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Perfect 45 Instant Undersink Instant Water Heater, 4.5KW

£114.98 inc VAT
£95.82 exc VAT

Perfect 45 Instant Undersink Instant Water Heater, 4.5KW

Use this Instant Water Heater for hot water on demand

5 reviews
£114.98 inc VAT
£95.82 exc VAT

Order now for delivery 20th February

See more product details
  • In stock
  • Warranty: 2 Years
  • 30 day money-back guarantee
  • Product Code: 229093
  • Have a question? Call 0800 091 3171
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Product information

Power: 4.5 kW
Brand: HSD
Height: 15.2 cm
Width: 13.5 cm
Depth: 7.2 cm
  • This instant under sink water heater quickly and efficiently provides hot water for a wash basin with hotter water delivered than the Perfect 35 water heater.
  • Water runs through the unit and is heated up using the latest in heating element technology for efficient, instant supply
  • Traditional tank type water heaters have to heat litres of water before supplying hot water to you. So for washing your hands, you may use up to 10 litres of cold water before the hot water arrives. With an instant water heater, the water is supplied hot instantaneously cutting down on wasted water and associated bills.
  • If your basin is a distance from your central heating water source, we highly recommend installing a perfect water heater
  • Suitable for use with any taps from single to monobloc, with peak performance found with spray fittings
  • The unit will not supply a shower or bath with water.
  • 19.6 amps fuse needed
  • Minimum water pressure required 10psi or 0.7bar


Rating 5 out of 5 based on 5 reviews.
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Great item Totally recommend
20 Nov 2018
Gail Hopkinson
Good instructions..easily fitted ..seems a good quality water heater.. perfect for undersink water heating, saving me lots of money as I now don't have to heat a full tank of water for occasional use
23 Oct 2018
Had purchased before cheaper under sink heater, this started to leak within six months, got a new one under garuantee this also started to leak within three months, Decided then to get hopefully a better more expensive heater, twice the price of previous one, on opening package immediately felt it was sturdier and better made. Easy to fit, instructions ok, works well better hot water output from previous one, so far so good, but it is early days!
5 Sep 2018
Linda, Wiltshire
Really pleased compact effecient installed by husband with no difficulty
4 Dec 2014
Graham, Isle Of Wight
25 Aug 2014

Documents & Instructions

Frequently asked questions

What are the dimensions of this Perfect 45 undersink water heater please?
The dimensions are H152 x W135 x D72mm.
What voltage is needed for a 4.5 or.5.5 kw unit?
The voltage for the the Perfect range is 230 volts.
I require a unit to provide enough hot water and at a good temperature to wash up mugs and crockery in our office. What are your recommendations please?
This water heater would not be sufficient for your needs. We would recommend the Perfect 55 as an alternative. Please see product code 133365.
Can you advise me the water temperture output for this Perfect 45 instance heater?
The water temperature output will depend on the flow rate of the water. Please see below for the details:
59 degrees C at 1.5ltr/min
48 degrees C at 2.0ltr/min
41 degrees C at 2.5ltr/min
37 degrees C at 3.0ltr/min
What is the water flow at outlet tap is a full normal flow or just a trickle as I’ve recently had a instant hot water tap cold water pressure is normal for house hold tap but when you want the hot water you have to fiddle about until you get the right reading but you only get a third of the water power in other words it’s just a trickle ???????????
The flow rates and temperatures achieved for the Perfect 45 are:

1.5L/min 59°C
2L/min 48°C
2.5L/min 41°C
3L/min 37°C
do you have that I can us in bathroom
This water heater can be used to supply water to a hand wash basin in a bathroom.
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