Determining

Determining HVAC System Cleanliness  HVAC system cleanliness should be evaluated by visual inspection or an approved vacuum test method as outlined in appropriate NADCA standards. An HVAC interior surface is considered visibly clean when it is free of non-adhered debris. Vacuum test methods include visual surface comparison of “clean” areas before and after vacuuming as well as sampling a known surface area to determine the net weight of debris per area sampled to compare to an acceptable NADCA level.

The scope of work

(A) The scope of work for this project will include cleaning of all HVAC ductwork and accessories
at the Putnam Elementary School, Middle School and High School. The extent of ductwork to be
cleaned shall be determined by review of available construction documents and field verification.
(B) The Contractor shall be responsible for the removal of visible surface contaminants and
deposits from within the HVAC system in strict accordance with these specifications.
(C) The HVAC system includes any interior surface of the facility’s air distribution system for
conditioned spaces and/or occupied zones. This includes all Heating, Ventilating and Air
Conditioning systems from the points where the air enters the system to the points where the air is
discharged from the system. The return air grilles, return air ducts to the air handling unit (AHU),
interior surfaces of the AHU, mixing box, coil compartment, condensate drain pans, supply air
ducts, fans, fan housing, fan blades, turning vanes, filters, filter housings, reheat coils, and supply
diffusers are all considered part of the HVAC system. The HVAC system may also include other
components such as dedicated exhaust and ventilation components and make-up air systems.
The Kitchen Hood Exhaust systems are not included in the scope of work.

frameworks

The UCIAQ Committee demoralizes the utilization of concoction sanitizers or biocides to treat building supply and return ventilation work. Albeit numerous antimicrobial items are EPA endorsed for utilization on hard, non-permeable surfaces, these items were not particularly intended for utilization in HVAC frameworks and have not been assessed for potential inhabitant wellbeing presentation issues.

2.08 POST PROJECT REPORT

2.08 POST PROJECT REPORT
(A) At the conclusion of the project, the Contractor shall provide a report to the owner indicating
the following:
1. Success of the cleaning project, as verified through visual inspection and/or
gravimetric analysis.
2. Areas of the system found to be damaged and/or in need of repair.

If visible contaminants

If visible contaminants are evident through visual inspection, those portions of
the system where contaminants are visible shall be re-cleaned and subjected to
re-inspection for cleanliness.
3. NADCA vacuum test analysis should be performed by a qualified third party
experienced in testing of this nature.
(C) Verification of Coil Cleaning
1. Cleaning must restore the coil pressure drop to within 10 percent of the pressure
drop measured when the coil was first installed. If the original pressure drop is
not known, the coil will be considered clean only if the coil is free of foreign matter
and chemical

CLEANLINESS VERIFICATION

 CLEANLINESS VERIFICATION
(A) General
Verification of HVAC System cleanliness will be determined after mechanical cleaning and before
the application of any treatment or introduction of any treatment-related substance to the HVAC
system, including antimicrobial agents and coatings.
(B) Visual Inspection
The HVAC system shall be inspected visually to ensure that no visible contaminants are present.
1. If no contaminants are evident through visual inspection, the HVAC system shall
be considered clean; however, the owner reserves the right to further verify
system cleanliness through Surface Comparison Testing or the NADCA vacuum
test specified in the NADCA standards.

Antimicrobial Agents and Coatings

 Antimicrobial Agents and Coatings
1. Antimicrobial agents shall only be applied if active fungal growth is reasonably
suspected, or where unacceptable levels of fungal contamination have been
verified through testing.
2. Application of any antimicrobial agents used to control the growth of fungal or
bacteriological contaminants shall be performed after the removal of surface
deposits and debris.
3. When used, antimicrobial treatments and coatings shall be applied in strict
accordance with the manufacturer’s written recommendations and EPA
registration listing.
4. Antimicrobial coatings shall be applied according to the manufacturer’s written
instructions. Coatings shall be sprayed directly

All methods require

All methods require mechanical agitation devices to dislodge debris adhered to
interior HVAC system surfaces, such that debris may be safely conveyed to
vacuum collection devices. Acceptable methods will include those, which will not
potentially damage the integrity of the ductwork, nor damage porous surface
materials such as liners inside the ductwork or system components.
(D) Cleaning of Coils
1. Any cleaning method may be used which will render the Coil Visibly Clean and
capable of passing Coil Cleaning Verification (see applicable Industry Standards).
Coil drain pans shall be subject to Non-Porous Surfaces Cleaning Verification.
The drain for the condensate drain pan shall be operational. Cleaning methods
shall not cause any appreciable damage to, displacement of, inhibit heat transfer,
or erosion of the coil surface or fins, and shall conform to coil manufacturer
recommendations when available. Coils shall be thoroughly rinsed with clean
water to remove any latent residues.

