Sizing Tool | Eco2systems

Winter Cold Water Temp (F)

Hot Water Temp Setpoint (F)

What's my groundwater temperature?

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Calculate

USAGE DETAILS

Daily HW Use Per Person, Gal.

ASHRAE uses 15.5 gal/person/day but we suggest using 25 g/p/d.

# of Units

Occupancy Factor

Max Occupancy

Studio

1BR

2BR

3BR

Other

Total Maximum Building Occupancy

HUD sets the maximum occupancy factor as 2 per bedroom plus 1 per apartment for high density housing, but this is also affected by local laws and by actual square footage. We suggest the following Occupancy Factors for standard density housing:

Studio - 1.69, 1 Bed - 2.26, 2 Bed - 2.83, 3 Bed - 3.4, 4 Bed - 3.9

Central Laundry on Site

Uses / Apartment / Week

DHW Gallons per Load

Daily HW Use Per Person, Gal.

ASHRAE uses 15.5 gal/person/day but we suggest using 20 g/p/d.

Number of Residents

For a single-family residence, use the theoretical maximum occupancy of the dwelling rather than actual occupancy to ensure sufficient hot water in all scenarios.

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CALCULATED DAILY USAGE

DHW Usage (Gal/Day)

Equivalent at SANCO₂ Temp

Peak Period Usage (%)

Single Family

Multi Family

Required Storage Capacity (Gal)

SIZING RECOMMENDATION

Number of Heat Pumps

Heat Pump Output (Gal/Hr)

Heat Pump Daily Run Time (Hrs)

Tank Recommendation

* This sizing tool is intended to offer an accurate estimate of the number of heat pumps and storage capacity required for a given application. This estimate depends upon accurate input values.
ECO₂ Systems LLC is not responsible for inaccurate sizing obtained with incorrect inputs.
If you have any questions about this sizing tool, or if you need help with sizing, please contact us.