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Avatar for JA Bertsch Heating and Cooling LLC
JA Bertsch Heating and Cooling LLC
5.0(
5
)

Serving Dover, ID and surrounding areas

Approved

In business since 2005

Free estimates

Credit card accepted

J.A. Bertsch Heating & Cooling is a family-owned HVAC and electrical services company based in Coeur d'Alene, Idaho. Founded in 2005 by owner Joel Bertsch, the company specializes in residential heating, air conditioning, heat pumps, indoor air quality, water heaters, electrical services, generators, and preventative maintenance programs. Serving communities throughout North Idaho, including Coeur d'Alene, Post Falls, Hayden, Rathdrum, Sandpoint, and surrounding areas, the company has built a strong reputation for customer service, technical expertise, and community involvement.

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+2

15 neighbors recently requested a quote
National Electric & Construction Inc
New to Angi

Serving Dover, ID and surrounding areas

Approved

In business since 2025

Free estimates

Emergency services offered

With 25 years of experience, National Electric & Construction Inc is committed to excellence in every aspect of our business. We uphold a standard of integrity bound by fairness, honesty, and personal responsibility. Our distinction is the quality of service we bring to our customers. Accurate knowledge of our trade combined with ability is what makes us true professionals. Above all, we are watchful of our customers' interests and make their concerns the basis of our business.

11 neighbors recently requested a quote
Avatar for Honest Electric LLC
Honest Electric LLC
5.0(
52
)

Serving Dover, ID and surrounding areas

In business since 2024

Free estimates

Emergency services offered

"We ran into some minor issues with the work (parts that had to be back-ordered), and they kept me up-to-date on scheduling, etc., and bent over backwards to get the work done. Even worked the evening one day without any requirement to do so. Very professional, very respectful, and will definitely hire them again."
Generac Generator
Re-device
After New Fixture
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+15

Response time5 hrs
Response rate98%
Avatar for Origin Electric, LLC
Origin Electric, LLC
4.7(
13
)

Serving Dover, ID and surrounding areas

In business since 2020

Free estimates

Small jobs welcome

"Clay took the time to research and come up with the best solution for our somewhat particular need, and to educate us on generators along the way. He had great response time, answered all of our many questions, and did quality work at a reasonable price. He was a pleasure to work with and we will be giving him referrals every chance we get!"
Response time2 hrs
Recommended by100%of homeowners
Avatar for Interstate electrical contractors
Interstate electrical contractors
4.5(
8
)

Serving Dover, ID and surrounding areas

In business since 1982

Free estimates

Credit card accepted

"Interstate Electrical exceeded all of my expectations! You can tell they take pride in their work and truly care about their customers. It’s hard to find a company this reliable and trustworthy these days—Interstate Highly recommended!"
Response time20 mins
Recommended by12%of homeowners
Avatar for New Frontiers Innovations, LLC
New Frontiers Innovations, LLC
5.0(
5
)

Serving Dover, ID and surrounding areas

In business since 2023

Free estimates

Small jobs welcome

"Matt did excellent work, on time as promised, and everything he left, was perfectly neat. He will be in town for some time to come, and he is building a reliable business and reputation."
Response time3 hrs
Response rate96%
Recommended by100%of homeowners
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Generator Install questions, answered by experts

Generally, you’ll want to keep between 60 and 70 feet between the generator and the transfer switch. There are a few reasons for this, including:

  • The distance reduces the noise coming from the generator into your home.

  • It increases efficiency because you won’t have a voltage drop from this short of a distance.

  • Prevents carbon monoxide poisoning: keep at least 15 feet between your generator and an open window. 

Here’s what you can run with different wattages and types of generators:

Portable generator:

  • 2,000 watts can handle a large appliance like a freezer or refrigerator, plus a few smaller items like phones or computer chargers. 

  • 4,000 watts will keep two large appliances operating and a few smaller devices.

  • 8,000 watts should power most essential appliances and other devices, including a sump pump, well pump, or your dishwasher.

Partial to whole-house generator:

  • 20,000 watts and above will make it seem like your home’s power is still on.

A portable generator can supply power to selected appliances and circuits in a home, but it's generally not designed to handle the entire household's electrical needs simultaneously. Portable generators have limited wattage capacity, so they are only designed to power essential devices and electronics temporarily until local power is restored. If your power needs outweigh the capabilities of a portable generator, consider installing a whole-home generator instead.

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.

If you have a transfer switch properly installed, the generator and main electrical power cannot feed the system at the same time. However, you should still shut off the power at your main circuit breaker panel before activating the generator. If you do that, you’ll simply need to shut off the generator and reset your circuit breaker once the local power comes back on.

The Dover, ID homeowners’ guide to generator installs

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