Is that 40A HVAC an electric heater or something? That's massive. I have a 30A two ton mini split that only pulls about 9 amps (110) at full throttle heat.
Josh Luthman Office: 937-552-2340 Direct: 937-552-2343 1100 Wayne St Suite 1337 Troy, OH 45373 On Sun, Feb 9, 2020 at 9:04 AM <ch...@wbmfg.com> wrote: > If your HVAC is 240 then you have more HVAC load than that generator can > pull on just that one load. > > 40 amps x 240 Volts is 9600 Watts. > > 7.5 kW generac will only deliver 31 amps at 240 VAC And you really don’t > want to load a generator up that much. 50% is a good derating factor. > Also, generators publish their power output at sea level. > > Knock off 3% for every 1000’ above sea level and 2% for every 10 degrees > above 70 degrees F > Rounding up, you are close to 5000’ so that is 15% lost for altitude and > in the summer at 110 degrees that is another 8%. > So you lose as much as 23% of capacity on a hot summer day. Worse if you > power it from natural gas. > > I would add up all your loads, add 50% for growth then double that figure > for not loading the generator too much and to account for derating. > > The installation is the expensive part. Don’t scrimp on kW at this stage > of the game. Sounds to me like you need a 20 kW or more depending on your > true HVAC loads. > > *From:* Sterling Jacobson > *Sent:* Saturday, February 8, 2020 6:04 PM > *To:* AnimalFarm Microwave Users Group > *Subject:* [AFMUG] Generator for office > > > I need a smaller footprint generator for my 1300 sqr foot office. > > > > Was thinking of getting the 50A 7.5KW Generac 6998 for $2050.00 that > includes the 50A transfer switch. > > > > I think my breakers has several 20A switches and 40A for the HVAC. > > > > Not sure if this would cover the power needed for the whole unit, or just > the fiber cabinet/rack I have that has max 20A circuit to it? > > > > The next highest power draw is probably the HVAC and/or water heater. > > > > The lights only draw about 500W since I switched them all to LED. > > > > > > ------------------------------ > -- > AF mailing list > AF@af.afmug.com > http://af.afmug.com/mailman/listinfo/af_af.afmug.com > > -- > AF mailing list > AF@af.afmug.com > http://af.afmug.com/mailman/listinfo/af_af.afmug.com >
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