September 7, 2017

The First 475 Product: Rotary Switch for Lunos

The newest item in 475’s inventory is the first developed in-house. We’re proud to announce the arrival of the Rotary Switch, also known as ‘The Miceli’ in honor of its inventor, for Lunos e2 and eGO heat recovery ventilation fans. Our mission is to be a catalyst that pushes North American construction toward high performance, […]

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August 8, 2017

Ventilation That Keeps Affordable Housing Occupants & Owners Happy

The Presentation 475 gave a presentation on minimizing mold risk in high-performance buildings at a Maryland Affordable Housing Coalition event in Baltimore recently. In the audience were a number of affordable housing developers. During the talk we discussed the importance of airtightness, thermal-bridge-free construction, and good ventilation. The response from the housing developers, who were […]

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November 15, 2016

LUNOS Ventilation FAQ

Lunos HRV systems are a great way to add healthy, balanced and efficient ventilation to your project. For cold climate ventilation we offer three primary products: the Lunos e², Lunos eGO, and Lunos NExxT. This post is mainly about the e² and eGO systems, each of which consists of through-wall paired fan units with regenerative heat recovery cores. These […]

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May 5, 2016

Ventilation’s Energy Problem: Most Of It Just Sucks

Inaugural post of the Turning BS into Building Science series by Lucas Johnson Most often, ventilation sucks. When I was the third contractor enrolled in Energy Upgrade CA, I enjoyed being on the cutting edge of high performance building. However, ventilation was repeatedly one of the biggest challenges we faced as a state trying to push for affordable […]

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January 14, 2016

Affordable Net Zero Ready Housing on Cape Cod uses Lunos HRV Ventilation

The Residences at Melpet Farm look, at first glance, like a typical suburban development. There’s a mix of 27 one-, two-, and three-bedroom units housed in 8 farmhouse-style townhouses, clustered around a common green. But this development in Dennis, MA is actually a $7 million project overseen by Preservation of Affordable Housing (POAH) that was designed by Brown Lindquist Fenuccio & Raber Architects, […]

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December 7, 2015

Which Switch is Which? A Guide to Operating your Lunos System

Whether you’re an architect, a contractor, or a building owner, knowing how to operate the Lunos HRV system will help your building and its occupants get the most out of balanced, decentralized heat recovery ventilation. This guide will ensure that you’re set up for success. How it works: the system as a whole The basic Lunos unit is a through […]

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June 8, 2015

What’s Nexxt for Lunos?

During my recent visit to Lunos in Berlin I was introduced to their newest high performance ventilation systems.  475 will introduce the following exciting solutions as soon as they are available: the Nexxt – a semi-central HRV with heat recovery efficiency of up to 90%, delivering ventilation up to 60CFM (winter 2015/16) RA 15-60 – […]

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March 10, 2015

Lunos e²: A Zero Energy Home Solution

475 is proud to host this guest article from Michelle Tinner – a graduate student at SUNY Environmental Science and Forestry, MS candidate for Sustainable Construction Management (contact: michelle.tinner*at* Last year, a student team from Syracuse University, SUNY Environmental Science and Forestry, and Onondaga Community College competed in and won the first annual U.S. Department of Energy Challenge […]

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August 5, 2014

475 Video: Introduction to the Lunos Heat Recovery System

One of our most commonly asked questions is: “How does the Lunos work?” That’s easiest to explain with a visual.   Lunos Product Pages If you need to get deeper into the specifics, we have a few different blog posts that get you there, including: The Lunos e² Primer Introducing the Lunos eGO Lunos e²: A Zero […]

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July 14, 2014

Introducing the Lunos eGO

When you need to ventilate a single small room, including bathrooms, the Lunos eGO is the solution.  The eGO is an all-in-one room ventilation system with a built-in regenerative heat recovery core.  It operates using the same tried-and-trusted balanced ventilation with heat recovery as the Lunos e², but with the eGO both the supply and exhaust functions […]

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January 23, 2014

475 Video: LUNOS e² Installation Guide

To make the Lunos e² system installation as clear and simple as possible we’ve produced the below video installation guide.   The guide is a quick but thorough step-by-step walk-through the complete installation process.   We hope you find it useful. LUNOS e2 INSTALLATION GUIDE VIDEO Related Blog Posts Sizing Lunos E2 through-wall ventilation units No […]

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December 12, 2013

475 Visits LUNOS and LAMILUX Factories in Germany

Late this November 475 partner Floris Keverling Buisman headed to Germany to visit two of our manufacturers.  475 imports a selection of first class “Made in Germany” products, and visiting their factories is a great way to better understand the products as we see first hand how they are made and which elements make them […]

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May 22, 2013

Project Spotlight: Yellow Springs, Ohio

Andrew Kline of Green Generation Building is putting the final touches on his new high performance home in Yellow Springs, Ohio.  The house is approximately 1,700 sf with three bedrooms and  1.5 baths.  Andrew used the Passive House Planning Package (PHPP) to optimize the building performance to Passive House standards but is not seeking certification. The wall […]

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May 14, 2013

475 Presentation: Decentralized High Efficiency Ventilation

Decentralized High Efficiency Ventilation is a high performance alternative to centralized, ducted systems for whole house ventilation. As buildings are being renovated or built airtight to meet greater demands of low-energy, high-comfort, toward Passive House and similar buildings – they need to be properly ventilated. Often centralized systems are not ideal given equipment and ductwork space requirements. […]

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March 15, 2013

The Lunos e² Primer

The Lunos e² decentralized high efficiency heat exchange whole house ventilation system is a breakthrough in building technology –  combining high performance with simplicity of installation and operation. Rather than installing a central heat exchange unit, requiring extensive ducting  and construction intervention and coordination, one can now install Lunos e² units through exterior walls – without ducting. See an introduction […]

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February 18, 2013

LUNOS e² HRV – data for input into PHPP ventilation sheet

The LUNOS e² through wall heat recovery ventilation, allows you to get a very high efficiency heat recovery efficiency, while keeping installation cost to a minimum because the system is ductless. This system has been tested by the German federal agency DIBt, which reported an average efficiency of 90.6%.   Another great feature of the e² is the very […]

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January 23, 2013

Lunos e2 Testimonials

As more Lunos e2 decentralized ventilation system are installed and used we will be collecting a growing list of customer reviews to share. New and retrofit construction in Maine by Ecocor Design/Build’s Chris Corson: This unit has become our go-to for retrofit applications. We even use this system in in new construction projects for whole […]

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January 22, 2013

No Freezing Means No Defrost Mode for Lunos e² High-Efficiency Ventilation

Today’s high efficiency heat exchange ventilation systems conserve energy while providing exceptional indoor air quality and comfort. Yet the performance can be adversely effected in cold climates when temperatures dive below freezing for extended periods of time and the ventilation units go into “defrost mode”.   Defrost mode is really a freeze-prevention mode where the air flow […]

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November 21, 2012

Norwich University Solar Decathlon Entry Emerges

Norwich University’s effort in the 2013 Solar Decathlon, Delta-T-90, recently emerged from the factory in dramatic fashion on a clear brisk Vermont day – as shown on this news video from local NBC affiliate: Showing off the stylish SOLITEX Mento 1000, the truly airtight, waterproof and vapor open WRB produced by Pro Clima – surrounding the […]

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February 23, 2012

Sizing Lunos e² through-wall ventilation units

475 is excited to offer the Lunos e² HRV to the US marketplace – a residential ventilation system of extraordinary value. The value is from very high heat recovery efficiency, providing not just monetary savings but exceptional comfort, ease of installation and the elimination of a ducted distribution system. (more…)

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