Polyurethane spray foam is a type of insulation that has been growing in popularity a lot throughout the last few years. People have been flocking to this product because of its many benefits which include its quick application, resistance to harsh weather and diverse climates, everlasting density, and it’s quick payback in energy sayings compared to other types of insulation. Within this spray foam family are two types of sprays: Open cell and closed cell.
Open cell spray foam can be identified by is fuller body compared to closed cell spray foam. This fuller and lighter body is caused by the material expanding once applied to a surface. This quality makes this insulation great for hard to reach places. This type of spray foam has a R-value of about 4.21 per inch. Open cell spray foam is the less common type of polyurethane insulation.
Closed cell spray foam can be identified by its denser and thinner body. This type of insulation does expand, but only slightly compared to the open cell option. Because it is fairly dense its R-value is quite high at about 6.7 per inch. Closed cell polyurethane has a higher resistance to extreme cold temperatures and moisture build up as well. It is the more expensive and more commonly used spray foam insulation.
Both of these polyurethane spray foams have their advantages. In fact, after reading through the specifics, you may have a clear winner in your mind but the truth is that all homes and areas are different. The biggest component of your decision should be what the design of your home and your climate requires. Green ID serves Phoenix and the surrounding valley and because of this, we don’t experience extremely low temperatures and there’s typically no moisture to deal with.
At Green ID we almost always use open cell spray foam unless there is a space restriction of some sort. For example, we will use closed cell polyurethane spray foam in block walls or when injecting foam into the exterior wall. Closed cell spray foam is typically better but costs twice as much and because of our unique climate here in the valley of Arizona, it’s actually preferable to use open cell spray foam insulation on your home.
Have more questions on the differences between the two? Leave a comment below or reach out to use at 602-926-1650.
.Call Us To See How You Can Recieve Up To $4,000 In Rebates
Trane kicked off their Fall promotion offer. From now until November 15th 2016 you can get up to a $2000 instant rebate on trade-in on a qualifying purchase of a new Trane system! The promotional period is a great to to replace your old system at your own convenience, not when the unit stops working during the hottest part of the day. Air conditioners in Phoenix tend to break down in the middle of the summer and air conditioning companies tend to charge more on emergency calls.
A proper analysis of your home is the first step. Performing a load calculation and energy audit and finding issues and concerns you have allows us to design a system together that will improve comfort, energy bills and peace of mind.
Trane Current Rebate Promotion Details
1. Choose a complete heating and air conditioning system from Green ID.
2. We will electronically enter your information and SEER for units purchased into the Big Game contest site.
3. Then just “scratch” to reveal your savings!
To determine the appropriate trade-in allowance, Green ID will help determine specific qualifying systems tailored for your needs. Then, visit Trane's website with your Green ID consultant, to electronically scratch and win. Your rebate will determined by the SEER, or efficiency rating of the system you choose. The higher the SEER, the more efficient the unit will be and less you'll spend on energy costs. SEER ratings vary from SEER 14 to SEER 20 and the rebate will be multiplied by the SEER of the unit you choose. The homeowner will scratch off savings of either:
Your rebates will come off the top of your AC unit cost and we will submit all the paperwork on the back end. The Trane rebate savings are calculated by multiplying the SEER rating of your unit with the dollar amount of your scratch-off. For example: If you’re purchasing a unit with a SEER rating of 16 and you scratch off $75, your rebate. Savings are calculated by multiplying the SEER rating of your unit with the dollar amount of your scratch-off. For example: If you’re purchasing a unit with a SEER rating of 16 and you scratch off $75, your rebate will be $1,200 (16 x $75 = $1,200).
Green ID will then double your rebate to add on to Trane's promotion up to $4000 total to help make your new AC even more affordable until the end of November.0% Financing Available0% financing for 48 months is available for qualifying Trane variable speed units or Green ID offers alternative financing for homeowners purchasing new AC systems.
There are incredible advancements in air conditioning in just the last few years. Read about the Trane XVi20 variable speed systems. If you notice rooms that are hard to cool in the summer or high energy bills, this is a great time to take advantage of Trane's specials and make your home comfortable and energy efficient. Call Green ID at 602-926-1650 today to lock in your Trane rebates.
When temperatures soar, the natural inclination is to reach for the thermostat. But this can also trigger an out-of-control power bill. Before you crank up the air-conditioning to keep your bedroom cool, consider these tips to beat the heat without busting your energy bill budget.
