Heat Recovery Ventilation
SELECT YOUR UNIT
See the “HRVU Units” section below for detailed information on our great selection of units.
SELECT UNIT FUNCTIONALITY
Choose from the normal, pre-heat and auto bypass systems available, read our “Functionality” section for more details.
Functionality
Following is an explanation on the functionality available in our units. If you are unsure about any details and what would suit you best, please contact us, we’d be happy to help!
Normal
Our standard units operate with up to 3 speeds, delivering flexibility to your system. Supplied with a manual switch. |
Pre-Heater
Our pre-heater units warm the incoming air before it enters the heat exchanger, allowing more heat to be circulated throughout your home. Comes complete with an LCD control panel. |
Auto Bypass
Our auto-bypass units are able to bypass the heat exchanger when the external temperature is 20°C or higher. Comes complete with an LCD control panel. |
Heat Exchanger
 |
High Performance Heat Exchanger
Our High Performance Aluminium heat exchangers have been designed and manufactured for customers who demand the highest efficiency in their systems. Boasting extremely high heat transfer values (up to 90%), these units provide top quality performance at extremely competitive prices. |
Unit Comparison Chart
| Model Number (Standard Unit) |
DHV-15B
|
DHV-20B
|
DHV-25N
|
DHV-35N
|
DHV-50N
|
DHV-100N
|
|---|---|---|---|---|---|---|
| Fan Motor Power (W) |
60/50
|
68/52
|
105/125/115
|
140/125/115
|
190/175/150
|
450/375/330
|
| Air Volume (High/Mid/Low M3/h) |
150/130/110
|
200/170/150
|
250/220/160
|
350/310/270
|
500/450/360
|
1000/780/650
|
| Noise (dBA) |
38
|
39
|
35
|
36
|
38
|
41
|
| Unit Dimensions (mm) |
746x507x240
|
746x507x240
|
1075x784x270
|
1075x924x270
|
1130x1106x312
|
1488x1246x396
|
| Package Size (mm) |
805x575x315
|
805x575x315
|
1125x830x345
|
1125x985x345
|
1190x1150x386
|
1545x1300x470
|
| Spigot Diameter (mm) |
100
|
150
|
150
|
150
|
200
|
250
|
| Weight (kg) |
19
|
19.5
|
33
|
38
|
54
|
89
|
HRVU Guide
Heat Recovery Ventilation (also known as HRV, or mechanical MHVR) is an energy recovery system whereby a household or room is provided with fresh air from outside. Stale air from inside is exhausted after the heat from it has been transferred to the fresh incoming air via a heat exchanger.
As buildings are made efficient they are intentionally made more air tight, and consequently they are less well ventilated. Trickle vents or simply opening a window provide fresh air, but unfortunately heat will be lost in the winter and gained in the summer. HRV systems provide a household with climate control and promote energy efficiency!
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| This is an example of an installation with one inlet or outlet per room. With this set up, you would extract from your wet rooms (kitchen, bathrooms)& push into your dry rooms (Living rooms, bedrooms). | This is an example of an installation with two inlets / outlets per room. With this set up, you would extract and push into each room. Normally the fresh air vent would be placed as far away from the door as possible. |