All vacuum

All vacuum devices exhausting air outside the facility shall be equipped with
Particulate Collection including adequate filtration to contain Debris removed from
the HVAC system. Such devices shall exhaust in a manner that will not allow
contaminants to re-enter the facility. Release of debris outdoors must not violate
any outdoor environmental standards, codes or regulations

Features

Features    * CE Certificated    * Range from ¾" to 2"    * Flow Restrictor as standard    * Flow Regulation from 0 to 100%    * Full-wave Rectified Coil for quiet operation    * Normally Closed operation    * 200mbar maximum working pressure    * Pressure Test Points on Inlet and Outlet    * Approved to EN161 Group 2, Class A    * Available as Fast or Slow Opening    * Built in filter    * Available with Closed Position Indicator Switch    * 230V, 110V and 24V AC 50/60Hz Versions    * Range of accessories available    * Supplied with PG11 Cable Gland

Series 2000

Series 2000 is a range of Solenoid Operated Safety Shut-off Valves. Their primary application is the on/off control of low pressure 1st (town gas), 2nd (natural gas) and 3rd (LPG) family gases, although they may also be used as control valves for devices such as automatic burners and for low pressure air applications.
The valves are available in screwed connections from ¾” up to 2” and have Flow Adjustment as a standard feature. Slow Opening valves are available and CPI Switches are available as an extra. All valves are supplied with plugged Pressure Test Points in both Inlet and Outlet Ports on both sides of the valve.
The valve construction is of an aluminium die-cast body with a solenoid actuator and is maintenance free. There are no user serviceable parts to the valve. Upon being energised, the fast opening valve will open instantaneously whilst the slow opening valve will open.

Pressure Sender

Pressure Sender The differential gas pressure proving method, as developed and patented by Medem, operates by measuring the pressure differentially across the inlet and the outlet of a gas isolation valve using micro transducers. All other systems can only see the gas pressure when the valve is open.
Differential proving enables the supply pressure to be measured before the associated isolation valve is opened. This means that in the event of gas over pressure or under pressure the valve would remain safely shut and reported on the system LCD

Carbon Dioxide

Carbon Dioxide Sensor CO2 detection is designed to deal with its production either via cooking or biological processes (namely breathing).  
CO2 is roughly equal weight and density as air it will therefore naturally diffuse equally within a space.
CO2 detectors are for the purpose of monitoring the air quality within an area to ensure adequate ventilation is taking place, as such the detectors should be located with the main body of the room within the “breathing zone” (4 to 8 feet) but not in such a place they'd likely be exposed to a potential release point (i.e. someone breathing on it).

Current Monitoring

Current Monitoring It is a requirement that any mechanical ventilation within a kitchen environment (both supply and extract) is switched on and running before the use of any gas appliances can take place.
With the VGPS-K if the ventilation is not switched on, the LCD display informs the operator that the fans are off and to switch on the fans and restart the panel.
With the fans on and running the system will then perform a down- stream integrity check using our patented “Differential Pressure Proving” metho

Kitchen Ventilation

Kitchen Ventilation Controls Our unique kitchen ventilation controls and intelligent sensors have been developed to deliver optimum control and ease of use of all our ventilation systems.
The VGPS - K - CO 2 offers a complete single panel package patented by our controls specialist
The system is easy to use because an LCD display gives solutions and full status information.
The system ensures all fans are running before gas can be used. It also carries out a gas pressure prove on the cook line and continually checks that the incoming gas pressure is sufficient.
In addition, it monitors the carbon dioxide level to ensure that HSE set levels are not exceeded. Should the carbon dioxide level rise above 2,300ppm the panel LCD will advise staff to increase the ventilation fan speed at the speed controllers.” The maximum allowed level of carbon dioxide is 2,800ppm, as published in HSE catering sheet 23 revision 1

Framework

Framework counts are rapidly accessible by entering the machine subtle elements and the planned kitchen covering setup and measurements into our icalc estimating framework.

We work nearly with neighborhood powers, M&e Engineers and primary builders to guarantee full agreeability to current enactment.

Airtherm's outline office, contract designers and site establishment groups have an extensive variety of learning and experience.

Ventures are done to guarantee full consistence with all statutory necessities and guidelines.