A box window fan can help cool your bedroom, but only if used properly. If it’s cool outside, face the fan to blowing inwards to pull in the cooler air. If it’s hotter outside than in, face it to blow out to suck warm room air from the window. If you have a ceiling fan, set it to rotate counter-clockwise and run at a higher speed. It’ll suck warm air up and towards the ceiling away from you sleeping in the bed.
Leave some space
If you and your sleep partner are cuddlers and love to spoon, you might want to rethink your sleep posture on hot nights. Make sure you have a good quality mattress with no sags so that you won’t roll in towards each other. Bodies close to each other in bed are like kindling in a fire. Place a pillow between you so you won’t end up touching. That alone can give you a much cooler sleep experience.
Close the drapes
When you keep your room cooler all day, it’ll naturally be cooler at night. That means closing your curtains and blinds. Single pane windows lose 12-30% more heat than double-paned glass, so if you have basic windows, closing the drapes blocks sunlight that will heat your room. After dark, you can open them to catch any cool night breezes. Also, consider upgrading your windows.
Switch to seasonal bedding
Just as you swap your wardrobe from warmer to cooler options when the seasons change, do the same for your bedding. Some sheets and blanket materials are better suited for Fall and Winter. In hot months, bamboo sheets and bedding are cooler. Avoid polyester and other synthetics. Microfiber and moisture wicking smart fabric are other top hot weather bedding choices.
Invest in cooling upgrades
If your bedroom is on the top floor, extra insulation between the roof and your room can cool it down. If your attic is a hot zone, an attic fan can cool the bedroom and whole house. If you don’t have energy-efficient windows and don’t want to install them now, you can use plastic film to seal the windows and prevent heat transfer in hot months. Consider planting a shade tree outside the window.
Adjust your body temperature
Humanity has lived most of its span without the benefit of AC, so you can cool your body in addition to cooling your room. Don’t eat large meals. Stay hydrated and avoid caffeine and alcohol. Choose loose moisture-wicking or natural fabrics. Go barefoot and avoid hats indoors. Apply cold compresses to the wrist, temple, and neck to trigger the hypothalamus to cool your body.
If you’re committed to lowering your energy consumption and costs, with a few thoughtful changes, you can achieve a cooler bedroom. Remember, you might need to experiment and see which works best for you and allow your body time to adjust to the new reality of not relying on air conditioning for comfort.
Amy Highland is a sleep expert at SleepHelp.org. Her preferred research topics are health and wellness, so Amy's a regular reader of Scientific American and Nature. She loves taking naps during thunderstorms and cuddling up with a blanket, book, and cats.
Going solar is perhaps the the largest expression of energy independence, sustainability and energy savings homeowners can do. If you have solar power or have ever considered going solar, it's also important to consider how the utility companies feel about photovoltaics because unfortunately, installing solar alone is only considering half of the bigger picture.
As solar power customers, do you know what is happening in Arizona that could affect your savings? Most solar power users intend to use solar power as a way to save money, but this could be changing as the Arizona Corporation Commission members set rates and other policies for power companies. APS and SRP may seem like they are favor of solar power, but but have been quietly working to kill solar by taking away rebate incentives, forcing demand based energy plans and killing pro-solar bills at the State level. These changes directly affect your energy bills. We have seen homes with full solar that should satisfy 70% of their summer energy bills be hit with $300-$400 bills because of demand charges.
No matter how APS and SRP dance around the cons of solar, residential solar directly takes away their business of selling electricity. When a homeowner has solar equipment and produces most of their own energy, they take away the bulk of their business from the power companies. This means that non-solar customers are the ones supporting the majority of the power grid. The power companies want the non-solar customers to pay the excess that is not being paid by the solar customers. The companies claim that rate hikes are necessary to keep them in business, but what amount should non-solar customers be expected to pay, and are the companies being fully transparent about rate hikes?
AZ Central reported that “APS described the rate hike last year as averaging 4.5 percent on residential customers” and "raised their bills and average of “$6 per month”. Although, customers have found their bills to be significantly higher than the figures APS described. When we compared APS's new vs old rate plans, we found an average of 56% increase.
A View From Non-Solar Customers
On the non-solar side, customers should not necessarily be penalized for not using solar energy, because they are the ones largely supporting the grid. If the number of non-solar customers continues to dwindle, then the cost will fall on those than cannot or will not switch over to solar. These customers may not want to switch due to factors such as renting the property that they purchase power for, or their distaste for the look of solar panels on their property.
