Water Underfloor Heating Running Costs

Water Underfloor heating is usually more energy-efficient than warm water radiators or electric underfloor heating, so the running cost is lower.

This is because the heat emitted from an underfloor system is more evenly distributed than heat from a single radiator, so the system can use water at a lower temperature, It's usually between 27°C and 31°C

The running cost will also depend on a lot of other factors, including:

· How energy efficient your home is

· Room size

· Using time

Please see the running costs table below:

	Per Day	Per Month	Per Year
10㎡	£0.12	£3.6	£45
20㎡	£0.24	£7.2	£90
30㎡	£0.36	£10.8	£134
40㎡	£0.48	£14.4	£180
60㎡	£0.72	£21.6	£270
80㎡	£0.96	£28.8	£360
100㎡	£1.20	£36	£450
120㎡	£1.44	£43.2	£540
140㎡	£1.68	£50.4	£630
160㎡	£1.92	£57.6	£720
180㎡	£2.16	£64.8	£810
200㎡	£2.40	£72	£900
220㎡	£2.64	£79.2	£990
240㎡	£2.88	£86.4	£1080

Water Underfloor Heating Heat Output Tables

Underfloor Heating Heat Output– 12mm and 16mm Pipe

Pipe size: 16mm

Room Temperature	Pipe Spacing(mm)	Flow Temp(^oC)	Output(W/m sq)	Floor Temp(^oC)
18^oC	150	40	54	24
		45	68.5	25
		50	83.5	26
		55	99	28
	200	40	48	23
		45	62	24
		50	75	25
		55	89	26
	250	40	43.5	22
		45	56	23
		50	68.5	24
		55	81	25
21^oC	150	40	44	26
		45	59.5	27
		50	74.5	29
		55	90	30
	200	40	40	25
		45	54	26
		50	67	27
		55	81	28
	250	40	36	24
		45	49	25
		50	61	26
		55	73.5	27

Pipe size : 12mm

Room Temperature	Pipe Spacing(mm)	Flow Temp(^oC)	Output(W/m sq)	Floor Temp(^oC)
18^oC	150	40	34	21
		45	44	22
		50	53	23
		55	63	24
	200	40	31.5	20
		45	43.5	21
		50	55.5	22
		55	66.5	23
	250	40	28.5	19
		45	39	20
		50	50	21
		55	60.5	22
21^oC	150	40	41	26
		45	56.5	27
		50	72	29
		55	86.5	30
	200	40	37	26
		45	51	27
		50	65	28
		55	78	29
	250	40	33.5	25
		45	46	26
		50	59	27
		55	71	28