Hot Water Cylinder News

McDonald Engineers Calorifiers

McDonald Engineers recently supplied an 1800 Litre POWERflow Commercial Calorifier for Perth Grammar School.  We manufacture a large range of Calorifiers and Buffer Vessels.  These can be adapted for heat pump or solar thermal input. Our flexibility of manufacture, allows Calorifiers to be manufactured to your specification and requirements.  Please contact us for prices and details.  

POWERflow 2000 Unvented Mains Pressure System Installation Course.

Another successful POWERflow 2000 Unvented Mains Pressure System course has been completed. If you require to sit the course please contact us for details, as dates can be arranged to suit. The course involves a tour round our factory to see the manufacturing process for copper cylinders. We have a demo display with our Unvented Cylinder and also our THERMflow Thermal Store and also a solar cylinder. Anyone wishing a factory tour is more than welcome at any time please contact to arrange a suitable time.

Spares Page

We now have a page on our website for our Hot Water Cylinder Spares. Here you can browse for:

  • Unvented Cylinder Spares
  • Thermal Store Spares
  • Calorifier Spares
  • Parts for Plumbing Units
  • Vented Copper Hot Water Cylinder Spares

We also stock a wide range of spares such as

Online Competition

McDonald Engineers are happy to announce the launch of our new online competition. We would like you to give us your opinion on the various aspects of our website. If you could answer the 3 questions below:-
  1. How easy was our website to find?
  2. What do you use our website for?
  3. What areas of the website do you think we could improve upon?

Prize Winners

Following our successful survey, our Technical Sales Manager Stuart Graham visited each of the lucky winners to hand over their prize of Veuve Clicquot Champagne.


Jonathan Green (Graham The Plumbers Merchant Dundee)


Customer Survey

McDonald Engineers recently completed a customer survey, to find if there were any areas of our service we could improve.  To encourage participation, there were three individual bottles of Veuve Clicquot Champagne as prizes, for a lucky 3 drawn from the entries.


The winners of the champagne were Doug Gordon of William Wilson in Elgin, Jonathan Green of Grahams Dundee and Stephen Smith of PTS Kinning Park Glasgow.