A View From Solar Customers
On the solar side, customers may be paying more for the power they do not generate themselves. Typically the solar equipment produces the majority of the power they use, but any extra power must be purchased from the power companies. The rate hikes makes it so that they might not be saving enough money to make their lease of the solar equipment worth it (Phoenix New Times, 2013). Solar power is still an attractive investment because as of now and for the next several decades it will continue to save residents money. It will also provide benefits for people who are interested in environmental sustainability or people who want to go off the grid completely.
The important action point now is to be aware of what the power companies are trying to accomplish and how it affects non-solar and solar customers alike. The power companies ultimately want to be able to make money, and their main way of achieving this objective is raising the rates. It will be important as the ACC begins to discuss this topic that the rates set do not hurt solar customers for choosing an option that proves more sustainable, but also does not severely impact those still directly tied to the grid.
Do you notice one room just doesn’t cool like the rest of the house... that one room remains uncomfortably hot even if you have the air conditioner blasting down to 74 degrees?... Temperature differences in homes are a common occurrence but can be difficult to find the cause and solution. Typically a specialty contractor like an air conditioning company, insulation or window company is called out and their one and only solution is to offer their product as the fix. This approach rarely works because while those companies are knowledgeable about their specific products, finding the cause of the single hot room involves a deeper knowledge of all the systems in your home and how they work together.
For example, let’s say you keep your bedroom doors closed and notice a good amount of air blowing out under the door when the air is on. You have 10” of insulation in your attic, but where you are from in the Midwest, 18” is code so you think your current levels are too low. An air conditioning contractor may tell you that another supply register in the room will help to deliver more air to the room and keep it cool. An insulation contractor will recommend more insulation but doesn’t sound too convincing because he himself believes that you won’t see much of a difference, he just cares about his commission. A window company will tell you how durable and seal tight their windows are, even though your windows are on the east side of the house and get only the morning sun, he is convinced his product is the best on the market and even has special discounts and financing available. Tackling the hot room problem like this is like looking for a boat at the airport.
What an energy audit would discover by measuring the room pressures is that the airflow in the room needs a place to escape first, and that just like blowing air into a bottle you can’t blow any more air in the bottle unless you let some out. The room is getting hot because the cool air can’t get in until more is able to escape and circulate back to the return. Following the air conditioning contractor’s advice, adding another supply register will only worsen the problem. Following the insulation contractors advice additional insulation won’t have a big impact if you have more than R26 existing but they won’t tell you that. Nor will the window rep mention that your window is not the major cause of your room getting hotter than others… say it together, “it takes a whole home approach.”
That said here are the top 5 causes an energy auditor might recognize that would cause your one room to be getting hotter than others in the summer. See what we can do for you with our $49 energy audit special by calling our office today at (602) 926-1650.
Bad Duct Design and Installation
It’s obvious when the hottest room in the house is the furthest away from the unit because the cold air has to travel far to reach its final resting place. But what about rooms that are close to the air handler, why would those rooms be hotter than others? Again we can likely blame a bad duct design. Either too many wye splits, bad placement of the other ducts off of the supply plenum, kinks, or ductwork leakage can throw the airflow out of balance and cause a hot room. A duct design perfectly installed per design specifications can still have major flaws just like a perfectly designed system but poorly installed. Each have their own built in flaws... a poorly installed system can have duct leakage, improper placement of duct collars and kinks. A poorly design duct system will have too many wye splits, restrictive registers, no plenum boxes and undersized ducts. Flex ducts are so easy to install that anyone can do it and unfortunately contractors just do the minimum required to pass inspection, which as you probably know leaves homeowners holding the short end of the stick.
Wrong Duct Size
Duct sizing is important because ductwork that is sized too small is like having high blood pressure, the AC system becomes stressed to try to fit a large volume of air down a small hole and not enough air gets delivered to the rooms. Ductwork that is too large is like having low blood pressure where your airflow won’t be able to “throw” itself across the room and leave the room only partially cool. In two story homes with both air handlers or furnaces in the attic, the supply ducts tend to be too small on the 2nd floor system. On almost every home, the returns also tend to run too small also. This is bad because it can make a 5 ton system only receive 4 tons of air and over stress the system.
If you feel plenty of air coming in the room but it seems like your hot room can’t hold that air in the room for a long period of time, the cause of the hot room could be an insulation issue. It’s not just low insulation that causes this problem either, how the insulation is installed is just as important as how much you have. This chart shows your insulation performance gets cut by 50% if there is just a 5% gap in the insulation anywhere around the home.
