"Air path or offer condition","Offer A","Offer B","Document or reviewer question"
"Exact model and revision","","","Record current OEM documentation for each offered model"
"Combustion-air origin","","","Inside greenhouse, separate outdoors, or unknown; cite architecture statement"
"Combustion-product destination","","","Approved exhaust destination; distinguish from intake"
"Greenhouse heat-distribution air","","","Describe air across the heat exchanger and return to crop space"
"Paths connected to greenhouse air","","","Name each intended connection; circulating fan does not prove outdoor intake"
"Power-vented wording","","","What does the phrase actually document? Do not infer separated combustion"
"Fuel and destination market","","","Exact model/fuel/market confirmation; no global conformity inference"
"Vent package included","","","Document included scope; no sizing or routing instructions"
"Intake package included","","","Document included scope; no retrofit proposal"
"Closed-house assumptions","","","Operating description for qualified review"
"Exhaust-fan operating context","","","Provide actual intended operation, not a self-designed interlock"
"Humid, dusty or corrosive conditions","","","Site context for model suitability review"
"Local qualified design responsibility","","","Named responsible professional and scope"
"Open architecture or package question","","","State unknown explicitly and request model-specific clarification"
"Review conclusion and next action","","","Selection outcome only; this record is not a compliance certificate"
"Use","Fill both offer columns manually and keep the three air paths separate. Attach the OEM evidence for each conclusion. No installation, conversion or live testing is specified. Import UTF-8/comma; adjust wrapping and save a native copy.","",""
"Source context","Manual tool; no formulas. Original inquiry structure. Source conditions are not acceptance limits.","","https://farm-energy.extension.org/wp-content/uploads/2019/04/3.-A3907-02.pdf | https://www.modinehvac.com/all-products/gas-fired-unit-heaters/hot-dawg-separated-combustion-gas-fired-unit-heater-hds-hdc/ | https://www.umass.edu/agriculture-food-environment/greenhouse-floriculture/fact-sheets/problems-with-using-unvented-greenhouse-heaters"