I.A.Q
Ashrae 62.1 Standard • ASHRAE Standard 62.1, Ventilation for Acceptable Indoor Air Quality, is the industry guideline defining ventilation requirements for a variety of commercial applications. Key points: Humidity levels in building to be less than 65% Indoor air is often more polluted than outdoor air. Many people spend as much as 90% of their time indoors, especially the very young, the very old and the ill . ASHRAE Standard determines the acceptable indoor air quality levels: E.g. Relates more commonly to C02 levels in a commercial building. Air quality can be improved by removing the source of contamination, filtering and ventilating . Duct systems should be cleaned if there is excessive dirt, infestation or mold growth.
There are many indoor air pollutants . Older homes allow pollutants to enter. Newer structures are tighter.• Outside air must be brought into the structure . Inadequate ventilation can cause Window and wall condensation . Formation of mold and smelly, stuffy air.
RHC Mechanical provides a solution to control indoor air quality.
UV air purification: Harmful chemicals, mold, germs, allergens, and other contaminants can be present in our air whether we know it or not. Sadly, air filters aren’t enough to remove the majority of pollutants that circulate in your home. Restore is an in-duct air purifier that is proven to detoxify air and get rid of common sources of indoor air pollution within hours effectively.
Mechanical filter: Fiberglass disposable, pleated, cube, pocket, High Efficiency Particulate Air filter.
Electronic Air Cleaners: Electronic air filters use the principle of electrostatic precipitation to collect airborne particles. The filter will impose a static electrical charge on all dirt particles carried along the airstream. Those particles are then attracted to a negatively charged collector plate. These electronic filters will come with a pre filter to pick up any large micron debris like lint & hair. This filter will need to be washed or replaced depending on type The electronic filter elements will need to be removed and cleaned as per manufacturer instructions during maintenance . These filters can operate as high as 10,000 DC volts
HRV: Heat Recovery Ventilator.
ERV: Energy Recovery Ventilator .
Difference between HRV AND ERV: Booths are similar as both supply fresh air to home and exhaust stale/stagnant air from the home. Air exchange never mixed, but when passed through a heat exchanger to exchange temperature through conduction. ERV transfer both temperature and can retain or transfer moisture. HRV transfer temperature only.
AIR HUMIDIFICATION: Relative humidity is the percentage of moisture in the air compared to the maximum capacity of an air sample to hold moisture and Relative humidity is the percentage of moisture in the air compared to the maximum capacity of an air sample to hold moisture. Recommended humidity for homes is 40 to 60% and people can be comfortable at lower temperatures if the humidity is higher. Mostly used these two types
- Evaporative humidifiers – use a wet media
- Air is passed over the media and the water evaporates
- Operate bypass dampers during the proper season. If left open during the cooling season you could overcool return air causing the EVAP to ice up.
- Filter pad requires replacement periodically depending on water quality and use
- Electrically heated humidifiers (steam)
- Water evaporated by electric heating
elements (High voltage, 120v or 208V) - The steam canisters require replacement
- Water evaporated by electric heating
Preventative maintenance
Preventive maintenance on your HVAC-R system will not only ensure that the equipment is operating at maximum efficiency, but it will also extend the life of that equipment. Government research shows that a regular tune-up of your heating and cooling system will
save you money in the long run because of reduced energy costs. The high efficiency air
conditioners on the market now can cut electric bills significantly but only if they are properly maintained. Most manufacturers of heating and cooling equipment require annual preventive
maintenance on their equipment to maintain the warranty.