DHV-04/100B Heat Recovery Ventilation Unit – Suitable for areas up to 55sqm


£276.00 Inc. VAT

Availability: In stock

SKU: BHFP-04/100B-Unit Categories: ,

Heat Recovery Ventilation

Heat Exchanger

Enthalpic Heat Exchanger

High quality Enthalpic heat exchangers transfer heat with up to 70% efficiency to the incoming air supply without creation of excessive condensation.

Unit Specification

Model Number
Fan Motor Power (W)
Air Volume (High/Low M3/h)
Noise (dBA)
Unit Dimensions (mm)
400 x 348 x 158
Package Size (mm)
440 x 380 x 195
Spigot Diameter (mm)
Weight (kg)

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!

This unit is ideal for use in small properties like studio apartments.

Please click here to read our full “easy install” guide.

Looking for a quote? Send your plans, with dimensions and any specific requirements to admin@boulderdevelopments.com


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.

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Closing for Christmas!

Our last order date is the 23rd of December by 11 am - Our Office will be closed between Midday 24th December until the 8.30am  4th of January 2022