why do you need a 20kw generator ? and 40 gallons of hot water ?
Our 42 ft coach has an Onan 10kw QD and doesn't need that much (even when running 2 15kw ac units and all the other stuff inside).
Given that you're building a 20ft, I'm not sure you need 2 a/c units.
an Onan 18kw QD generator will consume close to 1.5 gallons per hour & even at no load it'll suck down 1/2 a gallon of diesel per hour.
Again Im not sure what you're use case is but a 40 gallon hot water heater seems excessive - especially considering space will be a premium in 240"
Our 10gal electric/propane water heater provides plenty of hot water for a family of 4 (we don't run out taking showers).
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Don R.
'04 Haulmark (M42386) 42', 2 slide, 10kw - Pictures
'04 F350 CrewCab Longbed 4x4, 50g aux tank & gear vendors dbl over
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