A thermal camera scan will uncover these insulation misalignments in areas that our auditors can’t get to and a good visual insulation can verify how well the insulation is aligned in areas that are accessible. A home insulated to Energy Star Standards will keep all the cool air in the home and make the AC system run less.
If you notice bird vents on the perimeter of your home or have any changes in ceiling height around the hot room, those are red flags for our auditors. Bird vents are to ventilate the attic but that same ventilation can wind wash the insulation back 1-2 feet from the perimeter of the house, leaving the attic bare in those areas. Insulation contractors are often confused what to do with any changes in ceiling height. Sometimes contractors will make a tent of insulation over a dropped soffit or just leave a decorative shelf completely bare of insulation.
Sun Struck Windows
Surprisingly in Arizona, our homes get more heat gain through sun struck windows than from the attic! Although we have never fixed a hot room by adding a shade screen alone, it will certainly help. And despite what a window contractor may tell you, you do not need to replace your windows to reduce the heat gain coming through them. Window film or a shade screen is all the window needs to reduce the heat gain. Shade screens are the most effective at reducing the heat gain into the home, even more effective than new windows, but they will darken the room. Window film comes in a clear film and is less effective than shade screens but is still more effective than interior blinds. Replacing your windows should be done for aesthetics or noise reduction, but never for cost savings alone. You’ll never get your money back on new windows.
Homes older than 1970 with block walls have zero insulation in them. You’ve probably felt the heat coming off the walls well into the night. By injecting closed cell spray foam into the sun struck walls, you’ll get exponential heat reduction. Block wall homes will typically have the registers above the ceiling and by closing the registers off you can direct more air into the hot room.
Quick Fixes That Help Keep Your House Comfortable and AC Running Well
Have solar prices been going down lately? The answer is yes! Solar power prices have been dropping faster than anyone expected. Experts initially underestimated the drop in prices and now believe they will drop down even quicker as time passes!
CleanTechnica has revealed that a solar panel per watt in 1975 was $101.05, while more than 40 years later, the price in 2015 was just $0.61.
Bloomberg New Energy Finance's Expert Jenny Chase, had predicted that a solar module that was priced from 62 cents/watt in 2015, will drop to the range of 21 cents/watt by 2040!
These figures have since been reduced even further, with an average solar module sold to a utility scale project in 2017 being about 35 cents. This will drop to 32 cents by the end of 2018, and drop to 31 cents in 2019.
As to some reasons why: the biggest factors resulting in the sharp drop come from the combination of fierce competition and technological advances in every part of the solar panel technology sector. These are being fed through to auction prices for government tenders throughout the world and bidders are seeing plenty of return on their speculation about module prices and EPC costs.
Solar power is going to dominate the energy sector this century. The question is just how quickly it will bring down costs and take over the world. Yet again, the answer seems to be: quicker than people thought.
There is no doubt that solar is a reliable and readily available source of energy in sunny Arizona. Installing solar in your home can have a positive impact on the environment and dramatically lower your monthly utility bill. It's a great investment for its low maintenance costs and high returns. For instance, a homeowner can expect a 10 year payback and a 10.6% Investment Return for a 5-kW system 1. Owned solar panels can add 4 to 6 percent to the value of a home 3. Real Estate agents agree that homebuyers are increasingly looking for solar panels in the same way they look for granite countertops or wood floors 3.
Adding solar to your home can save you a lot on your utility bill and potentially earn you money through feed-in tariffs annually. However, we all know that purchasing photovoltaics can have a high upfront cost anywhere between $18,000 and $29,000 2. While the initial investment to purchase solar panels can be high, there are different payment structures and tax incentives that can greatly lower these costs.
Incentives to Installing Home Solar Panels
When installing your home solar panels, you can expect absolutely zero sales tax! Under the Solar Equipment Sales Tax Exemption, you are free from the burden of any Arizona solar tax. Likewise, under the Energy Equipment Property Tax Exemption, the value added to your property from installing solar will not add to your property tax 2.
Arizona also offers a Residential Solar Energy Credit where the resident can get back 25% of the cost of the system through tax credits at a maximum of $1000. If the credit exceeds the taxes you owe, you are able to carry it over for up to five years 1.
In addition to state tax credit savings, there are also benefits on a federal level. Under the Federal Investment Tax Credit (ITC), a purchaser of a home solar energy system is eligible to receive a 30% tax deduction from the cost of their solar energy system after state rebates. To give you an idea of the kinds of savings you could get from this, in 2017 the average solar shopper saved over $5,000 on costs going solar from the ITC alone 4.
