cans save on air conditioning costs without spending thousands of dollars replacing your AC unit with a high efficiency unit.  


Air Conditioning Saver #1 - Leave your doors open


No, not your exterior doors but your interior doors.  Phoenix air conditioning companies have spread a lot of false information out there about closing your vents and doors.  You want all the interior doors open or at least cracked to help circulate air back to the return.  Here is a quick test you can do to check if your air conditioning costs are higher than they need to be.  With the air conditioning on close a bedroom door and place your hand under the door to check if you can feel air coming out of the door.  If you can feel air escaping, your room pressures are likely to be unbalanced every time the door is closed.  Have an APS Home EnergyAuditor or SRP Home Energy Auditor do a home performance assessment of your home to actually measure the pressure in each room to determine if correction is needed. 


What if you have teenagers or relatives are staying over or you have dogs that you don’t want in a room so you have to keep the door closed.  Your energy auditor will probably recommend a transfer grille or jump duct be installed to relieve the built up room pressure and can go over the options with you.


Air Conditioning Saver #2 - Seal the ductwork.


Between 20% to 30% of an average home in the metro Phoenix area is wasting conditioned air in the summer and heated air in the winter to the attic.  If 60% of your energy bill in the summer is from air conditioning and 20% of that air is not being delivered to the rooms it needs to go to, that can add up to quite a bit of change over 5 years.  HVAC contractors do not seal the ductwork even on a new, high efficiency air conditioner which is like driving a Prius with a hole in the gas tank.  Sealing your HVAC ductwork not only saves money on your heating and cooling bills, it brings less dust in the home too.


Air Conditioning Saver #3 - Air seal your home.


Making sure your exterior doors are well weather-stripped, air sealing any electrical and plumbing penetrations and sealing any recessed canned lights will help keep your conditioned air inside and the outside air outside.  A leaky recessed canned light can increase heating and cooling bills by as much as $5 to $30 per canned light.
Air sealing your home will also help stop the stack effect which causes warm air to rise and cool air to enter the home.  If you have a wood burning chimney, a chimney pillow will help stop heated air from escaping in the winter and save on your winter heating bills.  If you only have some areas of doors that you can see light through there are easy upgrades you can do with filler weather-stripping to fill those voids without replacing your doors.  I know what you are going to say, don’t houses have to breathe?  Yes, you need to have a supply of fresh air into your house for health and safety concerns but it is better to seal your home as tight as possible and bring controlled ventilation in from the outside than live with a leaky home and rely on dirty attic air as your “fresh air” for the house to breathe with.  An APS Energy Auditor or SRP Energy Auditor will calculate theacceptable “breathing rate” of your home and compare that number with the measured “breathing rate” or house leakiness from a blower door test.  


Air Conditioning Saver #4 - Install shade screens in the summer and remove them in the winter


Shade screens help reduce air conditioning costs by blocking up to 90% of the sun’s conductive heat through the windows.  Windows account for more than half of the heat gain into your home just because they are transparent and have almost no insulation value.  If you do replace yourhome’s windows, gas filled, vinyl windows are the way to go.  


Shade screens are typically clipped onto the frame and can be removed during Phoenix’s winter season when we use our heat to get maximum sun exposure to save on heating costs.  APS and SRP also give rebates for shade screens if you don’t already have them.


Air Conditioning Saver #5 - Go up to R-38 insulation in your attic


Is it a big surprise that Phoenix attics can get hot in the summer?  That huge temperature difference between the attic and the house is another cause of rising air conditioning costs.  Against popular thought though, the notion that the quantity of insulation is more important than the quality is completely wrong.  It is more important how the insulation was installed than how much you have and a home energy auditor will be able to properly assess your home and tell you how much higher your air conditioning bills are than they should be.


Air Conditioning Saver #6 - Check if there is a direct connection from your garage to the house.


This is not a commonly talked about cause of high air conditioning costs but I have found this problem in houses in Glendale, Scottsdale and Gilbert.  The garage is another area that can get very hot in the summer and like I said before, temperature differences are the main driver of heat gain into homes.  Using a blower door, your energy auditor will be able to test the house-to-garage connection that occurs above the drywall where you cannot see and estimate the heating and cooling loss occurring from the problem.


Air Conditioning Saver #7 - Have your air conditioning unit tuned-up annual by a trusted HVAC contractor. 


I personally know that finding a reliable HVAC contractor can be difficult.  Even though you have a friend in the air conditioning business does not mean they will do a good job.  I have been in too many homes where an AC contractor and friend installed a new unit and probably not purposely, but unfortunately cut way to many corners simply because that’s the way it’s been done for the last 20 years.  After that is done, fixing any of their work is 10 times more difficult.  First, the homeowner doesn’t want to point fingers at their buddy’s work, second the homeowner probably doesn’t know what “correct” looks like.  Like a good handyman, every homeowner should have a good HVAC contractor.


