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Avatar for Posert Energy Consulting
Posert Energy Consulting
4.6(
47
)

Serving Cotati, CA and surrounding areas

Approved

In business since 2019

Customers say: True professional

"I highly recommend having Peter do an energy audit on your home. He gave me valuable recommendations on how I can make my home more cozy and energy efficient."
Response time2 days
8 neighbors recently requested a quote
Recommended by95%of homeowners
Avatar for Global Green Solutions
Global Green Solutions
5.0(
248
)

Serving Cotati, CA and surrounding areas

Approved

In business since 2005

Free estimates

Emergency services offered

"They replaced our old furnace with a modern, energy-efficient model. The installation was clean and hassle-free. Highly satisfied with the improved performance. The new system has already lowered our energy bills."
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+24

Response time3 days
10 neighbors recently requested a quote
Recommended by7%of homeowners
Avatar for Mega Power Electric, Inc
Mega Power Electric, Inc
5.0(
191
)

Serving Cotati, CA and surrounding areas

In business since 2000

Free estimates

Emergency services offered

"Great job on the house, they had everything installed in 3 days and once the LAWP Panel from the power company and hooked everything, then everything was working well. they took care of all the paper works and documentation, and everything was done quickly. Best price available for us."
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+32

Recommended by100%of homeowners
Avatar for Service Champions Heating & Air Conditioning
Service Champions Heating & Air Conditioning
4.6(
688
)

Serving Cotati, CA and surrounding areas

In business since 2003

Free estimates

Emergency services offered

"Our Service Tech, Alex Peck, arrived on time to perform the annual check up & tune-up of our HVAC System. He was very professional and following the Tune-Up asked if there was any other items that needed done or looked into that he could take care of. His services were very much appreciated and very professional. Lee"
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+42

Response time9 hrs
Response rate96%
Recommended by91%of homeowners
Avatar for Independent Powur Solar Energy Consult.
Independent Powur Solar Energy Consult.
5.0(
5
)

Serving Cotati, CA and surrounding areas

In business since 2017

Free estimates

Emergency services offered

What are the Advantages?\n• Powur is like no other solar energy company in the industry. Rest assured, that we will work harder than any other company in the industry to ensure that you have an exceptional customer experience. You can count on us to be with you every step of the way. \n• Powur was named one of the fastest growing private companies in the US by Inc. 5000 magazine\n• Powur is the one of the largest residential solar provider in the United States\n• Powur has installed thousands of systems and offers the best in financing options and warranty services\n• Powur is the 1st solar company to offset 100% of solar manufacturing & installation emissions\n• Powur is a Public Benefit Corporation, our mission is to do good by our community and the environment\nPowur has the most robust product offering and financing options available in the solar industry. We make it painless and easy for homeowners to transition to solar. Here’s an at-a-glance overview of the financing and products that we offer:\nNo matter which option you decide is best for you, the result will be the same: clean energy for your home and more money in your pocket for the things you really care about.\nIf you are ready to see the substantial energy savings of your future solar system, \ncontact a Powur Consultant for your free proposal today!\n$0 Down Lease \nOffers allow, fixed monthly \npayment for 20 years. Full and \npartial prepay options for added \nsavings.\n$0 Down Loan\nPay for your system with a low \nAPR, fixed cost loan for terms \nranging from 10 to 25 years. With \na loan, you keep all the eligible tax \ncredits and solar rebates!\nCash\nBuy the system outright and own \nthe energy from day one. Benefits \nfrom available tax credits go \nstraight to you\n\nhttps://calendly.com/trevorthesolarpro/introduction \n\nGo to the link above to schedule a 15 Minute Introduction Call to further understand your needs for your Solar Project!

Before Install
ACT NOW BEFORE THE PROMOTION COMES TO AN END!
Installation Process
Clean Looking Black on Black Panels!!!
Side by Side Comparison of what the Black on Black looks like vs Black with white grid lines!

+25

Recommended by100%of homeowners
Avatar for Green NRG Inc.
Green NRG Inc.
4.1(
62
)

Serving Cotati, CA and surrounding areas

In business since 1999

Emergency services offered

Credit card accepted

"We are so happy with our solar panels and knowing we are utilizing the sources naturally given to us to acquire energy. We are hoping to see the difference it will make on our bill. The team and company at Green NRG involved have made this process so easy and educational they have been incredible to work with. I can't say between the professionalism when I called with questions they were great. We would recommend you without hesitation as we are 110% satisfied."
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+12

Recommended by90%of homeowners
Avatar for Attic Masters
Attic Masters
4.7(
33
)

Serving Cotati, CA and surrounding areas

In business since 2010

Free estimates

Credit card accepted

"Attic masters did a good job at my house by cleaning the ducts. I spoke to them prior and they were nice to me. they gave me several options and explain to me the difference between each one and they recommended me which one to choose. The work that they did was good and the people that did the actual work were very nice. I will hire them again.
"
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+7

Recommended by95%of homeowners
Showing 1-10 of 33
Energy Efficiency Auditing questions, answered by experts

HVAC systems use the most household electricity. This major and essential system is responsible for heating and cooling your home all year round. Since they operate for a significant amount during the day, it consumes more energy than other appliances. 

To determine the right size generator for your house, you should calculate the total wattage of the appliances and devices you want to power during an outage. List all essential items, note their start-up wattages, and add them together.

Here are some typical wattage requirements for common appliances:

  • Refrigerator: 600 watts

  • Large dehumidifier: 700 watts

  • Large window air conditioner: 1,400 watts

  • Water heater: 3,000 to 4,500 watts

  • Electric furnace: 5,000 to 25,000 watts

A 7,500-watt generator might be sufficient for essentials like a refrigerator, freezer, well pump, and lighting circuits. However, for high-demand items like a water heater or furnace, a whole-home generator is a better choice. A portable generator may be enough if you only need to power a few critical items.

While home square footage can offer a rough estimate, it is not always a reliable indicator. For reference, here are some typical generator sizes based on square footage:

  • 1,000 sq ft: 6–9 kW

  • 1,500 sq ft: 7–10 kW

  • 2,000 sq ft: 10–14 kW

  • 2,500 sq ft: 12–16 kW

  • 3,000 sq ft: 16–20 kW+

For the most accurate sizing, consult a professional who can calculate your home's peak and average power consumption and recommend the optimal generator.

Yes, these services often increase home value by preventing moisture-related issues and enhancing the usable space in basements or crawlspaces.

Depending on the level of audit you choose, a home energy audit will at least include a walk-through of the home to determine visible inefficiencies, but may include testing and a highly detailed inspection and report laying out the home’s inefficiencies and providing recommendations to fix those issues. The audit may also include a review of utility bills and mechanical testing. Consult your home energy auditor about the types of services they provide before hiring.

Wood windows fall in the middle of the window frame materials when it comes to energy efficiency. They’re more insulating than aluminum and vinyl, but they aren’t as efficient as fiberglass or composite frames. If you love the look and lifespan of wood windows and want to maximize efficiency, you can upgrade to double-pane or triple-pane glass and consider window tinting and low-emissivity (low-E) coatings to minimize heat transfer.

The Cotati, CA homeowners’ guide to energy efficiency auditing services

From average costs to expert advice, get all the answers you need to get your job done.