Ensuring Gas Safety in Apartment Buildings: Ventilation & Compliance Guide
In order to ensure safety compliance, ventilation and gas systems must be approached holistically. Gas safety in apartment buildings depends heavily on adequate airflow. Gas systems inside apartments require sufficient air to function properly.
Every apartment building is different. Therefore, standard solutions cannot be applied to all properties. Buildings were constructed at different times. They also implemented different technical solutions. What is suitable for one building may not be reasonable for another.
If gas systems are located inside individual apartments, a proper building must meet the following key points:
An apartment building must have a compliant ventilation system. This includes both supply and exhaust ventilation.
Chimney flues for combustion gases must be in proper working order. They also require regular inspection and cleaning.
Gas appliances installed in apartments must be properly inspected. They need to be kept in good working condition.
Carbon monoxide detectors must be installed in all apartments.
Shared gas systems must undergo proper, compliant auditing.
In many cases, it is wise to upgrade the entire technical infrastructure. You can consider a modern, safe, and energy-efficient solution. One option is to replace individual gas water heaters in bathrooms with a centralised system. You can also integrate a heat-recovery ventilation system. This approach elevates gas safety in apartment buildings. It offers higher energy efficiency and potential eligibility for KredEx support schemes.
Each building requires an individual approach. Every solution has its own advantages and limitations. Therefore, it is essential to work closely with specialists and designers.
Restoring Existing Natural Ventilation and Gas Infrastructure
Renovating an existing setup ensures a safe living environment. It also creates a healthy indoor climate for residents. Renovation is more affordable than installing a modern heat-recovery system.
However, natural ventilation can increase monthly heating costs. During the cold season, costs may rise by up to 30%. Nevertheless, financial expenses are insignificant compared to human life and safety. When renovating this type of system, specific requirements must be taken into account:
Ensure Adequate Air Supply
Any room containing a gas appliance requires an air-supply opening. The door must be fitted with an opening near the floor, with a minimum size of 300 cm². A separate ventilation exhaust opening must be installed near the ceiling in its own flue. It must not be connected to the chimney flue.
The building’s exterior wall should be equipped with fresh-air intake openings. This guarantees sufficient air exchange. These exterior ventilation openings must remain open at all times.
Inspect Ventilation and Gas Flues
Exhaust flues must remain in proper working condition. Therefore, they must be inspected once a year by a certified company. This process requires a video inspection and thorough cleaning. If necessary, air-duct measurement and renovation are performed. This guarantees complete gas safety in apartment buildings.
Service Gas Appliances and Piping
Gas safety in apartment buildings requires high standards. Gas appliances must be serviced regularly according to the manufacturer’s maintenance instructions. This maintenance is the responsibility of the apartment owner.
Shared gas piping and installations also require regular inspection. If shared systems are more than 15 years old, they must be inspected once every four years. Any faulty or unmaintained equipment must be repaired or replaced immediately.
Install Carbon Monoxide Detectors
Carbon monoxide is colorless and odorless. It can be fatal within minutes and cannot be sensed or seen. If a gas appliance is located in a bathroom, a moisture-resistant carbon monoxide detector must be installed.
Renovating Technical Systems for Modern Efficiency and Safety
To modernise an apartment building, technical systems must be assessed as a whole. This ensures long-term energy efficiency. Modernizing ventilation and gas infrastructure significantly improves gas safety in apartment buildings.
It is essential to identify the optimal solution with qualified specialists. The available options depend on the condition of the building:
Has the apartment building already been renovated with insulated walls and new windows?
Is the ventilation system in place, and how has it been designed?
Has the heating system been renovated?
Is it possible to relocate gas water heaters out of the apartments into a centralised solution?
To make technical systems energy-efficient, a suitable method of heat recovery must be identified.
Central Heat-Recovery Ventilation System
In this solution, a ventilation system is installed for the entire building using a central unit. Fresh air is supplied to living rooms and bedrooms. Extract air is removed from the kitchen, toilet, and bathroom.
The ventilation unit is installed in the attic, on the roof, in the stairwell, or in the basement. For efficient implementation, the exterior façade should not yet be renovated. The ductwork is installed beneath the wall insulation.
Decentralised Heat-Recovery Ventilation System
In this solution, autonomous ventilation systems are installed in each apartment. Every unit gets its own ventilation device and independent fresh-air supply.
The main advantage is that air exchange can be individually controlled by each owner. The solution is energy-efficient. However, its drawback is the need to install ventilation ductwork within each apartment.
Combined Central Heating and Ventilation System
In this system, a heat-recovery ventilation unit is installed on the roof. It connects to a heat pump located in the heating substation. Extract air is drawn from wet rooms through ventilation shafts and discharged at the roof. The recovered thermal energy is then used to heat central heating water.
To implement this solution, individual gas water heaters must be removed from wet rooms. The system is then converted into a centralised solution.
Installation of a Central Gas Water Heater
In this solution, a central natural-gas water heater is installed in the attic or basement. A new domestic hot water system is constructed. Existing autonomous water heaters in the apartments are removed.
The major advantage is the elimination of hazard sources within individual units. This maximizes gas safety in apartment buildings while ensuring full control over equipment operation.
Installation of a Combined Heat and Power (CHP) Plant
The overall layout is similar to the central water heater solution. A central energy source is installed along with a new hot water system. A natural-gas-fired CHP unit produces both hot water and electricity.
Apartment buildings typically use small-scale CHP units starting from 5 kW. By generating heat and electricity on-site, transmission fees, distribution losses, and external energy costs are eliminated.
Final Considerations for Building Safety and Efficiency
Each building must be assessed individually based on its existing condition. The best results are achieved by combining modern systems. Although energy-efficient solutions seem more expensive at first, they are significantly more cost-effective long term.
When comprehensive renovation eliminates individual gas equipment and incorporates energy-efficiency measures, KredEx support schemes can be utilised. This applies even if the building was previously partially renovated or received funding.
It is essential to involve experienced specialists in energy-efficiency systems. When focusing on gas safety in apartment buildings, work with partners who understand the complete picture. Where standard modern solutions are not suitable, an innovative combination of systems can achieve the optimal result.