Whatever the prerequisites of your undertaking, we promise an answer of the most astounding quality, that has been thoroughly tried and offers remarkable execution in its field.

Autocad drawings are created by our profoundly encounter group of specialists for endorsement

stains in your bathroom

Are there stains in your bathroom, discolouration around window sashes and layers of dust on the top of bookcases and wardrobes? A general lack of ventilation can cause a build up of moisture and stale air, inevitably leading to mould, dust and bad odours. Preventing indoor air quality problems can be affordable and easy, and you’d be surprised how much easier it will make cleaning your home.

Most importantly, effective ventilation ensures you and your family are living within a healthy environment. Reducing the amount of dust in your home will help everyone breathe easier, while moulds are probably the most common source of indoor air pollution, causing allergies, headaches, and respiratory problems.

Fixing cracks, damp-proofing or improving drainage will help correct moisture problems. If water is leaking in from outside, it’s extremely important that it is corrected.
In order to achieve effective ventilation within a room, the openings through which air exits the house should be larger than those where it enters. Ventilation openings should be in excess of 10 per cent of the floor area of each room.

The amount, style, and size of windows are critical, while the placement of most windows depends on movement of air due to outside pressure differences.

smell stale or smelly

Does you home ever smell stale or smelly? A basic answer for indoor air-quality issues is great ventilation. Promontory Living takes a gander at methods for keeping your home surroundings sound and your family free of mold-related afflictions.

home ever

Does you home ever smell stale or musty? A simple solution to indoor air-quality problems is good ventilation. Peninsula Living looks at ways of keeping your home environment healthy and your family free of mould-related ailments.

excessive temperatures down

• Keeping excessive temperatures down. A facility may have minimum and maximum operating temperatures for optimum plant efficiency, for storage and processing of materials and to ensure comfortable working conditions for its staff.
• Providing ventilation whilst avoiding noise from breaking out – this can impact on the local environment.
• Providing ventilation in all weather conditions.
• Providing good indoor air quality, without excessive humidity, dust, fumes or odours.
• Ensuring that there is inlet air to provide sufficient over-pressure to ensure ventilation efficiency and to prevent dust and other external contaminates from infiltrating the building.
• Avoiding the risk of explosion if there is an explosive atmosphere.
• Protecting people, goods, machinery and buildings from the risk of fire, and enabling fire fighting access.

Colt offers

For industrial buildings Colt offers solutions for natural day-to-day ventilation with the optional benefit of smoke ventilation, or hybrid natural and mechanical ventilation systems including evaporative cooling and heating.

The design approach depends on the use of the building. Colt operates in a wide variety of industries, providing tailor made climate control systems to meet the specific requirements of each.

For example, our systems for the food industry need to take account of the need for constant temperature and humidity levels to guarantee food safety.

Our natural ventilation systems are particularly well suited to larger buildings where there are manufacturing processes that produce relatively high levels of heat, such as in glass industry, foundries and power stations, but they are also found in other industries such as plastics and metal working. Infact, our natural ventilation systems can be found where all kinds of manufacturing and storage takes place, including in the food, engineering, chemicals, paper, and mining industries.

Our evaporative cooling systems are often employed in production or storage facilities where conventional air conditioning systems would not be cost-effective, and where natural ventilation cannot provide the required conditions.

building is refurbished

When a building is refurbished, Colt is able to unlock considerable potential for improvements in energy performance, fire safety and appearance. Colt experts can carry out detailed surveys to identify the necessary adaptations and upgrades to optimise the system's effectiveness and performance.

Colt industrial ventilation systems

Colt industrial ventilation systems

Our industrial ventilation systems harness the natural elements to create ideal internal working conditions in industry. We design ventilation systems that ensure that temperatures remain at the desired level and that productivity is enhanced.

California Air Resources

In September 2007, the California Air Resources Board announced a ban of in-home ozone producing air purifiers. This law, which took effect in 2009, will require testing and certification of all types of air purifiers to verify that they do not generate excessive ozone. This ban does not affect shock treatment ozone generators for commercial and industrial use.

