Filter / Guides

HEPA filters & SMART Air Filters catch airborne dust, pollen, allergens, viruses
Healthy indoor air quality

Buying guide for home air filters in furnaces - HEPA, SMART or Regular?

...filters exist that changes the filtering efficiency, whether it is designed to filter out viruses, and how long a filter remains effective at cleaning the inside air. A clogged air filter in your home means dirty internal air quality and an inefficient furnace Are air filters for furnaces washable? Some filte...

The importance of Cleaning HRV intakes
HRV and ERV

How to keep your HRV clean and operating efficiently

...filter was also dirtier than I expected There was not enough debris (or dead bugs) on the core to make a difference in performance, but it did indicate to me that my current cleaning schedule for my other machine was not frequent enough. The filter was also dirtier than I expected in such a short time, further conv...

LEED Homes

The 19 LEED for Homes Prerequisites

...filters Forced air systems must have air filters with a minimum efficiency reporting value (MERV) ≥ 8 and ensure that air handlers can maintain an appropriate system pressure drop. Air filter housings must be airtight to prevent bypass or leakage. 9.1 Radon-resistant construction: Homes in high-risk radon gas are...

Wildfire Smoke & How to Keep it Outside Homes
Healthy indoor air quality

How to keep wildfire smoke out of Green Homes with mechanical ventilation systems?

...Filtering can also help control air pollutants, but only if the filter is adequate. According to the US EPA, a HRV or ERV unit filter must have a Minimum Efficiency Reporting Value (MERV) of 13 to provide effective protection against particulate matter in the air we're going to breath inside a home or office building i...

Which Houseplants are Best to Clean Air & Remove Toxins?
Healthy indoor air quality

Which houseplants are best for purifying air? Ecohome investigates

Do house plants clean indoor air? The idea that house plants filter and clean indoor air is at best a mini-truth, and at worst a total myth, and like any pseudo-science health trend, it can have a negative impact as well. Providing false solutions to human health issues gives people a false sense of security. Having...

Hydraloop gray water recovery and treatment systems
Greywater Recycling

At last, a compact & easy to maintain solution for gray water recycling & treatment - the Hydraloop

...filters or membranes to treat the water, which clog and need regular maintenance. The unique technology at the heart of Hydraloop, removes dirt, soap and other pollution from your bath, shower and washing machine water without using a filter or chemicals. Best news still, Hydraloop automatically cleans itself every few...

Saving Energy in Swimming Pools and Hot Tubs - Our Top Tips to Save Money
Natural swimming pools and ponds

Top tips for energy efficient swimming pools - reduce pool cleaning & running costs

...filters for you to choose from too: cartridge, DE, or sand filters. Whichever one you choose ultimately determines the amount of energy you use. The cartridge filter doesn't require backwashing like the other two filters and is the most energy efficient because of its low resistance to water flow. But from time to time...

Rain barrels for storm water management and rainwater harvesting
Rainwater Collection & Watering

Introduction to rainwater harvesting

...Filtering only the small amount of water used for drinking with passive filters such as the ceramic filter shown to the right, or with slow sand filters, greatly reduces system cost, and offers an affordable solution for people needing clean drinking water.

Off-grid and Net-Zero Housing

A Toronto Off-grid home 20 years later; how did it fare? How could it be optimized?

...filters), water passes through a Waterloo Biofilter . The system is designed to treat 600 litres of rainwater per day, which is done without using any chemicals. Water is first filtered by charcoal, purified with ultraviolet light, then stored in the underground tank, which is covered with a layer of limestone to neu...

Living green wall
Healthy indoor air quality

Living walls: what they do and don't do

...filter with your lungs. We think it's important to take steps to mitigate that, but due to the economies of scale (the volume of air compared to the amount of plants), when you factor in all the variables, it's hard not to conclude that the only truly viable way to improve air quality comes from mechanical solutions ...

Problem areas of air leakage in a home and blower door test being cond
Air and vapour barriers

Airtight Construction of Homes is Essential: "Your house sucks." "Oh yeah? your house blows!"

...filters of higher quality. That would be the MERV rating of a filter (Maximum Efficiency Reporting Value), which determines the amount of particulate they collect and the quality of air they expel. As a bench mark, the LEED rating system lists MERV 11 as a 'good' quality , MERV 13 as 'excellent'. The higher the number ...