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John Betlem Heating & Cooling Inc - Electrical
4.7(
157
)
Fixed Generator - Install

Serving Le Roy, NY and surrounding areas

Approved (Corporate)

In business since 1941

Free estimates

Emergency services offered

John Betlem Heating & Cooling is a 3rd generation company founded in 1941. They provide Residential HVAC, Electrical and Insulation Services to Rochester, NY and the surrounding towns. John?s slogan that still holds true today is to do ?whatever it takes? to satisfy customers.\n\nJohn Betlem is a premier family operated solutions provider, passionately committed to the health, safety, and comfort for all they serve.

50 neighbors recently requested a quote
Recommended by91%of homeowners
RJN Electrical Services, Inc.
4.7(
13
)
Fixed Generator - Install

Serving Le Roy, NY and surrounding areas

Approved

In business since 1987

Free estimates

Emergency services offered

"I needed to update my electric desperately and as soon as I spoke with Art my mind was put at ease. Everything was explained to me in a way I was easily able to understand and know what the process would be from beginning to end. I had all of my questions answered in a timely and friendly manner. The work that was done was amazing and all at a reasonable price... more than worth the money and I would recommend them to anyone. They are the only electricians I will call to do any work from now on!!"
Response time1 day
Recommended by100%of homeowners
Avatar for Schedel Electric
Schedel Electric
5.0(
10
)
Fixed Generator - InstallPortable Generator - Install

Serving Le Roy, NY and surrounding areas

In business since 2022

Free estimates

Emergency services offered

"Project was replacement of breaker box and electrical riser (the wires on the side of the house from the power company) whose insulation deteriorated and caused water leakage into breaker box during heavy rains. Got three proposals and went with Schedel. Very satisfied. Their honesty, flexibility, and punctuality were commendable. Unlike other contractors, they don't listen to the radio while working. Their quote included relabeling the circuit breakers, a plus since other contractors charge extra. Finally, their quote was significantly lower than the other two contractors. And the payment terms were flexible, to say the least."
Response time5 hrs
Response rate98%
Recommended by100%of homeowners
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Generator Install questions, answered by experts

A 10,000-watt generator can run a small to mid-sized central AC unit (typically up to 3 tons or 36,000 BTU) along with a few other appliances. However, larger AC units or additional loads will require a bigger generator. Consult a local generator installer to ensure you add the correct size generator to your home.

While diesel is relatively stable, it won’t last nearly as long as propane and you may have to replace it if it sits unused for too long. Diesel can sometimes struggle to work efficiently or start engines during especially cold weather, so it’s not the best choice for every climate. Compared to fuels like propane and natural gas, diesel generators tend to be noisier and create more exhaust, which isn’t always ideal for home use.

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.

You may need a permit for a portable generator if you’ll be installing a transfer switch for your primary residence or similar work. Otherwise, a permit for other uses may not be necessary. Check your local building codes or ask a local generator installer for more information about your local regulations.

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.

The Le Roy, NY homeowners’ guide to generator installs

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