Ventilation Case Studies
In this section we share real ventilation case studies from homes across Ireland. Each example shows a common installation mistake, explains the risks for the occupants, and demonstrates how Eco Vent corrects the problem through proper design, installation, and commissioning.
Case Study 1 – Unsafe Condensate Trap Installation
During a service visit we found an improvised condensate trap built from a flexible washing machine hose, loosely connected to a waste pipe and routed beside an electrical connection. This type of DIY fix is unsafe and can lead to leaks, odours, and electrical hazards.
Key issues identified
- Washing-machine hose used as a condensate trap instead of a purpose-designed trap.
- Poor, unsealed connection to the waste pipe allowing potential leaks and odours.
- Condensate pipework routed very close to electrical cabling/connection.
- No visible access for cleaning, inspection, or safe maintenance.
Case Study 2 – Uninsulated MVHR manifolds in cold attic
In this property the MVHR supply and extract manifolds were installed in a cold attic space with no insulation around the manifold boxes or connecting ductwork. As a result, valuable heat was being lost into the attic, reducing heat recovery efficiency and increasing the risk of condensation within ducts.
Key issues identified
- Manifold boxes located fully outside the thermal envelope in a cold attic.
- No insulation to manifold bodies or connections, causing significant heat loss.
- Risk of condensation forming on cold metal/plastic surfaces and inside ducts.
- MVHR not achieving expected efficiency or comfort levels for the occupants.
Case Study 3 – MVHR unit with open condensate outlet
On another site we found an MVHR unit installed with the condensate discharge left fully open and not connected to any drain. During operation, condensate from the heat exchanger was free to drip out of the unit, risking damage to the appliance and surrounding structure.
Key issues identified
- Condensate spigot on the MVHR left open, with no trap or pipework attached.
- Risk of water leaking onto ceiling/attic structure and damaging finishes.
- Potential for mould growth around the unit due to persistent moisture.
- Evidence that the system had never been properly commissioned or signed off.