When Does Your Ductwork Need To Be Replaced?

Ductwork comes in all shapes and sizes, galvanized metal ductwork allows the most air capacity to be delivered to your rooms per foot because it has the least friction resistance. 

Flex ductwork is easy to install but it's a treacherous road should your contractor have taken it. There are many pitfalls were simply unbeknown to many HVAC contractors on the implications of their work. Here is a short list of pitfalls Green ID's energy auditors typically find in an attic.

1. Improper size

"I'm supposed to put a 18" duct but I only have a 14", I'll just make it fit!" I feel that's a common thought HVAC contractors have when doing these horrible installs. Not only does undersized ductwork chock off your airflow, robbing your home of its full air capacity, but it makes your unit work harder and drives up your energy bills.

2. Too many wye splits.

Every wye split adds 10 feet in length to your duct runs, so after the 4th wye split don't  be surprised that the airflow is weak when your heating and cooling system needs to add an extra 40 feet of run to its load.

3. Leaks.

Arizona home performance standards require that every flex connection be sealed with mastic for a 50 year plus lifespan. If your ductwork is not properly sealed, every time the HVAC unit kicks on you are throwing money out the window by heating and cooling the attic. In homes older than 20 years duct tape may have been used as a "sealer." Duct tape may be a universal fixer of all things except when it comes to your ductwork. It doesn't take long for duct tape in the attic to become loose and its adhesive deteriorated. 

4. Evap cooler (swamp cooler).

If your home ever had a swamp cooler, the swamp cooler ductwork may still be connected to the main ductwork of the house.

Home energy saving tips with a water heater timer

Lower your energy bills with a water heater timer. APS utility rates double during peak hours in the summer. SRP energy rates almost double during peak summer hours. This water heater timer shown by energy auditor David Byrnes of Green ID can turn off during peak hours, saving valuable kWhs. In Phoenix, it's impossible to get cold water during the summer anyways so why waste energy with your water heater. Save money and live happy with Green ID.

How To Perform A Variable Speed Pool Pump Calibration & Save Money On Your Energy Bills

As energy auditors and home performance contractors we often find variable speed pool pumps that have never had a proper calibration. Although we do install Hayward and Pentair variable speed pumps because of the great energy savings realized, a post-install calibration can be performed DIY. Here are some easy steps to follow to save money on your energy bills and get the most out of your variable speed pool pump.

What is a hard start kit and does it help my air conditioner?

You may have heard your AC technician talk about installing a hard start kit on your HVAC unit and dismissed it as an unnecessary add on. Are hard start kits a scam?  The truth is that hard start kits actually help your heating and cooling unit, unlike some HVAC products. The problem is that most AC technicians aren't educated enough or understand how they work.

Hard start kits work to protect the heart of your heating and cooling unit, the compressor. The compressor is like the heart of your AC system, pumping out refrigerant at a high enough pressure for it to work its magic and keep us comfortable.  Every time the compressor starts, it has to move a large amount of refrigerant through the system.  The defect with all lower efficiency AC units is when they turn on the compressor has to work extra hard to start.  Imagine riding a bike up a hill, once you are moving, to keep moving isn't too hard but starting from a dead stop takes a lot more effort. That's what's happening every time our air conditioners turn on, they are starting from a dead stop and it wears down the compressors.  The hard start kit gives the compressor a friendly push from behind on every start so it doesn't have to work as much, and saves the compressor over time.  It allows the compressor to start faster and takes less energy to operate.

Replacing a compressor isn't cheap and can be the most expensive replacement short of replacing your entire system. By taking care of it during its life, you will extend the life of your heating and cooling system and lower your energy bills along the way. A hard start kit with a good run capacitor can reduce the inrush of energy usage by as much as 50%!  Keeping the heart of your heating and cooling unit protected also protects the other components as well which leads to less maintenance down the road.  The more an AC technician understands about your system the more efficiently it can potentially operate.

What you need to know about green energy barrier scams

While making energy saving improvements to your home is backed by both APS, SRP and the Department of Energy's Home Performance With Energy Star Program there are many unethical companies out there that are taking advantage of these programs and making a bad name for those home performance companies that are doing things right. Many of the unethical companies are using the APS and SRP program as a cover, making it appear that they follow the strict guidelines of their program by simply using their logos, mixing the solar rebate program with the home performance rebates, and taking the rebates off the top of the costs so it appears you are getting the rebate when actually it is just a smoke and mirrors trick. These companies are hurting both homeowners and home performance contractors alike.

Here are some guidelines to help you spot a phony from a real home performance contractor.

