Storage Heater Selection Table

 

In order to choose the correct storage heater for your room you will need to know (1) the room’s heat loss and (2) the duration of your Electric Utility’s off-peak period.

(1)   Typical heat losses are in the range of 6-10 W per sq.ft, depending on the quality of your insulation and tightness of your building envelope. To estimate your room’s heat loss, please see our Heat Loss Calculator.

(2)   Choose your region below to find the duration of your Electric Utility’s off-peak period and match your heat loss to the model of storage heater that’s right for you.

Choose your region: Minnesota | Nova Scotia | Rural Electric Cooperatives | Ontario

Minnesota Power, USA

Model

Element Size

Maximum Maintainable Heat Loss1
based on Minnesota Power’s Off-Peak period

Wire Size2

Breaker Size2

 

Wattage

8 hours

(AWG)

(Amps)

QSH-070

1.56 kW

0.7 kW
2,390 BTUH

#14/2

15

QSH-100

2.22 kW

1.0 kW
3,410 BTUH

#14/2

15

QSH-125

2.76 kW

1.25 kW
4,270 BTUH

#14/2

15

QSH-150

3.3 kW

1.5 kW
5,120 BTUH

#12/2

20

VFMQ20

2 kW

0.9 kW
3,070 BTUH

#14/2

15

VFMQ30

3 kW

1.3 kW
4,440 BTUH

#12/2

20

VFMQ40

4 kW

1.8 kW
6,150 BTUH

#10/2

30

VFMQ50

5 kW or 6.4 kW

2.3 kW
7,850 BTUH

#10/2 or #8/2

30 or 40

VFMQ60

6 kW or 7.6 kW

2.7 kW
9,200 BTUH

#8/2

40

VFMQ70

7 kW or 9 kW

3.1 kW
10,600 BTUH

#8/2 or #6/2

40 or 50

  1. Maximum Maintainable Heat Loss refers to the maximum heat loss each storage heater can meet based on the length of your utility’s off-peak period.
  2. Wire and Breaker sizes should be confirmed based on your local electrical code

Nova Scotia, Canada

Model

Element

Maximum Maintainable Heat Loss1
based on Nova Scotia Power’s TOD rate structure

Wire Size2

Breaker Size2

 

Wattage

Nova Scotia Power3
8 + 4

Manual4
8 + 0

(AWG)

(Amps)

QSH-070

1.56 kW

0.7 kW

0.7 kW

#14/2

15

QSH-100

2.22 kW

1.0 kW

1.0 kW

#14/2

15

QSH-125

2.76 kW

1.25 kW

1.25 kW

#14/2

15

QSH-150

3.3 kW

1.5 kW

1.5 kW

#12/2

20

VFMQ20

2 kW

1.1 - 1.4 kW

0.8 - 0.9 kW

#14/2

15

VFMQ30

3 kW

1.7 - 2.1 kW

1.2 - 1.4 kW

#12/2

20

VFMQ40

4 kW

2.1 - 2.7 kW

1.6 - 1.8 kW

#10/2

30

VFMQ50

5 kW

2.8 - 3.7 kW

2.1 - 2.3 kW

#10/2

30

VFMQ60

6 kW

3.4 - 4.3 kW

2.5 - 2.7 kW

#8/2

40

VFMQ70

7 kW

3.8 - 4.7 kW

2.8 - 3.1 kW

#8/2

40

  1. Maximum Maintainable Heat Loss refers to the maximum heat loss each storage heater can meet based on the length of your utility’s off-peak period.
  2. Wire and Breaker sizes should be confirmed based on your local electrical code.
  3. The Nova Scotia Power column assumes the use of the Dimplex control panel and the intelligent use of the additional 4-hour mid-peak standard rate period.
  4. When using a manual control strategy, the mid-peak standard rate period is not used for charging and therefore the lower heating capacity must be used.

Rural Electric Cooperatives

Model

Element

Maximum Maintainable Heat Loss1
based on the length of your Off-Peak period3

Wire Size2

Breaker Size2

 

Wattage

8 hours

10 hours

12 hours

(AWG)

(Amps)

QSH-070

1.56 kW

0.7 kW
2,390 BTUH

0.7 kW
2,390 BTUH

0.7 kW
2,390 BTUH

#14/2

15

QSH-100

2.22 kW

1.0 kW
3,410 BTUH

1.0 kW
3,410 BTUH

1.0 kW
3,410 BTUH

#14/2

15

QSH-125

2.76 kW

1.25 kW
4,270 BTUH

1.25 kW
4,270 BTUH

1.25 kW
4,270 BTUH

#14/2

15

QSH-150

3.3 kW

1.5 kW
5,120 BTUH

1.5 kW
5,120 BTUH

1.5 kW
5,120 BTUH

#12/2

20

VFMQ20

2 kW

0.9 kW
3,070 BTUH

1.0 kW
3,410 BTUH

1.1 kW
3,750 BTUH

#14/2

15

VFMQ30

3 kW

1.3 kW
4,440 BTUH

1.5 kW
5,120 BTUH

1.7 kW
5,800 BTUH

#12/2

20

VFMQ40

4 kW

1.8 kW
6,150 BTUH

1.9 kW
6,490 BTUH

2.1 kW
7,150 BTUH

#10/2

30

VFMQ50

5 kW or 6.4 kW

2.3 kW
7,850 BTUH

2.6 kW
8,900 BTUH

2.8 kW
9,550 BTUH

#10/2 or #8/2

30 or 40

VFMQ60

6 kW or 7.6 kW

2.7 kW
9,200 BTUH

3.0 kW
10,250 BTUH

3.3 kW
11,250 BTUH

#8/2

40

VFMQ70

7 kW or 9 kW

3.1 kW
10,600 BTUH

3.4 kW
11,600 BTUH

3.7 kW
12,600 BTUH

#8/2 or #6/2

40 or 50

  1. Maximum Maintainable Heat Loss refers to the maximum heat loss each storage heater can meet based on the length of Ontario's charging periods. 
  2. Wire and Breaker sizes should be confirmed based on your local electrical code.
  3. If your Electrical Utility offers a mid-peak period as well, please for a customized storage heater selection table.

Ontario, Canada

Model

Element

Maximum Maintainable Heat Loss1
based on Ontario's TOU rate structure

Wire Size2

Breaker Size2

 

Wattage

Ontario TOU3
12 + 6

Manual4
12 + 0

(AWG)

(Amps)

QSH-070

1.56 kW

0.7 kW

0.7 kW

#14/2

15

QSH-100

2.22 kW

1.0 kW

1.0 kW

#14/2

15

QSH-125

2.76 kW

1.25 kW

1.25 kW

#14/2

15

QSH-150

3.3 kW

1.5 kW

1.5 kW

#12/2

20

VFMQ40

4 kW

3.0 kW

2.1 kW

#10/2

30

VFMQ50

5 kW

4.1 kW

2.8 kW

#10/2

30

VFMQ60

6 kW

4.7 kW

3.3 kW

#8/2

40

VFMQ70

7 kW

5.0 kW

3.7 kW

#8/2

40

  1. Maximum Maintainable Heat Loss refers to the maximum heat loss each storage heater can meet based on the length of the Utility's charging periods.
  2. Wire and Breaker sizes should be confirmed based on your local electrical code.
  3. The Ontario TOU column assumes the use of the Dimplex control panel and the intelligent use of the additional 6-hour mid-peak standard rate period for only the coldest days.
  4. When using a manual control strategy, the mid-peak period is not used for charging and therefore the lower heating capacity must be used.