how many pump types have no typical use listed?
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col : pump type and source | typical use | 35 °c\n(e.g. heated screed floor) | 45 °c\n(e.g. heated screed floor) | 55 °c\n(e.g. heated timber floor) | 65 °c\n(e.g. radiator or dhw) | 75 °c\n(e.g. radiator and dhw) | 85 °c\n(e.g. radiator and dhw) row 1 : high-efficiency air source heat pump (ashp), air at − |  | 2.2 | 2.0 | ‐ | ‐ | ‐ | ‐ row 2 : two-stage ashp, air at −20 °c | low source temperature | 2.4 | 2.2 | 1.9 | ‐ | ‐ | ‐ row 3 : high efficiency ashp, air at 0 °c | low output temperature | 3.8 | 2.8 | 2.2 | 2.0 | ‐ | ‐ row 4 : prototype transcritical co\n2 (r744) heat pump | high output temperature | 3.3 | ‐ | ‐ | 4.2 | ‐ | 3.0 row 5 : ground source heat pump (gshp), water at 0 °c |  | 5.0 | 3.7 | 2.9 | 2.4 | ‐ | ‐ row 6 : gshp, ground at 10 °c | low output temperature | 7.2 | 5.0 | 3.7 | 2.9 | 2.4 | ‐ row 7 : theoretical carnot cycle limit, source −20 ° |  | 5.6 | 4.9 | 4.4 | 4.0 | 3.7 | 3.4 row 8 : theoretical carnot cycle limit, source 0 °c |  | 8.8 | 7.1 | 6.0 | 5.2 | 4.6 | 4.2 row 9 : theoretical lorentzen cycle limit (co\n2 pump |  | 10.1 | 8.8 | 7.9 | 7.1 | 6.5 | 6.1 row 10 : theoretical carnot cycle limit, source 10 °c |  | 12.3 | 9.1 | 7.3 | 6.1 | 5.4 | 4.8
how many pump types have no typical use listed?
Pump type and source Typical use 35 °C\n(e.g. heated screed floor) 45 °C\n(e.g. heated screed floor) 55 °C\n(e.g. heated timber floor) 65 °C\n(e.g. radiator or DHW) 75 °C\n(e.g. radiator and DHW) 85 °C\n(e.g. radiator and DHW)
High-efficiency air source heat pump (ASHP), air at −20 °C 2.2 2.0 ‐ ‐ ‐ ‐
Two-stage ASHP, air at −20 °C Low source temperature 2.4 2.2 1.9 ‐ ‐ ‐
High efficiency ASHP, air at 0 °C Low output temperature 3.8 2.8 2.2 2.0 ‐ ‐
Prototype transcritical CO\n2 (R744) heat pump with tripartite gas cooler, source at 0 °C High output temperature 3.3 ‐ ‐ 4.2 ‐ 3.0
Ground source heat pump (GSHP), water at 0 °C 5.0 3.7 2.9 2.4 ‐ ‐
GSHP, ground at 10 °C Low output temperature 7.2 5.0 3.7 2.9 2.4 ‐
Theoretical Carnot cycle limit, source −20 °C 5.6 4.9 4.4 4.0 3.7 3.4
Theoretical Carnot cycle limit, source 0 °C 8.8 7.1 6.0 5.2 4.6 4.2
Theoretical Lorentzen cycle limit (CO\n2 pump), return fluid 25 °C, source 0 °C 10.1 8.8 7.9 7.1 6.5 6.1
Theoretical Carnot cycle limit, source 10 °C 12.3 9.1 7.3 6.1 5.4 4.8
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