1. The company has called you from an auto dialer blast.
2. The company rep does not go past the attic hatch in their inspection of your attic (the pros know this is where the majority of your problems lie and it's not just about adding insulation or radiant barriers)
3. The company rep does not do a blower door test or a full energy audit on your home .
4. The green energy company rep is not BPI certified. This is the basic certification all energy consultants will have to know what to look for in your home and to give you energy saving recommendations based on what your home needs.
5. The company will start at a price point in the range of $20,000 for a solar/ solar water heater/ radiant barrier/ solar attic fan package.
6. The company will not perform a test-out audit with a blower door fan.

Here is what you can ask the green energy company to protect yourself from buying something that will not fix your hot and cold rooms or make your home more energy efficient.

1. The green energy companies BPI certification and make sure the energy consultant at your home is BPI certified.
2. Call APS and SRP at (602) 532-2991 to verify they are on the Home Performance With Energy Star Program.
3. Your energy consultant should talk to you about at a minimum hour air leakage, duct leakage, room pressure and duct static pressure. These are part of the required tests all APS and SRP certified companies need to do or their inspection.
4. You should complete a home performance authorization form found on APS and SRP's website.

Don't get us wrong, there is nothing wrong with solar electricity or solar hot water heaters. The danger or harm comes from homeowners thinking they are making their home more energy efficient when many issues are still left unfixed and things that were never tested for or addressed. Things like air balancing, high room pressures, high static pressure, insulation that is installed wrong, air barriers that leave the house uninsulated and overpromising the cost savings from radiant barriers.  An additional benefit to using a home performance contractor is that the utility companies will audit our work, so you have another party watching your back.

Disclaimer: Green ID's energy auditors are all BPI Certified. Green ID's founder, David Byrnes, is a BPI trainer and LEED AP professional. We do not recommend radiant barrier products without first addressing a homes' priority needs by performing a whole home energy audit.

What to ask before going solar?

Congratulations on making a commitment to a more sustainable future by reducing your electricity consumption with solar electricity.

Here are a list of questions to consider before purchasing solar panels.

What to ask for purchasing solar panels?
1. How do the APS rebates work/ how do the SRP rebates work?
2. How do the state and federal rebates work?
3. Who is the ideal homeowner to purchase solar panels?
4. Who is the ideal homeowner to lease solar panels?




What to ask for a solar lease?
1. Is it a one time payment or monthly payment?
2. Who takes over the lease if I sell the house?
3. How is the lease transferred if I sell the house?




General questions to ask before going solar
1. How long do the solar panels last?
2. How long do the inverters last?
3. What is the warranty for the solar panels and the inverter?
4. What happens if your company goes out of business?
5. What is the timeline for installation of solar?
6. How much does the efficiency of the panel really matter?
7. Why is a southern orientation the best for my western facing roof?
8. Will I be able to monitor my power output?
9. Where the solar panels manufactured?
10. How long has the manufacturer been in business?
10. Do you suggest having a BPI energy audit done on my home?

Why baffles along bird vents in your attic are a good idea

Infrared image from inside along the side of a home where the insulation has been blown back because of lack of baffles placed along the bird vents

If you have two or three bird venting holes along the outside of your roof line these are a great way to ventilate your attic along with gable ventilation on each end of the roof end.

The problem lies in that the builders and insulation contractors or any other contractor for that matter essentially do not talk to each other. That is the cause for hot rooms, poor airflow, unless art heat gain into your home and high utility bills but I digress. The lack of communication and just poor practices or laziness on part of insulation contractors is the reason why baffles or ridge vents are not placed at all the bird vents above the house.

But why are they even needed in the first place? The reason is two-fold.

1. Baffles direct airlflow up the roof slope and out the ridge vents if you have them. If you don't have baffles then the air that vents the attic will blow back the insulation a good foot or more from the sides of the house.

2. Some contractors will put a fiberglass batt in-place of a baffle because the fiberglass batt is rigid and won't blow back. The fiberglass batt insulation will allow airlflow to pass through it (as all loose fill insulation will) but there is a problem with this scenario. The fiberglass batt insulation allows hot outside air to pass through it but it does not direct the airflow up and away from the drywall ceiling. So while the outside air is passing through the batt, it is also heating the drywall which defeats the purpose of the fiberglass batt.

Baffles can be cardboard, plastic or Styrofoam material and come in 16" on center or 24" on center sizes. Expect to pay a little more for baffles especially in a retrofit situation and garages are NOT included in the square footage of your attic or in insulation quotes.