Tag Archives: HVAC

HVAC Slab Ductwork Seal & Concrete

First, use expanding foam to fill the ductwork below the floor at each register. Just foam block the area near the floor hole with foam. Then mix up some pre-mix concrete and dump it into the hole in the floor into the ductwork. Fill the duct register hole with the concrete and let it dry. […]


Is Geothermal For You?

Geothermal is an efficient type of electric heat pump for heating and cooling that has enormous advantages. Geothermal actually moves heat in or out of a home just like a regular heat pump to both heat and cool the interior space. However the huge advantage of geothermal is the ground constant temperature like that of […]


Ductwork Cleaning, How Often?

I suggest you decide according to how dirty the ductwork interior appears, how fast your filters fill with dust, or how dirty your house is from a dust standpoint. I suggest that a relatively clean house, as your sounds, have the ductwork cleaned about every 5 years. If you have pets, dusty children or grand […]


Heat & Cool Balance for Two Story Home

Dampers are more effective than not having dampers and offer an improvement but are not the most effective solution. I suggest you consider a second furnace & air conditioning system if you really want this fixed right. Two story homes are unbalanced because heat rises and cold drops. Unless you have multiple thermostats to balance […]


Noisy Ductwork Ticking Sound inside Walls

The noise inside your wall is your metal ductwork as it expands & contracts from the change of temperature inside your walls which is supplied by your forced air furnace. It is a noisy nuisance but not a big threat for the structure or your safety. The noise occurs because the sheet metal gets longer […]


Seal & Insulate Basement Ductwork

Yes, insulate for comfort but the financial return on investment is low when the ductwork is in the basement. Optimal improvement comes when you seal the leaks in your metal ductwork and then insulate the ductwork. The U.S. Department of Energy show an average leakage of 30-35% in most metal ductwork systems. That means that […]


Gas Furnace Electricity Needs

A gas fired, forced air home furnace typically requires a small amount of electricity to ignite and operate in your home. Most gas heat furnaces use less than 600 watts of electricity, or less than half of a typical 15 amp electric circuit. The gas furnace uses this small amount of electricity to power the […]


Floor Joist Squeak & Metal Ductwork

I suspect your squeak is the ductwork sheet metal moving up and down along the shaft of the vertical nail or bracket holding it to the bottom of the floor joists. The 2×12 floor joists on a 16 foot span are well within span limits for single family residences, therefore they are not likely the […]


Radiant Hot Water In-Floor Heat

The liquid in your radiant heat system is circulated by a pump or pumps from your boiler. The flow of hot water or liquid to each room must be balanced according to the heat-loss from insulation or lack of it, amount of glass or doors in the room, sunlight, etc., in order to keep the […]


Radiant Heat Floors

Electric heat for floors are still custom laid into the thin set mortar bed prior to the ceramic tile installation, or in a liquid-set under layment material under carpet floors. There is no economical mat that is any less costly than the laid up custom material. Spaces are so different and the electrician time/expense is […]