Frequently Asked Questions


What is Efficiency Works Store?

Efficiency Works Store is an online store that offers instant rebates on many energy-related products. All items in the store have been researched by industry experts and are recommended by your electric and/or water service provider.

How do I find products on Efficiency Works Store?

You can view the available products by clicking on a category from the navigation bar towards the top of the page. From the collection page you can click on any product to see additional details and specifications. Efficiency Works Store’s home page also features energy-saving products you can click on for more details.

What can I buy on Efficiency Works Store?

We offer a variety of smart thermostats, connected home products, lighting products, water savings products, outdoor living products, and advanced power strips. We regularly add new products, and we update our inventory according to demand and availability.

How do I review a product?

You can add a review by clicking on the product, scrolling down to the “Product Reviews” tab and clicking on “Write a review.”


Which products are eligible for rebates?

Our goal is to make it easy and affordable for you to buy the latest energy products for your home. That's why many of the products on Efficiency Works Store are eligible for instant rebates. Below each product, you'll see a quick description of any available rebates.  

How do I apply for rebates?

When products eligible for an instant rebate are added to your cart, an “Apply Rebates” button will appear. Click “Apply Rebates” and complete the verification process. Your instant rebate will be automatically applied after verification.

Is everyone eligible for a rebate?

To be eligible for rebates, you must be a residential or commercial customer of Estes Park Light & Power, Fort Collins Utilities, Longmont Power & Communications, or Loveland Water and Power. We will verify your eligibility during the checkout process.

How do I find out if I’m eligible for an instant rebate?

There are a few ways we can determine your eligibility:

  • Enter your shipping address during the “Apply Rebates” process and click “Check Eligibility.”
  • Enter your electric utility account number during the “Apply Rebates” process and click “Check Eligibility.”

Please note that you must agree to the Rebate Terms and Conditions to be eligible for instant rebates.

What are the terms and conditions for the Efficiency Works Store instant rebates?

When applying instant rebates to your purchases, you must agree to our Rebate Terms and Conditions.

What other rebates does Efficiency Works offer?

We offer rebates on a variety of residential and commercial efficiency upgrades. Please visit for a full list of rebate offerings for home and business. 

Discount Codes

How do I get a discount code?

Efficiency Works Store will email special discount codes throughout the year.

How do I apply my discount code?

Discount codes are entered and applied in the “Discount” field during checkout.

Account Access

How do I sign in?

The “Sign In” link in the upper right corner of Efficiency Works Store enables you to sign in using your My Account user ID and password.

Why should I sign into Efficiency Works Store?

There are benefits to signing in:

  • Provides access to your order history and details about each order (such as items in the order, a breakdown of charges, and shipping/billing address used).
  • Pre-populates your shipping information, based on the primary address on your electric service account (you can change it if you like).

To log out of your accounts, click on your name and select “Logout” from the dropdown menu.

Payment Information

What payment methods are accepted on Efficiency Works Store?

We accept Visa, MasterCard, American Express, JCB, Discover and Diners Club.

Why wasn’t I able to complete my credit card transaction?

Please check that your credit card information is correct. If you still can’t complete your transaction, please call us at 1-844-776-6720 and we will be happy to help.

Order Information

How can I view and print my order confirmation?

You’ll receive a confirmation email with all your order details.

How do I track my order?

Tracking information will be included in the shipping confirmation email we send to you once your order ships.

Note: during peak seasonal and promotional periods, shipping estimates may be slightly delayed 3-5 business days. Please be on the lookout for your tracking email.

Can I cancel an order?

In order to get your order to you as quickly as possible, we begin processing your shipment immediately after you hit "submit". This means that unfortunately, we are unable to cancel orders for in stock items.

What if I received a damaged product?

Please contact us or call 1-844-776-6720. We will provide a pre-paid return shipping label and explain how to return your order.

Why is my item on backorder?

On rare occasions, popular products may be temporarily sold out, but usually will be back in stock quickly.  If you’d like to adjust your order, please contact us or call 1-844-776-6720. We are happy to help.

How do I view my previous orders?

When you sign in on Efficiency Works Store, several options will appear in the box under your name. Select “Efficiency Works Store account” to view your order history and details about each order.

Shipping & Delivery

For shipping and delivery questions, please visit Shipping.


For questions on returns, please visit Returns.


Will Efficiency Works install my thermostat?

Efficiency Works does not offer installation services on smart thermostats. Please be aware of the installation requirements for each thermostat before purchasing. To check installation compatibility, please review the following:

Does my smart thermostat need a C-wire?

Some thermostats require a C-wire to power the device. Depending on the thermostat you buy, you may or may not need a C-wire. Please check the product details of the thermostats you’re considering to find out if a C-wire is required.

If the smart thermostat you’re buying requires a C-wire and an adapter is not included, you can purchase one separately (search for “C-wire adapter”) or a contractor can help you install the device. 

Make sure to check your current wiring before purchasing any thermostat, and review the installation compatibility checks listed above.

Product Warranties

All warranties are provided by the product manufacturers. Please visit the product manufacturer website for warranty information.


Your privacy is very important to us. Efficiency Works and its partner utilities only utilize data necessary for us to determine if you are eligible for a rebate. We do not acquire data related to your electric or water usage, personal demographics, and/or other data characterizing your home or business. For details, please visit Efficiency Works Store Privacy Policy. For your convenience, here are links to the Privacy Policy of each of the thermostat manufacturers on Efficiency Works Store:

Other Questions

Still have questions? We are happy to help. Please contact us or call 1-844-776-6720.