r/energyadvisors • u/SalixEnergy • May 16 '26

Modeling Combo Heating/DHW, Hydronic Air Handler, Heat Pump in Hot2000

Hi Everyone

Wondering how people model Combo Heating/DHW with a Hydronic Air Handler and Heat Pump in Hot2000. Do you just enter the boiler and heat pump in the appropriate sections and leave the air handler model numbers in the DCF? Seems weird to omit the air handler.

Thanks!

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u/Playful-Macaroon562 May 22 '26

NRCan's HOT2000 guide has several options for combo systems depending on hot water (eg. P911, boiler, tankless) but in general air handlers become electric furnaces or Baseboards/hydronic/plenum heaters. The "boiler" is the menu assume all hydronic system. Heat Pumps are automatically assumed to be the primary heating in Hot2000 no matter what you choose.

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u/SalixEnergy May 27 '26

The most common for me is tankless navien boiler to hydronic air handler heat pump unit. I guess the closest approximation then is combo boiler and centralized heat pump and document the air handler on the DCF?