Those are the 7 ways you can reduce your air conditioning costs dramatically.  For others ways to save money on your utility bills be sure to check out our past articles and get up to speed on APS energy audits and SRP energy audits for your home.

Save energy while you cook – energy saving tips in the kitchen

Kitchen appliances can account for up to 15% of your home energy usage and how you choose to cook will impact your energy bill.  By following some energy savings tips, you can reduce your bills and here's how.

There is more than one way to skin a cat:

If you took an inventory of all the appliances you use to cook with the list might look something like this: oven, stovetop, slow cooker or crockpot, microwave and toaster oven.

As you can already guess, each of these appliances uses a different amount of energy but what is not so obvious is how much energy each one uses.  When you can choose between making a baked potato in the oven or in the microwave, which one uses less energy?  How about cooking a soup or stew over the stovetop, or using the slowcooker?  Meatloaf in the oven or toaster oven?   Just like if you lived in a smaller house, it would take less time to cool the inside of the home with the same sized AC unit than if you lived in a larger house; it takes less energy to heat a smaller space than a larger one.  So what would use less energy if you could put that meatloaf in a toaster oven compared to the conventional oven?  How much less?  You would be cutting your energy use by more than half! (and reducing the temperature in the kitchen as well).

Of course, each appliance is “specialized” to cook certain foods but when you can choose, I encourage you to do so.  Below is a table showing the energy costs of various cooking methods.

Other energy saving tips in the kitchen include:

-          When using the electric stovetops it is important to match the pan size to the element size, otherwise you will be wasting almost half the heat produced from the element.-          The ideal pan also has a concave bottom to maximize the conduction in the pan.
-          A pressure cooker will also cook stovetop items faster and with less energy because the built-up pressure drops the boiling point of water thus cooking the food faster.
-          Cleaning your appliances increases their efficiency.
-          Avoid peeking into the oven while baking.
-          Double portions when using the oven to save energy on cooking.
-          Remove foil on the bottom of ovens to improve air circulation.

Update on Tax Incentives for Energy Efficiency

The 2011 tax incentive is greatly reduced compared to last year, however there are several efforts to extend residential energy efficiency credits for measures such as water heaters, heat pumps and windows that are no longer available. Green Parent Chicago gives some great resources to keep up to date on the tax credits and I've posted a 2011 federal tax credit summary for energy efficiency improvements here as well.

How to Winterize Your Home in Phoenix

Yes, even the desert gets cold at night.  Since it can get chilly enough to wear a sweater during a Phoenix evening, here are some things you can do around home to save energy, improve your indoor air quality and be comfortable enough to walk around barefoot, even in the dead of the winter. 

1.     Seal up your air leaks

Warm air raises and can escape out the chimney of a fireplace.  A chimney pillow can be installed in the flue to stop heated air from escaping during the winter.  Just be sure to leave the tag on and remove the pillow come summer.  Also check around potential leakage “hot spots” such as old windows, doors, plumbing penetrations under sinks and electrical outlets.  By replacing old weatherstripping around the doors or caulking around the windows or plumbing penetrations you can effectively keep your conditioned air where it belongs, inside.  Check the local hardware store to find outlet sealers to add a little insulation behind light switches too.

2.     Get up to snuff with your insulation

For Phoenix and central Arizona, the DOE recommends at least 12-inches of blown-in cellulose or an R-38 value to slow the transfer of cold air into the home.  If your attic has fiberglass batt insulation, it should be in contact with the attic floor at all times to work properly.

3.     Have your furnace or heat pump inspected

A seasonal tune-up may be in order if not done annually.  If the temperatures will never reach the temperature set-point the HVAC system may be low on refrigerant or something else may be awry.  Best to have it checked by a professional.

4.     Remove shade screens

During the Phoenix winters, solar gain through windows can help significantly warm the home, lowering energy bills from decreased heat use.  Shade screens can be unclipped and stored until it comes time for summer.

5.     Stay safe

Install CO detectors if you have a fireplace or gas appliances 3-6 feet from the ground.  Use a bubble solution to check for gas leaks around fireplaces, water heaters, furnaces and feeder lines.  Be sure that the furnace or water heater has a good clearance to allow for fresh air intake and that they are not located in the same room as a dryer.

Follow these tips for a safe and comfortable winter in the Valley of the Sun.  Also check out how a typical home in Phoenix uses energy or see some tips on how to save energy.