The ITC isn't going to last forever. in 2020, the tax credit will reduce to 26%, in 2021 it will reduce to 22%, and by 2022 there will only be a 10% credit remaining for commercial users only 4. This is all the more reason not to wait to install solar panels on your home.
Alternatives to owning solar panels
If you are looking for the benefits of solar but are not ready to invest in a solar energy system of your own, solar leasing and PPAs are both great options. Roughly 75% of solar installations in APS territory are leases, making it the current most popular choice for Arizona solar buyers 2.
With a solar lease, you agree to pay a fixed monthly “rent” or lease payment, which is calculated using the estimated amount of electricity the system will produce, in exchange for the right to use the solar energy system. With solar PPAs, the homeowner agrees to purchase the power generated by the system at a set per-kWh price as opposed to paying "rent" to the solar panel system.
Some of the benefits of solar leases and PPAs are that you can expect 10-30% savings over the cost of your utility bill 4. The leasing company is also responsible for maintaining and handling the panels and interactions between the utility company- making little-to-no work for you! Additionally, there are many options that have $0-down agreements, so you can be at ease.
When you sign a solar lease or PPA, it's important to note that you do not own the solar panel on your property. Under these agreements, you will not receive tax incentives. Additionally, a leased solar energy system can actually detract 3 to 8 percent from the value of a Phoenix-metro home 3. When you go to sell your home with a leased solar energy system, you are selling the lease with the home. This is often seen as unattractive to prospecting home buyers, despite the projected savings in utility bills 3.
A solar lease will last on average 20 years 2. At the end of the lease the homeowner can resign their lease, give back the system, or choose to purchase the system from the company. So if you plan on committing to your solar energy system in the long run, choosing a lease or PPA may be a feasible and effective option for you!
Energy audits are useful ways to uncover why a bedroom is always hot in the summer or why your energy bills are so high, but there is a hidden trove of useful information homeowners can uncover during their home energy audit that isn’t widely known. If you are wondering how much does it cost to have an energy audit and what do we do during an audit, here are the top 6 ways to get the most out of your energy audit from an experience Phoenix energy auditor.
1. Ask about your thermostat settings
Your energy auditor gets to see hundred of energy bills every year for homeowners with lifestyles all over the board. If you feel your energy bill is too high 1 quick thing you can do to lower your bill during an energy audit is to simply ask your auditor about whether you’re on the best rate plan for your lifestyle and whether there are better, more cost-effective alternatives for you. Often times there are hidden savings to be had a no cost to you by simply switching rate plans or installing a smart thermostat that automatically raises itself when you leave the house.
2. Follow the energy auditor
There’s no better way to learn than to be with the energy auditor and see how they do what they do. No, it's not being intrusive and we actually like when homeowners are with us because we get to talk about what we love doing. Being involved in an energy audit will help you better understand why we are recommending certain upgrades and the causes of high energy bills, hot rooms or dust. You can even feel where and how much air is leaking around outlets, windows and doors, pocket doors and exhaust fans. Our energy auditors look at solving your home's hot rooms and high energy bills as a fun puzzle. We perform a bunch of tests on the home which paints a clear picture of what are causing any issues and what is not at fault. It's not guessing or a visual inspection, which is why we attract more technical auditors than sales minded auditors.
3. Prepare 12 months of energy bills for them
For an energy audit to become as successful as it can get, the auditors in place require all the relevant information about your home that they can get and 12 months of energy bills is optimal for an auditor to paint a vivid picture of your home and find what home improvement solutions suits it best.
4. Ask about other recommendations they have that they do not sell
If there’s one thing in this world we can assure you of, it’s that asking never hurts! You can find out about other recommendations and improvements the auditor can suggest simply by asking. Your questions could trigger the auditor to recall a home improvement solution that he/she didn’t think about because it's not included in a typical energy audit.
5. Ask to use the IR camera while the blower door is running
You might think it’s strange for us to recommend you to have the blower door is running when the IR camera is being used. However, there is a good reason for this and it is that the IR camera alone only shows heat gain and the differences in temperature in a specific area but, when the blower is also running it allows the IR camera to also detect air leakage pathways and the source of the leakage. This is a great visual tool to show leakage pathways that are more than just a number.
6. Ask what the energy model doesn’t cover
Unfortunately, our modeling software is not able to model all of our recommendations like adding a return, jump-ducts or airflow balancing. This means that while you will still enjoy the benefits of the improvements, the model won’t be able to predict how much you are saving. This is where your energy auditor's experience comes into play to help find the right efficiency package for your needs.
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