Measure the conditions that matter
Have the provider establish representative winter inlet-water temperature and the proposed room's winter air conditions. A Denver address does not supply either measurement. Tell the provider if the room is heated, unheated, enclosed, or being remodeled.
Describe the busiest hour of use and the actual shower or bath pattern. Include consecutive uses and simultaneous laundry or dishwashing. If current hot water is inadequate, explain when it runs out and how long the household waits.
Compare delivery and reheating
Ask for the selected model's first-hour rating, which describes delivery during an hour starting with a fully heated tank, and its applicable reheating data. Confirm the conditions and operating mode behind those numbers. A rating from a warmer test is useful for comparison but does not guarantee your winter result.
Request a comparison of suitable tank sizes and supported modes under the proposed conditions. Ask whether the design meets the busy period with the heat pump, depends on backup elements, or needs a change in use. Compare the electrical and operating-cost implications of that choice.
Do not turn the temperature up as an informal substitute for a delivery plan. Request qualified guidance on the intended setting and any required protection at the fixtures.
Make the choice reviewable
Have the quote state winter assumptions, selected equipment, air supply, drainage, electrical work, and startup verification. If the proposed location cannot support the needed result, compare another location or equipment option before purchasing.
Your next step is to request a winter delivery and reheating explanation using measured site conditions and your busiest-hour needs. Cold incoming water is a design input, not proof that the technology cannot work in Denver.