Ozone generator

Ozone generators used for shock treatments (unoccupied rooms) which are needed by smoke, mold, and odor remediation contractors as well as crime scene cleanup companies to oxidize and permanently remove smoke, mold, and odor damage are considered a valuable and effective tool when used correctly for commercial and industrial purposes. However, there is a growing body of evidence that these machines can produce undesirable by-products.^[22]

Ozone

Ozone can damage the lungs, causing chest pain, coughing, shortness of breath and throat irritation. It can also worsen chronic respiratory diseases such as asthma and compromise the ability of the body to fight respiratory infections—even in healthy people. People who have asthma and allergy are most prone to the adverse effects of high levels of ozone.^[19] For example, increasing ozone concentrations to unsafe levels can increase the risk of asthma attacks.

consumer concerns

consumer concerns[edit]

Other aspects of air cleaners are hazardous gaseous by-products, noise level, frequency of filter replacement, electrical consumption, and visual appeal. Ozone production is typical for air ionizing purifiers. Although high concentration of ozone is dangerous, most air ionizers produce low amounts (<0.05> ppm). The noise level of a purifier can be obtained through a customer service department and is usually reported in decibels (dB). The noise levels for most purifiers are low compared to many other home appliances.^{[citation needed]}Frequency of filter replacement and electrical consumption are the major operation costs for any purifier. There are many types of filters; some can be cleaned by water, by hand or by vacuum cleaner, while others need to be replaced every few months or years. In the United States, some purifiers are certified as Energy Star and are energy efficient.

Polarized-Media Electronic Air Cleaners

• Polarized-Media Electronic Air Cleaners use an active electronically-enhanced media to combine elements of both electronic air cleaners and passive mechanical filters. Most Polarized-Media Electronic Air Cleaners convert 24 volt current to safe DC voltage to establish the polarized electric field. Airborne particles become polarized as they pass through the electric field and adhere to a disposable fiber media pad. Ultra-fine particles (UFPs) that are not collected on their initial pass through the media pad are polarized and agglomerate to other particles, odor and VOC molecules and are collected on subsequent passes. The efficiency of Polarized-Media Electronic Air Cleaners increases as they load, providing high efficiency filtration with air resistance typically equal to or less than passive filters. Polarized-media technology is non-ionizing which means no ozone is produced.

Ultraviolet germicidal irradiation

• Ultraviolet germicidal irradiation - UVGI can be used to sterilize air that passes UV lamps via forced air. Air purification UVGI systems can be freestanding units with shielded UV lamps that use a fan to force air past the UV light. Other systems are installed in forced air systems so that the circulation for the premises moves micro-organisms past the lamps. Key to this form of sterilization is placement of the UV lamps and a good filtration system to remove the dead micro-organisms. For example, forced air systems by design impede line-of-sight, thus creating areas of the environment that will be shaded from the UV light. However, a UV lamp placed at the coils and drainpan of cooling system will keep micro-organisms from forming in these naturally damp places. The most effective method for treating the air rather than the coils is in-line duct systems, these systems are placed in the center of the duct and parallel to the air flow.

Thermodynamic sterilization (TSS)

• Thermodynamic sterilization (TSS) - This technology uses heat sterilization via a ceramic core with micro capillaries, which are heated to 200 °C (392 °F). It is claimed that 99.9% of microbiological particles - bacteria, viruses, dust mite allergens, mold and fungus spores - are incinerated.^[3] The air passes through the ceramic core by the natural process of air convection, and is then cooled using heat transfer plates and released. TSS is not a filtering technology, as it does not trap or remove particles.^[4] TSS is claimed not to emit harmful by-products (although the byproducts of partial thermal decomposition are not addressed) and also reduces the concentration of ozone in the atmosphere.^[5]

Insulation

Insulation

A well-insulated home will retain heat in winter and keep heat out in summer. Ceiling insulation is particularly important to keep the hot sun from overheating your home - and painting your roof a light colour will reflect sunlight, meaning that less heat penetrates through the ceiling.

Don’t forget your windows when you think about insulation.  Double glazing, low emissivity glass and tinted glass all help keep the heat out as well as keeping the warmth in.

See Insulation and Glazing for more.

Adjustable shading options

Adjustable shading options

Adjustable shading provides flexibility. It can be especially useful where you need to deal with low-angle morning or evening sun.

External shading options stop the sun getting to your windows at all - these will keep your home cooler, but thick thermal-lined curtains can still be effective, especially with a window open to let the heat back out.

Adjustable shading options include:

• manually-adjustable louvres
• shutters
• thick thermal-lined curtains
• sliding screens
• retractable awnings and sails
• removable shades that can be taken down at the end of summer.

Adjustable shading may be combined with fixed eaves or pergolas to provide deep shade in summer, but allow winter sun into these areas.

Actively adjust your shading to keep your home cool. For example, if you have curtains:

• adjust east-facing curtains to keep out all morning sun but open them in the afternoon to let in some light
• close west-facing curtains and blinds to keep out hot afternoon sun
• if you'll be out all day in summer, leave the curtains closed.